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University of Waterloo
1.
Wakefield, Amma.
A Comprehensive Evaluation of Hot Mix Asphalt versus Chemically Modified Warm Mix Asphalt.
Degree: 2011, University of Waterloo
URL: http://hdl.handle.net/10012/6272 
► Warm mix asphalt (WMA) technology has now been successfully used in Ontario for a few years. This shift in usage relates to extensions in construction…
(more)
▼ Warm mix asphalt (WMA) technology has now been successfully used in Ontario for a few years. This shift in usage relates to extensions in construction season, reduced emissions, larger compaction windows, and potential fuel savings. This research between Miller Paving Ltd. and the Centre for Pavement and Transportation Technology attempts to better quantify the difference in hot mix asphalt (HMA) and WMA. The object of this study was three-fold.
The first part of the research was to examine the strength characteristics of HMA and WMA as a function of storage time. The purpose of this evaluation was to quantify indirect tensile strength (ITS) and moisture susceptibility of HMA and WMA over time.
The second objective involved evaluating the performance characteristics of HMA and WMA. Resilient modulus and dynamic modulus testing were completed on plant-produced HMA and WMA material, which was used to determine long-term performance properties of both mixes.
The third and final objective of this study was an economic analysis performed to determine the difference in cost for construction and maintenance for the HMA and WMA pavements. This was completed to determine if the cost of the warm mix technology used in the production of the WMA was offset by fuel savings at the plant.
The findings of the research included:
• HMA and WMA had statistically equivalent air voids over a four-week storage period.
• Dry and wet ITS results for the WMA increased over a four-week storage period while the HMA specimens did not show this same increase.
• WMA material had slightly better workability than the HMA material although the values were statistically equivalent.
• WMA mix had higher resilient modulus values than the HMA mix.
• Dynamic modulus testing showed that at high temperatures, WMA showed to be slightly more susceptible to rutting than the HMA mix, and at lower temperatures, the HMA showed to be slightly more susceptible to fatigue cracking than the WMA mix.
• The MEPDG showed that both the HMA and WMA pavements were deemed to be structurally adequate.
• An economic analysis of the HMA and WMA pavements compared a life cycle cost analysis over a 20-year design life which included all costs associated with construction, maintenance, and rehabilitation of both the HMA and WMA and showed that the HMA was slightly more cost effective than the WMA.
• A field trial was performed by Miller Paving Limited on Highway 62 in Madoc, Ontario showed that the WMA material was more effective at maintaining the temperature of the asphalt mixture during long hauling distances.
• Overall the WMA exhibited the same performance properties as the HMA.
Subjects/Keywords: Hot Mix Asphalt; Warm Mix Asphalt
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APA (6th Edition):
Wakefield, A. (2011). A Comprehensive Evaluation of Hot Mix Asphalt versus Chemically Modified Warm Mix Asphalt. (Thesis). University of Waterloo. Retrieved from http://hdl.handle.net/10012/6272
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Wakefield, Amma. “A Comprehensive Evaluation of Hot Mix Asphalt versus Chemically Modified Warm Mix Asphalt.” 2011. Thesis, University of Waterloo. Accessed March 04, 2021.
http://hdl.handle.net/10012/6272.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Wakefield, Amma. “A Comprehensive Evaluation of Hot Mix Asphalt versus Chemically Modified Warm Mix Asphalt.” 2011. Web. 04 Mar 2021.
Vancouver:
Wakefield A. A Comprehensive Evaluation of Hot Mix Asphalt versus Chemically Modified Warm Mix Asphalt. [Internet] [Thesis]. University of Waterloo; 2011. [cited 2021 Mar 04].
Available from: http://hdl.handle.net/10012/6272.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Wakefield A. A Comprehensive Evaluation of Hot Mix Asphalt versus Chemically Modified Warm Mix Asphalt. [Thesis]. University of Waterloo; 2011. Available from: http://hdl.handle.net/10012/6272
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Michigan Technological University
2.
Mohd Hasan, Mohd Rosli.
PERFORMANCE EVALUATION OF LLDPE/CaCO3 MODIFIERS WITH AND WITHOUT TITANATE COUPLING AGENT ON ASPHALT BINDER AND MIXTURE.
Degree: MS, Department of Civil and Environmental Engineering, 2014, Michigan Technological University
URL: https://digitalcommons.mtu.edu/etd-restricted/186
► The complexity and challenge created by asphalt material motivates researchers and engineers to investigate the behavior of this material to develop a better understanding,…
(more)
▼ The complexity and challenge created by
asphalt material motivates researchers and engineers to investigate the behavior of this material to develop a better understanding, and improve the performance of
asphalt pavement. Over decades, a wide range of modification at macro, meso, micro and nano scales have been conducted to improve the performance of
asphalt pavement. This study was initiated to utilize the newly developed
asphalt modifier pellets. These pellets consisted of different combinations of calcium carbonate (CaCO
3), linear low-density polyethylene (LLDPE) and titanate coupling agent (CA) to improve the
asphalt binder as well as pavement performance across a wide range of temperature and loading pace. These materials were used due to their unique characteristics and promising findings from various industries, especially as modifiers in pavement material. The challenge is to make sure the CaCO
3 disperses very well in the mixture. The rheological properties of neat
asphalt binder PG58-28 and modified
asphalt binder (PG58-28/LLDPE, PG58-28/CaCO
3, PG58-28/CaCO
3/LLDPE, and PG58-28/CaCO
3/LLDPE/CA), were determined using rotational viscometer (RV) test, dynamic shear rheometer (DSR) test and bending beam rheometer test. In the DSR test, the specimens were evaluated using frequency sweep and multiple shear creep recovery (MSCR). The
asphalt mixtures (aggregate/PG58-28, aggregate/ PG58-28/LLDPE, aggregate/PG58-28/CaCO3, aggregate/PG58-28/LLDPE/CaCO
3 and aggregate/PG58-28/LLDPE/CaCO
3/CA) were evaluated using the four point beam fatigue test, the dynamic modulus (E*) test, and tensile strength test (to determines tensile strength ratio, TSR).
The RV test results show that all modified
asphalt binders have a higher viscosity compared to the neat
asphalt binder (PG58-28). Based on the J
nr results (using MSCR test), all the modified
asphalt binders have a better resistance to rutting compared to the neat
asphalt binder. A higher modifier contents have resulted in a better recovery percentage of
asphalt binder (higher resistance to rutting), except the specimens prepared using PECC’s modified
asphalt binder (PG58-28/CaCO
3/LLDPE). The BBR test results show that all the modified
asphalt binders have shown comparable performance in term of resistance to low temperature cracking, except the specimen prepared using the LLDPE modifier. Overall, 5 wt% LLDPE modified
asphalt binder was found to be the best
asphalt binder in terms of resistance to rutting. Meanwhile, 3 wt% PECC-1CA’s modified
asphalt binder can be considered as the best (in terms of resistance to thermal cracking) with the lowest mean critical cracking temperature. The appearance of CaCO
3 was found useful merely in improving the resistance to fatigue cracking of
asphalt mixture. However, application of LLDPE has undermined the fatigue life of
asphalt mixtures. Adding LLDPE and coupling agent throughout this study does not sufficiently…
Advisors/Committee Members: Zhanping You.
Subjects/Keywords: Asphalt Binder; Asphalt Mixture; Asphalt Modification; Hot Mix Asphalt; Pavement Performance; Civil Engineering
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APA (6th Edition):
Mohd Hasan, M. R. (2014). PERFORMANCE EVALUATION OF LLDPE/CaCO3 MODIFIERS WITH AND WITHOUT TITANATE COUPLING AGENT ON ASPHALT BINDER AND MIXTURE. (Masters Thesis). Michigan Technological University. Retrieved from https://digitalcommons.mtu.edu/etd-restricted/186
Chicago Manual of Style (16th Edition):
Mohd Hasan, Mohd Rosli. “PERFORMANCE EVALUATION OF LLDPE/CaCO3 MODIFIERS WITH AND WITHOUT TITANATE COUPLING AGENT ON ASPHALT BINDER AND MIXTURE.” 2014. Masters Thesis, Michigan Technological University. Accessed March 04, 2021.
https://digitalcommons.mtu.edu/etd-restricted/186.
MLA Handbook (7th Edition):
Mohd Hasan, Mohd Rosli. “PERFORMANCE EVALUATION OF LLDPE/CaCO3 MODIFIERS WITH AND WITHOUT TITANATE COUPLING AGENT ON ASPHALT BINDER AND MIXTURE.” 2014. Web. 04 Mar 2021.
Vancouver:
Mohd Hasan MR. PERFORMANCE EVALUATION OF LLDPE/CaCO3 MODIFIERS WITH AND WITHOUT TITANATE COUPLING AGENT ON ASPHALT BINDER AND MIXTURE. [Internet] [Masters thesis]. Michigan Technological University; 2014. [cited 2021 Mar 04].
Available from: https://digitalcommons.mtu.edu/etd-restricted/186.
Council of Science Editors:
Mohd Hasan MR. PERFORMANCE EVALUATION OF LLDPE/CaCO3 MODIFIERS WITH AND WITHOUT TITANATE COUPLING AGENT ON ASPHALT BINDER AND MIXTURE. [Masters Thesis]. Michigan Technological University; 2014. Available from: https://digitalcommons.mtu.edu/etd-restricted/186
Addis Ababa University
3.
Tewodros, Nigatu.
EXPERIMENTAL INVESTIGATION OF USE OF GLASS CULLET AS ASPHALT MIXTURE AGGREGATE
.
Degree: 2014, Addis Ababa University
URL: http://etd.aau.edu.et/dspace/handle/123456789/6118
► Various studies have shown that replacement of natural aggregate by crushed waste glass on the performance of asphalt concrete pavements. This study was intended to…
(more)
▼ Various studies have shown that replacement of natural aggregate by crushed waste glass on the
performance of
asphalt concrete pavements.
This study was intended to investigate the effect of using cullet
asphalt concrete aggregate, derive the
maximum allowable percentage and evaluate the economic advantage. Crushed glass with different
percentages by total weight of the mixture was used in the study.
Cleaned and crushed, waste glass resulted from glass bottles has been added to the
asphalt mixture
using a gradation of (0/4.75) mm. Marshall Method was used to determine the Optimum Binder
Content (OBC) and to evaluate the properties of the glasphalt
mix. Using the different glass content at
their respective optimum
asphalt content, specimens were prepared to investigate moisture
susceptibility of
asphalt mixtures. The Marshal Immersion test method was adapted to determine the
moisture effect of mixtures. In total, 130 samples were prepared, 100 of which have been used to
determine the OBC for each glass content, and the rest have been used to find out the moisture
susceptibility of different percentages of crushed waste glass in the
asphalt mixture.
The results of the experiments (Marshall Stability, flow, specific gravity & air voids) are consistent to
the local and international specifications, except the marshal stability reduction at 20% replacement
rate.
Crushed waste glass can be used in
asphalt binder course with the maximal size of 4.75mm
and the optimum replacement 15% glass.
Advisors/Committee Members: Dr.Bikila Teklu (advisor).
Subjects/Keywords: Glasphalt;
Cullet;
Hot Mix Asphalt;
Moisture susceptibility;
Stripping;
Asphalt
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APA ·
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Manager
APA (6th Edition):
Tewodros, N. (2014). EXPERIMENTAL INVESTIGATION OF USE OF GLASS CULLET AS ASPHALT MIXTURE AGGREGATE
. (Thesis). Addis Ababa University. Retrieved from http://etd.aau.edu.et/dspace/handle/123456789/6118
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Tewodros, Nigatu. “EXPERIMENTAL INVESTIGATION OF USE OF GLASS CULLET AS ASPHALT MIXTURE AGGREGATE
.” 2014. Thesis, Addis Ababa University. Accessed March 04, 2021.
http://etd.aau.edu.et/dspace/handle/123456789/6118.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Tewodros, Nigatu. “EXPERIMENTAL INVESTIGATION OF USE OF GLASS CULLET AS ASPHALT MIXTURE AGGREGATE
.” 2014. Web. 04 Mar 2021.
Vancouver:
Tewodros N. EXPERIMENTAL INVESTIGATION OF USE OF GLASS CULLET AS ASPHALT MIXTURE AGGREGATE
. [Internet] [Thesis]. Addis Ababa University; 2014. [cited 2021 Mar 04].
Available from: http://etd.aau.edu.et/dspace/handle/123456789/6118.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Tewodros N. EXPERIMENTAL INVESTIGATION OF USE OF GLASS CULLET AS ASPHALT MIXTURE AGGREGATE
. [Thesis]. Addis Ababa University; 2014. Available from: http://etd.aau.edu.et/dspace/handle/123456789/6118
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Waterloo
4.
Islam, Riyad-UL.
Performance Evaluation of Recycled Asphalt Shingles (RAS) in Hot Mix Asphalt (HMA): An Ontario Perspective.
Degree: 2011, University of Waterloo
URL: http://hdl.handle.net/10012/5834
► Today, a large quantity of waste is generated from the replacement of residential and commercial roofs. Many of the roofs being upgraded with previously constructed…
(more)
▼ Today, a large quantity of waste is generated from the replacement of residential and commercial roofs. Many of the roofs being upgraded with previously constructed from asphalt shingles. Recycled Asphalt Shingles (RAS) contain nearly 30% of asphalt cement by mass, which can be a useful additive to asphalt pavements. In addition, shingles can offer significant potential savings through recycling and recovery as a construction material in flexible pavement. Currently, one and a half million tons of roofing shingle waste is generated each year in Canada related to the replacement of residential and commercial roofs and 90% of this valuable material is sent to landfills. If engineered properly, the addition of RAS into Hot Mix Asphalt (HMA) can provide significant benefits. The University of Waterloo’s Centre for Pavement and Transportation Technology (CPATT) is committed to working with public and private sector partners to develop sustainable technologies for the pavement industry. Using RAS in HMA can lead to economical, environmental and social benefits. Examples of which are reduced waste going to landfills and a reduction in the quantity of virgin material required.
This research has involved the Ontario Centres of Excellence (OCE) and Miller Paving Limited. It was conducted to evaluate the performance of HMA containing RAS in both field and laboratory tests. A varying percentage of RAS was added to six common Ontario surface and binder layer of asphalt mixes. The intent was to determine if RAS could be added to improve performance and provide longer term cost savings. Laboratory testing was performed to evaluate the mix behavior. The elastic properties, fatigue life and resistance to thermal cracking were all evaluated at the CPATT laboratory. The characteristics of the mixes were evaluated by carrying out Dynamic Modulus, Resilient Modulus, Flexural Fatigue and Thermal Stress Restrained Specimen Test (TSRST) tests following American Association of State Highway and Transportation Officials (AASHTO) and American Society for Testing and Materials (ASTM) standards. Field test sections were constructed from HMA containing RAS to monitor the pavement behavior under natural environmental and traffic loading conditions. Evaluation of the field sites was performed using a Portable Falling Weight Deflectometer (PFWD) and carrying out distress surveys following the Ministry of Transportation Ontario (MTO) guidelines. The results to date show the sections performing very well with minimal to no distress developing.
The results of the laboratory testing and field performance evaluations have shown encouraging results for the future use of RAS in HMA. If RAS can properly be engineered into HMA it can be a useful additive in both the surface and binder layers of the flexible pavement structure. Ultimately, the use of RAS in HMA can provide both an environmentally friendly and cost effective solution to the Ontario paving industry.
Subjects/Keywords: Recycled Asphalt Shingles (RAS); Hot Mix Asphalt (HMA)
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APA ·
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Export
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Manager
APA (6th Edition):
Islam, R. (2011). Performance Evaluation of Recycled Asphalt Shingles (RAS) in Hot Mix Asphalt (HMA): An Ontario Perspective. (Thesis). University of Waterloo. Retrieved from http://hdl.handle.net/10012/5834
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Islam, Riyad-UL. “Performance Evaluation of Recycled Asphalt Shingles (RAS) in Hot Mix Asphalt (HMA): An Ontario Perspective.” 2011. Thesis, University of Waterloo. Accessed March 04, 2021.
http://hdl.handle.net/10012/5834.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Islam, Riyad-UL. “Performance Evaluation of Recycled Asphalt Shingles (RAS) in Hot Mix Asphalt (HMA): An Ontario Perspective.” 2011. Web. 04 Mar 2021.
Vancouver:
Islam R. Performance Evaluation of Recycled Asphalt Shingles (RAS) in Hot Mix Asphalt (HMA): An Ontario Perspective. [Internet] [Thesis]. University of Waterloo; 2011. [cited 2021 Mar 04].
Available from: http://hdl.handle.net/10012/5834.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Islam R. Performance Evaluation of Recycled Asphalt Shingles (RAS) in Hot Mix Asphalt (HMA): An Ontario Perspective. [Thesis]. University of Waterloo; 2011. Available from: http://hdl.handle.net/10012/5834
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Kansas State University
5.
Sabahfar, Nassim.
Effect of
asphalt rejuvenating agent on aged reclaimed asphalt pavement and
binder properties.
Degree: PhD, Department of Civil
Engineering, 2016, Kansas State University
URL: http://hdl.handle.net/2097/32801
► Hot in-place recycling (HIR) preserves distressed asphalt pavements while minimizing use of virgin binder and aggregates. The final quality of an HIR mixture depends on…
(more)
▼ Hot in-place recycling (HIR) preserves distressed
asphalt pavements while minimizing use of virgin binder and
aggregates. The final quality of an HIR mixture depends on
characteristics of the original binder, aging of the pavement
surface during service, and whether or not new binder or
rejuvenator was added to the mixture. An HIR mixture should
maintain desired properties for additional service periods, making
asphalt binder modification inevitable.
Asphalt binder
modifications in HIR are commonly done by adding an
asphalt
rejuvenating agent (ARA). However, ARA may adversely affect the
qualities of new HIR and potentially fail to improve the quality of
the final surface.
The objective of this research was to
investigate the effects of rejuvenation on HIR performance
characteristics by assessing critical performance indicators such
as stiffness, permanent deformation, moisture susceptibility, and
cracking resistance. A two-step experimental program was designed
that included mechanical property measurements of the HIR mixture
and rheological properties of the extracted binder. The level of
mixing occurring between new and aged binder with ARA was also
investigated. HIR Samples were obtained from three Kansas
Department of Transportation projects, and Hamburg wheel-tracking
device, dynamic modulus, flow number, Texas overlay, thermal stress
restrained specimen, and moisture susceptibility tests were
conducted on mixtures with and without ARA. Rheological studies on
the extracted binder included dynamic shear rheometer and bending
beam rheometer tests. The miscibility of new and aged binder was
investigated using scanning electron microscope (SEM) images,
energy dispersive X-ray spectroscopy (EDXS), and the exudation
droplet test (EDT). Study results showed significant variability in
the mechanical performance of HIR mixtures, which was attributed to
the variability of binders as observed in EDT, SEM and EDXS
studies.
Life cycle cost analysis (LCCA) showed that HIR is an
economic maintenance alternative for
asphalt projects in Kansas.
LCCA results exhibited that pavement design strategies with HIR
activities will result in alternatives with lower net present
values when compared to alternatives without HIR maintenance
activities.
Advisors/Committee Members: Mustaque Hossain.
Subjects/Keywords: Hot mix
asphalt; Hot in-place
recycling; Asphalt rejuvenating
agent; Asphalt
binder; Aging; Reclaimed asphalt
pavement
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APA ·
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Manager
APA (6th Edition):
Sabahfar, N. (2016). Effect of
asphalt rejuvenating agent on aged reclaimed asphalt pavement and
binder properties. (Doctoral Dissertation). Kansas State University. Retrieved from http://hdl.handle.net/2097/32801
Chicago Manual of Style (16th Edition):
Sabahfar, Nassim. “Effect of
asphalt rejuvenating agent on aged reclaimed asphalt pavement and
binder properties.” 2016. Doctoral Dissertation, Kansas State University. Accessed March 04, 2021.
http://hdl.handle.net/2097/32801.
MLA Handbook (7th Edition):
Sabahfar, Nassim. “Effect of
asphalt rejuvenating agent on aged reclaimed asphalt pavement and
binder properties.” 2016. Web. 04 Mar 2021.
Vancouver:
Sabahfar N. Effect of
asphalt rejuvenating agent on aged reclaimed asphalt pavement and
binder properties. [Internet] [Doctoral dissertation]. Kansas State University; 2016. [cited 2021 Mar 04].
Available from: http://hdl.handle.net/2097/32801.
Council of Science Editors:
Sabahfar N. Effect of
asphalt rejuvenating agent on aged reclaimed asphalt pavement and
binder properties. [Doctoral Dissertation]. Kansas State University; 2016. Available from: http://hdl.handle.net/2097/32801
6.
Rahbar-Rastegar, Reyhaneh.
CRACKING IN ASPHALT PAVEMENTS: IMPACT OF COMPONENT PROPERTIES AND AGING ON FATIGUE AND THERMAL CRACKING.
Degree: PhD, 2017, University of New Hampshire
URL: https://scholars.unh.edu/dissertation/2284
► Cracking in asphalt pavements is one of the most common and critical pavement distresses. Cracks let the water penetrate from the surface to underlying…
(more)
▼ Cracking in
asphalt pavements is one of the most common and critical pavement distresses. Cracks let the water penetrate from the surface to underlying layers resulting in shorter pavement service life and poor riding quality. There are various factors that affect the cracking potential of
asphalt mixtures including the properties of
asphalt components,
mix design factors, loading time and loading mode, temperature, stress state, and aging. While several researchers have conducted studies investigating the cracking of
asphalt mixtures, the effective parameters are not all well understood to allow engineers to design and construct more resistant pavements against cracking.
The work presented in this dissertation provides some additional insights into the effects of component properties and aging condition on
asphalt cracking. The cracking susceptibility of
hot mix asphalt (HMA) is evaluated through the experimental testing and numerical modeling on mixtures produced either in design (laboratory) or production (plant) stage. Various criteria and approaches for the prediction of cracking in
asphalt binder and
asphalt mixture are assessed and their correlation are discussed. Different levels of aging in laboratory are simulated, and the effects of long term oven aging (LTOA) on linear viscoelastic parameters, fatigue and fracture characteristics of
asphalt mixtures are explored. The uniaxial tensile fatigue testing based on simplified viscoelastic continuum damage (SVECD) approach is conducted to characterize fatigue behavior, and semi circular bending (SCB), disc-shaped compact tension (DCT) testing and cohesive zone model are used to evaluate thermal cracking in
asphalt mixtures.
This dissertation makes a good contribution in improvement of available approaches for evaluation of cracking potential of
asphalt pavements and allows for assessment of different mixtures at early stage of material selection. The results of this study can lead to develop a new parameter to predict fatigue and thermal cracking susceptibility of flexible pavements in performance-based specifications, resulting in a better ride quality and cost saving for contractors and taxpayers.
Advisors/Committee Members: Jo Sias Daniel, Dave Eshan Sias, Ghayoomi Majid Sias.
Subjects/Keywords: Aging; Asphalt binder; Fatigue cracking; Hot mix asphalt; Thermal cracking; Civil engineering
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APA ·
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Export
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APA (6th Edition):
Rahbar-Rastegar, R. (2017). CRACKING IN ASPHALT PAVEMENTS: IMPACT OF COMPONENT PROPERTIES AND AGING ON FATIGUE AND THERMAL CRACKING. (Doctoral Dissertation). University of New Hampshire. Retrieved from https://scholars.unh.edu/dissertation/2284
Chicago Manual of Style (16th Edition):
Rahbar-Rastegar, Reyhaneh. “CRACKING IN ASPHALT PAVEMENTS: IMPACT OF COMPONENT PROPERTIES AND AGING ON FATIGUE AND THERMAL CRACKING.” 2017. Doctoral Dissertation, University of New Hampshire. Accessed March 04, 2021.
https://scholars.unh.edu/dissertation/2284.
MLA Handbook (7th Edition):
Rahbar-Rastegar, Reyhaneh. “CRACKING IN ASPHALT PAVEMENTS: IMPACT OF COMPONENT PROPERTIES AND AGING ON FATIGUE AND THERMAL CRACKING.” 2017. Web. 04 Mar 2021.
Vancouver:
Rahbar-Rastegar R. CRACKING IN ASPHALT PAVEMENTS: IMPACT OF COMPONENT PROPERTIES AND AGING ON FATIGUE AND THERMAL CRACKING. [Internet] [Doctoral dissertation]. University of New Hampshire; 2017. [cited 2021 Mar 04].
Available from: https://scholars.unh.edu/dissertation/2284.
Council of Science Editors:
Rahbar-Rastegar R. CRACKING IN ASPHALT PAVEMENTS: IMPACT OF COMPONENT PROPERTIES AND AGING ON FATIGUE AND THERMAL CRACKING. [Doctoral Dissertation]. University of New Hampshire; 2017. Available from: https://scholars.unh.edu/dissertation/2284
Texas A&M University
7.
Geiger, Brian James.
The Effects of Using Alkali-Silica Reaction Affected Recycled Concrete Aggregate in Hot Mix Asphalt.
Degree: MS, Civil Engineering, 2011, Texas A&M University
URL: http://hdl.handle.net/1969.1/ETD-TAMU-2010-08-8504
► The effects of using alkali-silica reaction (ASR) affected recycled concrete aggregate (ASR-RCA) in hot mix asphalt (HMA) were investigated in this study. Dilatometer and modified…
(more)
▼ The effects of using alkali-silica reaction (ASR) affected recycled concrete
aggregate (ASR-RCA) in
hot mix asphalt (HMA) were investigated in this study.
Dilatometer and modified beam tests were performed to determine the possibility of new
ASR occurring in reactive aggregates within the HMA or re-expansion of existing gel.
The Lottman test and micro-calorimeter were used to determine the moisture
susceptibility of HMA made with ASR-RCA. A differential scanning calorimeter
(DSC) with thermogravimetric analysis (TGA) was used to evaluate the drying of an
artificial gel and x-ray diffraction (XRD) was used to check for the potential presence of
gel in the filler fraction of the ASR-RCAs. Micro-deval and freeze-thaw tests were
evaluated for their potential to indicate the presence of excess micro-cracks or ASR gel.
Expansion testing indicated that both ASR-RCAs were still reactive with 0.5 N
NaOH solution saturated with calcium hydroxide (CH) at 60 degrees C. Dilatometer testing of
HMA specimens in NaOH CH solution at 60 degrees C indicated a reaction between the
asphalt
binder and the solution, but little, if any, ASR. The lack of expansion in the modified
beam test supports the binder-solution interaction. However, dilatometer testing in
deicer solution at the same temperature indicated that some ASR may have occurred
along with the primary binder-solution interaction. The volume change characteristics
associated with the binder-solution interaction with and without ASR was supported by
the change in pH and alkali concentration of the test solution.
DSC/TGA testing indicated that the artificial gel dehydrated at approximately
100 degrees C. XRD analysis of the filler indicated that some gel may have accumulated in this
fraction. Moisture damage testing indicated good resistance to moisture damage by
HMA mixtures made with ASR-RCA especially compared to a virgin siliceous
aggregate. Micro-deval and freeze-thaw tests can detect the presence of micro-cracks
due to ASR in ASR-RCAs as higher mass loss than the virgin aggregate.
The potential distress mechanisms that may occur when using ASR-RCA in an
HMA pavement were identified. Results obtained using accelerated laboratory
conditions were extrapolated based on anticipated field conditions. Guidelines for the
mitigation of potential distresses in HMA made with ASR-RCA are presented.
Advisors/Committee Members: Mukhopadhyay, AnAl K. (advisor), Zollinger, Dan G. (advisor), Martin, Amy (committee member), Haque, Mohammed (committee member).
Subjects/Keywords: Alkali-Silica Reaction; Recycled Concrete Aggregate; Hot Mix Asphalt; Dilatometer
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APA (6th Edition):
Geiger, B. J. (2011). The Effects of Using Alkali-Silica Reaction Affected Recycled Concrete Aggregate in Hot Mix Asphalt. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2010-08-8504
Chicago Manual of Style (16th Edition):
Geiger, Brian James. “The Effects of Using Alkali-Silica Reaction Affected Recycled Concrete Aggregate in Hot Mix Asphalt.” 2011. Masters Thesis, Texas A&M University. Accessed March 04, 2021.
http://hdl.handle.net/1969.1/ETD-TAMU-2010-08-8504.
MLA Handbook (7th Edition):
Geiger, Brian James. “The Effects of Using Alkali-Silica Reaction Affected Recycled Concrete Aggregate in Hot Mix Asphalt.” 2011. Web. 04 Mar 2021.
Vancouver:
Geiger BJ. The Effects of Using Alkali-Silica Reaction Affected Recycled Concrete Aggregate in Hot Mix Asphalt. [Internet] [Masters thesis]. Texas A&M University; 2011. [cited 2021 Mar 04].
Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2010-08-8504.
Council of Science Editors:
Geiger BJ. The Effects of Using Alkali-Silica Reaction Affected Recycled Concrete Aggregate in Hot Mix Asphalt. [Masters Thesis]. Texas A&M University; 2011. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2010-08-8504
Texas A&M University
8.
Al-Khayat, Haydar Tahseen Ali.
A Case Study for Developing Specification Limits for Hot-Mix Asphalt and the Impact on Pay Factors.
Degree: MS, Civil Engineering, 2018, Texas A&M University
URL: http://hdl.handle.net/1969.1/173949
► Specification limits utilized in percent within limits (PWL) specifications are developed by highway agencies, and used to determine the percent of hot-mix asphalt “Lot” within…
(more)
▼ Specification limits utilized in percent within limits (PWL) specifications are developed by highway agencies, and used to determine the percent of
hot-
mix asphalt “Lot” within specified limits, and used later to make payments to contractors. Development of specification limits must be based on the typical variability of test results used in PWL specifications. Using overly wide or tight specification limits to evaluate the new pavement could cause risk for highway agencies or contractors, respectively. This study explains how to develop new specification limits and evaluate the current ones by using different data sets from projects conducted by the Oregon Department of Transportation (ODOT).
All the calculations and analysis performed in this study are based on data collected from 15 different projects and contractors. Typical standard deviations (within-process variability) and “target miss” variability (how the mean values of test results are variable around the target values) have been determined for aggregate gradation,
asphalt content, and in-place density which are considered as pay-elements in ODOT standard specifications. New specification limits have been developed based on typical variability. Then current specification limits adopted by ODOT were evaluated and compared to the proposed new specification limits. Three projects have been utilized to investigate the impact of using the proposed new specification limits on final payment. Using the developed new limits will lead to a decrease in the final costs of the projects. Also, ODOT will see an improvement in contractors’ performance as these new limits will encourage the contractors to use high-quality materials with a low variability. It is recommended that DOTs consider regular evaluation of their specification limits by using new records and modify the specifications when needed.
Advisors/Committee Members: Sakhaeifar, Maryam (advisor), Epps Martin, Amy (committee member), Bhattacharya, Anirban (committee member).
Subjects/Keywords: Specification Limits; Hot-Mix Asphalt; PWL; Pay Factors
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APA (6th Edition):
Al-Khayat, H. T. A. (2018). A Case Study for Developing Specification Limits for Hot-Mix Asphalt and the Impact on Pay Factors. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/173949
Chicago Manual of Style (16th Edition):
Al-Khayat, Haydar Tahseen Ali. “A Case Study for Developing Specification Limits for Hot-Mix Asphalt and the Impact on Pay Factors.” 2018. Masters Thesis, Texas A&M University. Accessed March 04, 2021.
http://hdl.handle.net/1969.1/173949.
MLA Handbook (7th Edition):
Al-Khayat, Haydar Tahseen Ali. “A Case Study for Developing Specification Limits for Hot-Mix Asphalt and the Impact on Pay Factors.” 2018. Web. 04 Mar 2021.
Vancouver:
Al-Khayat HTA. A Case Study for Developing Specification Limits for Hot-Mix Asphalt and the Impact on Pay Factors. [Internet] [Masters thesis]. Texas A&M University; 2018. [cited 2021 Mar 04].
Available from: http://hdl.handle.net/1969.1/173949.
Council of Science Editors:
Al-Khayat HTA. A Case Study for Developing Specification Limits for Hot-Mix Asphalt and the Impact on Pay Factors. [Masters Thesis]. Texas A&M University; 2018. Available from: http://hdl.handle.net/1969.1/173949
Texas A&M University
9.
Lawrence, James 1973-.
Application of Direct Tension Testing to Field Samples to Investigate the Effects of HMA Aging.
Degree: PhD, Civil Engineering, 2012, Texas A&M University
URL: http://hdl.handle.net/1969.1/148088
► There are many factors which contribute to fatigue failure in HMA. While studies have been made with respect to binder aging, little has been done…
(more)
▼ There are many factors which contribute to fatigue failure in HMA. While studies have been made with respect to binder aging, little has been done to investigate the effect of aging on the fatigue failure of
asphalt mixtures. The lack of an effective and efficient method of testing field samples has contributed to this deficiency. This study focused on the development of a method for preparing and testing field samples in direct tension. This methodology was then be employed in combination with the VEC and RDT* tests to investigate several factors that affect fatigue in HMA. Particular emphasis was placed on the role of aging in the fatigue process.
A method of testing field samples in direct tension was successfully developed. Results from the VEC and RDT* tests performed on several field samples collected from across the state of Texas were analyzed. US 277 field sample results were compared to laboratory mixed and compacted (LMLC) sample results as well as results obtained from extracted binder testing. Findings show that oxidative aging has an impact on the stiffness and performance of HMA. Chip seal surface treatments can extend the life of the pavement, but their affects are found primarily at the surface.
Two additional field sites were tested, analyzed, and compared to LMLC results. These comparisons verified the effects of aging and show that a relationship between LMLC samples and field samples can be developed. Modulus values for one month of artificial aging of LMLC samples is equivalent to 10.5 months of aging in the field.
Finally, 21 Texas sites used for the study were analyzed and a multivariate linear regression was performed to determine the factors that play the most significant role in the aging process. A linear regression model was constructed to determine the number of loads to failure from fatigue cracking due, primarily, to aging.
Advisors/Committee Members: Epps Martin, Amy (advisor), Glover, Charles J (committee member), Little, Dallas N (committee member), Lytton, Robert L (committee member).
Subjects/Keywords: Field Samples; Uniaxial Testing; Binder Aging; Hot Mix Asphalt
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APA (6th Edition):
Lawrence, J. 1. (2012). Application of Direct Tension Testing to Field Samples to Investigate the Effects of HMA Aging. (Doctoral Dissertation). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/148088
Chicago Manual of Style (16th Edition):
Lawrence, James 1973-. “Application of Direct Tension Testing to Field Samples to Investigate the Effects of HMA Aging.” 2012. Doctoral Dissertation, Texas A&M University. Accessed March 04, 2021.
http://hdl.handle.net/1969.1/148088.
MLA Handbook (7th Edition):
Lawrence, James 1973-. “Application of Direct Tension Testing to Field Samples to Investigate the Effects of HMA Aging.” 2012. Web. 04 Mar 2021.
Vancouver:
Lawrence J1. Application of Direct Tension Testing to Field Samples to Investigate the Effects of HMA Aging. [Internet] [Doctoral dissertation]. Texas A&M University; 2012. [cited 2021 Mar 04].
Available from: http://hdl.handle.net/1969.1/148088.
Council of Science Editors:
Lawrence J1. Application of Direct Tension Testing to Field Samples to Investigate the Effects of HMA Aging. [Doctoral Dissertation]. Texas A&M University; 2012. Available from: http://hdl.handle.net/1969.1/148088
Queens University
10.
Ghimire, Bidur Chandra.
Low Temperature Testing of Ontario Hot Mix Asphalt and Rheological Testing of Recovered Binder
.
Degree: Chemistry, 2015, Queens University
URL: http://hdl.handle.net/1974/12816
► This thesis discusses and documents findings from an investigation of low temperature testing of asphalt mixes and rheological testing of binders. A number of asphalt…
(more)
▼ This thesis discusses and documents findings from an investigation of low temperature testing of asphalt mixes and rheological testing of binders. A number of asphalt mixes from the different Ontario Ministry of Transportation (MTO) and the City of Kingston construction contracts were investigated for their compliance with conventional Superpave® test methods such as indirect tensile test (IDT), dynamic shear rheometer (DSR) and bending beam rheometer (BBR) as well as additional specification tests such as extended BBR and double-edge-notched tension (DENT) test. To investigate the presence of polymer additives and waste engine oil in the binder X-ray fluorescence (XRF) and infrared spectroscopy (IR) tests were conducted. The American Association of State Highway and Transportation Official’s Mechanistic-Empirical Pavement Design Guide (AASHTO MEPDG) software was used to predict long term low temperature performance of the mixtures in various regions of Ontario. The quality and durability of the binders recovered from some mixes were determined. Quality means the capacity of asphalt binder to reach a set of specific properties whereas durability is the measure of how well the asphalt resists change from its original characteristics when exposed to normal weathering and aging.
Tested contracts from the City of Kingston showed grade excesses when stored isothermally for three days at low temperatures according to Ontario’s extended bending beam rheometer (BBR) protocol (LS-308) whereas most of the MTO contracts showed grade deficits. Few of the studied recovered asphalt samples showed deficient strain tolerance as measured in Ontario’s double-edge-notched tension (DENT) test (LS-299).
The City of Kingston samples showed predicted times to failure from 9 to 15 years or greater whereas most MTO samples resulted in predicted times to failure of 1 to 5 years. X-ray fluorescence and Fourier transform infrared spectroscopy (FTIR) indicated that most of the samples designed according to MTO specifications included waste engine oil and/or oxidized residues, both shown to reduce the performance of asphalt.
Subjects/Keywords: Rheological Testing
;
MEPDG
;
Thermal Cracking
;
DSR
;
IDT Testing
;
Hot Mix Asphalt
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APA (6th Edition):
Ghimire, B. C. (2015). Low Temperature Testing of Ontario Hot Mix Asphalt and Rheological Testing of Recovered Binder
. (Thesis). Queens University. Retrieved from http://hdl.handle.net/1974/12816
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Ghimire, Bidur Chandra. “Low Temperature Testing of Ontario Hot Mix Asphalt and Rheological Testing of Recovered Binder
.” 2015. Thesis, Queens University. Accessed March 04, 2021.
http://hdl.handle.net/1974/12816.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Ghimire, Bidur Chandra. “Low Temperature Testing of Ontario Hot Mix Asphalt and Rheological Testing of Recovered Binder
.” 2015. Web. 04 Mar 2021.
Vancouver:
Ghimire BC. Low Temperature Testing of Ontario Hot Mix Asphalt and Rheological Testing of Recovered Binder
. [Internet] [Thesis]. Queens University; 2015. [cited 2021 Mar 04].
Available from: http://hdl.handle.net/1974/12816.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Ghimire BC. Low Temperature Testing of Ontario Hot Mix Asphalt and Rheological Testing of Recovered Binder
. [Thesis]. Queens University; 2015. Available from: http://hdl.handle.net/1974/12816
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Arizona State University
11.
Souliman, Mena Ibrahim Ifram.
Integrated Predictive Model for Healing and Fatigue
Endurance Limit for Asphalt Concrete.
Degree: PhD, Civil and Environmental Engineering, 2012, Arizona State University
URL: http://repository.asu.edu/items/14701
► One of the main requirements of designing perpetual pavements is to determine the endurance limit of Hot Mix Asphalt (HMA). The purpose of this study…
(more)
▼ One of the main requirements of designing perpetual
pavements is to determine the endurance limit of Hot Mix Asphalt
(HMA). The purpose of this study was to validate the endurance
limit for HMA using laboratory beam fatigue tests. A mathematical
procedure was developed to determine the endurance limit of HMA due
to healing that occurs during the rest periods between loading
cycles. Relating healing to endurance limit makes this procedure
unique compared to previous research projects that investigated
these concepts separately. An extensive laboratory testing program,
including 468 beam tests, was conducted according to AASHTO T321-03
test procedure. Six factors that affect the fatigue response of HMA
were evaluated: binder type, binder content, air voids, test
temperature, rest period and applied strain. The endurance limit
was determined when no accumulated damage occurred indicating
complete healing. Based on the test results, a first generation
predictive model was developed to relate stiffness ratio to
material properties. A second generation stiffness ratio model was
also developed by replacing four factors (binder type, binder
content, air voids, and temperature) with the initial stiffness of
the mixture, which is a basic material property. The model also
accounts for the nonlinear effects of the rest period and the
applied strain on the healing and endurance limit. A third
generation model was then developed by incorporation the number of
loading cycles at different locations along the fatigue degradation
curve for each test in order to account for the nonlinearity
between stiffness ratio and loading cycles. In addition to
predicting endurance limit, the model has the ability to predict
the number of cycles to failure at any rest period and stiffness
combination. The model was used to predict fatigue relationship
curves for tests with rest period and determining the K1, K2, and
K3 fatigue cracking coefficients. The three generation models
predicted close endurance limit values ranging from 22 to 204 micro
strains. After developing the third generation stiffness ratio
model, the predicted endurance limit values were integrated in the
strain-Nf fatigue relationships as a step toward incorporating the
endurance limit in the MEPDG software. The results of this study
can be used to design perpetual pavements that can sustain a large
number of loads if traffic volumes and vehicle weights are
controlled.
Subjects/Keywords: Civil engineering; Endurance Limit; Fatigue; Healing; Hot Mix Asphalt; Rest Period
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APA (6th Edition):
Souliman, M. I. I. (2012). Integrated Predictive Model for Healing and Fatigue
Endurance Limit for Asphalt Concrete. (Doctoral Dissertation). Arizona State University. Retrieved from http://repository.asu.edu/items/14701
Chicago Manual of Style (16th Edition):
Souliman, Mena Ibrahim Ifram. “Integrated Predictive Model for Healing and Fatigue
Endurance Limit for Asphalt Concrete.” 2012. Doctoral Dissertation, Arizona State University. Accessed March 04, 2021.
http://repository.asu.edu/items/14701.
MLA Handbook (7th Edition):
Souliman, Mena Ibrahim Ifram. “Integrated Predictive Model for Healing and Fatigue
Endurance Limit for Asphalt Concrete.” 2012. Web. 04 Mar 2021.
Vancouver:
Souliman MII. Integrated Predictive Model for Healing and Fatigue
Endurance Limit for Asphalt Concrete. [Internet] [Doctoral dissertation]. Arizona State University; 2012. [cited 2021 Mar 04].
Available from: http://repository.asu.edu/items/14701.
Council of Science Editors:
Souliman MII. Integrated Predictive Model for Healing and Fatigue
Endurance Limit for Asphalt Concrete. [Doctoral Dissertation]. Arizona State University; 2012. Available from: http://repository.asu.edu/items/14701
University of Waterloo
12.
Ddamba, Shirley Jacqueline.
Evaluation of the Effect of Recycled Asphalt Shingles on Ontario Hot Mix Pavement.
Degree: 2011, University of Waterloo
URL: http://hdl.handle.net/10012/6285
► Due to the 15-20 year life span of roofing shingles, 1.5 million tonnes of asphalt roofing shingles are being demolished and replaced annually in Canada…
(more)
▼ Due to the 15-20 year life span of roofing shingles, 1.5 million tonnes of asphalt roofing shingles are being demolished and replaced annually in Canada from both residential and commercial facilities. These roofing shingles are manufactured from very high quality materials which are considered a valuable by-product. Recycled Asphalt Shingles (RAS), a product containing approximately 30% asphalt cement by mass, is a valuable additive to Hot Mix Asphalt (HMA) pavements and a potential savings for the construction industry.
Recycling of demolished asphalt shingles is a significant new step forward in abating the need to put the waste into landfills. This re-use creates a great opportunity in reducing materials being dumped at landfills while providing an additive to HMA mixtures for paving. Therefore, this leads to economic, environmental, and social benefits for all the stakeholders and road users such as reduced need for landfill space, conservation of virgin materials and environment, and financial saving.
The research involved evaluating the use of demolished shingles in six typical Ontario Hot Mix Asphalt (HMA) mixtures; HL 3 (1.5% RAS, 13.5% RAP), binder layer mixes SP19 (6% RAS, and 3% RAS, 25% RAP), surface layer mixes SP12.5 FC 1(3% RAS, 17% RAP) and SP12.5 FC2 (6% RAS and 3% RAS, 12% RAP). The six HMA mixes were also designed to contain Recycled Asphalt Pavement (RAP). This further complicated the research as both RAP and RAS were added. All mixes were designed and tested at CPATT laboratory; in addition a test section was paved at the CPATT Test Track.
This research involved both laboratory and field evaluations of mixes containing RAS to develop pavement performance modeling for all six mixes using the updated Mechanistic-Empirical Pavement Design Guide (MEPDG). A life-cycle assessment of the six HMA mixes was performed to quantify the environmental impacts using the Pavement Life-Cycle Assessment Tool for Environmental and Economic Effects (PaLATE) and rigorous economic costs/benefits were assessed using Life Cycle Cost Analysis (LCCA). Calibrations of models for Ontario conditions were completed. Test slabs were also constructed to simulate climatic changes by running freeze-thaw cycles based on weather data over the past ten years.
Three field test sections located in the Town of Markham and one at the CPATT Test Track were monitored and assessed under as part of the research. Regular pavement condition assessments were carried out on all the test sections by performing non-destructive tests using a Portable Falling Weight Deflectometer (PFWD) and distress survey in accordance with the Ministry of Transportation (MTO) guidelines. The CPATT Test Track was evaluated with both the PFWD and surface distresses, whereas only distress surveys were performed on the three residential streets in the Town of Markham. The evaluations demonstrated that the pavements were in good conditions throughout the monitoring period of the research (four years for the three residential streets in the Town of Markham and…
Subjects/Keywords: Recycled Asphalt Shingles; Flexible Pavements; Ontario Hot Mix
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APA (6th Edition):
Ddamba, S. J. (2011). Evaluation of the Effect of Recycled Asphalt Shingles on Ontario Hot Mix Pavement. (Thesis). University of Waterloo. Retrieved from http://hdl.handle.net/10012/6285
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Ddamba, Shirley Jacqueline. “Evaluation of the Effect of Recycled Asphalt Shingles on Ontario Hot Mix Pavement.” 2011. Thesis, University of Waterloo. Accessed March 04, 2021.
http://hdl.handle.net/10012/6285.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Ddamba, Shirley Jacqueline. “Evaluation of the Effect of Recycled Asphalt Shingles on Ontario Hot Mix Pavement.” 2011. Web. 04 Mar 2021.
Vancouver:
Ddamba SJ. Evaluation of the Effect of Recycled Asphalt Shingles on Ontario Hot Mix Pavement. [Internet] [Thesis]. University of Waterloo; 2011. [cited 2021 Mar 04].
Available from: http://hdl.handle.net/10012/6285.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Ddamba SJ. Evaluation of the Effect of Recycled Asphalt Shingles on Ontario Hot Mix Pavement. [Thesis]. University of Waterloo; 2011. Available from: http://hdl.handle.net/10012/6285
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Canterbury
13.
Stubbs, Anthony Pooley.
Fatigue Behaviour of Hot Mix Asphalt for New Zealand Pavement Design.
Degree: M. Eng., Civil Engineering, 2011, University of Canterbury
URL: http://dx.doi.org/10.26021/1768
► Asphalt’s fatigue and modulus characteristics play an important role in pavement design. Ultimately they govern the required thickness of asphalt to structurally support heavy vehicles.…
(more)
▼ Asphalt’s fatigue and modulus characteristics play an important role in pavement design. Ultimately they govern the required thickness of asphalt to structurally support heavy vehicles. The thickness of the asphalt layer is a major contributor to the cost of construction. In New Zealand, the design of structural asphalt layers has been a problem for some time and gives rise to two areas of concern. First, the present fatigue failure criterion, the Shell fatigue transfer function, which has been adopted from overseas, not only underestimates the fatigue life of the country’s asphalts, but does not accurately characterise the fatigue behaviour of our local asphalt mixes. Consequently, asphalt thicknesses are overdesigned. Second, asphalt’s fatigue behaviour is influenced by numerous factors and therefore can be difficult to characterise. The primary objective of this thesis is to develop fatigue and modulus models, by carrying out fatigue and modulus tests, to characterise the behaviour of two typical New Zealand structural asphalts. Both resilient and stiffness moduli tests were performed at a range of temperatures and loading rates developing moduli master curves, which predict the asphalt’s modulus for any pavement temperature and vehicle speed. A general full factorial experiment was carried out utilising the four-point flexural beam fatigue test. Tests were carried out at different strain levels, temperatures, and loading rates. An analysis of variance showed that the impacts of strain amplitude, temperature, binder type, the interaction of strain amplitude and temperature, and the interaction of strain amplitude and binder type have a significant effect on fatigue behaviour. The developed models, which account for temperature effects give the pavement engineer the ability to undergo a more accurate assessment of fatigue damage than at present for different climatic temperatures demonstrated by using an incremental damage analysis approach. The research shows that with such characterisation for the given pavement’s design life, thinner and less expensive roads can be constructed in New Zealand.
Subjects/Keywords: fatigue cracking; factorial design; factors; hot mix asphalt; pavement design
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to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Stubbs, A. P. (2011). Fatigue Behaviour of Hot Mix Asphalt for New Zealand Pavement Design. (Masters Thesis). University of Canterbury. Retrieved from http://dx.doi.org/10.26021/1768
Chicago Manual of Style (16th Edition):
Stubbs, Anthony Pooley. “Fatigue Behaviour of Hot Mix Asphalt for New Zealand Pavement Design.” 2011. Masters Thesis, University of Canterbury. Accessed March 04, 2021.
http://dx.doi.org/10.26021/1768.
MLA Handbook (7th Edition):
Stubbs, Anthony Pooley. “Fatigue Behaviour of Hot Mix Asphalt for New Zealand Pavement Design.” 2011. Web. 04 Mar 2021.
Vancouver:
Stubbs AP. Fatigue Behaviour of Hot Mix Asphalt for New Zealand Pavement Design. [Internet] [Masters thesis]. University of Canterbury; 2011. [cited 2021 Mar 04].
Available from: http://dx.doi.org/10.26021/1768.
Council of Science Editors:
Stubbs AP. Fatigue Behaviour of Hot Mix Asphalt for New Zealand Pavement Design. [Masters Thesis]. University of Canterbury; 2011. Available from: http://dx.doi.org/10.26021/1768
Virginia Tech
14.
Diefenderfer, Stacey D.
Investigation of Fatigue Properties of Superpave HMA at the Virginia Smart Road.
Degree: PhD, Civil Engineering, 2009, Virginia Tech
URL: http://hdl.handle.net/10919/29538
► This study investigated the influence of material properties on fatigue life through laboratory fatigue testing of eleven Superpave hot mix asphalt (HMA) mixtures in use…
(more)
▼ This study investigated the influence of material properties on fatigue life through laboratory fatigue testing of eleven Superpave
hot mix asphalt (HMA) mixtures in use at the Virginia Smart Road. Mixtures were sampled from the plant and produced in the laboratory to investigate the influence of production method. Specimens were cut from the in-situ pavement and compacted in the laboratory to evaluate the influence of compaction method. Third point beam fatigue testing was performed at 25ºC and 10Hz. Additional testing at frequencies of 1 Hz and 5Hz, and at 10 Hz including rest periods of 0.4sec and 0.9sec were performed for one mixture to explore the impact of frequency and rest periods. Analyses were performed on the strain-life relationships and predicted endurance strain limits for the mixtures.
Investigation of strain-life relationships for several mixtures indicated that small differences in mixture volumetrics due to the production method have minimal impact on the laboratory fatigue performance of HMA. Comparisons of expected fatigue performance for one mixture indicated that shorter fatigue lives (under the same strain conditions) may be expected for laboratory-compacted specimens when compared to field-compacted specimens, despite visual observation of damage (surface cracking) in the field-compacted specimens. Testing performed on one mixture to determine the influence of different loading frequencies showed that fatigue life was independent of the requencies tested. Investigation of rest period inclusion indicated no differences in fatigue life for loading conducted at 10 Hz frequency and no rest period, 0.4sec rest period, or 0.9sec rest period. The evaluation of specimens cut from the in-situ pavement indicated that location within the lane and orientation did not significantly affect laboratory fatigue performance. The effect of aggregate size was considered; however, results were inconclusive. Using predictive strain-life fatigue equations, the benefits of polymer-modification of binders and use of SMA were shown for mixtures produced in the laboratory according to the job
mix formula and to match the plant-produced volumetrics. Evaluation of the predicted fatigue strain endurance limit was performed using an energy-based and an empirical method. The energy method was shown to estimate significantly higher endurance limit strains for mixtures.
Advisors/Committee Members: Trani, Antoino A. (committee member), Loulizi, Amara (committee member), Case, Scott W. (committee member), Flintsch, Gerardo W. (committeecochair), Al-Qadi, Imadeddin L. (committeecochair).
Subjects/Keywords: Superpave; hot mix asphalt; fatigue
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Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Diefenderfer, S. D. (2009). Investigation of Fatigue Properties of Superpave HMA at the Virginia Smart Road. (Doctoral Dissertation). Virginia Tech. Retrieved from http://hdl.handle.net/10919/29538
Chicago Manual of Style (16th Edition):
Diefenderfer, Stacey D. “Investigation of Fatigue Properties of Superpave HMA at the Virginia Smart Road.” 2009. Doctoral Dissertation, Virginia Tech. Accessed March 04, 2021.
http://hdl.handle.net/10919/29538.
MLA Handbook (7th Edition):
Diefenderfer, Stacey D. “Investigation of Fatigue Properties of Superpave HMA at the Virginia Smart Road.” 2009. Web. 04 Mar 2021.
Vancouver:
Diefenderfer SD. Investigation of Fatigue Properties of Superpave HMA at the Virginia Smart Road. [Internet] [Doctoral dissertation]. Virginia Tech; 2009. [cited 2021 Mar 04].
Available from: http://hdl.handle.net/10919/29538.
Council of Science Editors:
Diefenderfer SD. Investigation of Fatigue Properties of Superpave HMA at the Virginia Smart Road. [Doctoral Dissertation]. Virginia Tech; 2009. Available from: http://hdl.handle.net/10919/29538
Virginia Tech
15.
Harris, Christopher Holt.
Hot Mix Asphalt Permeability: Tester Size Effects and Anisotropy.
Degree: MS, Civil Engineering, 2007, Virginia Tech
URL: http://hdl.handle.net/10919/35848
► Permeability of hot mix asphalt (HMA) is a property that is important to the pavementâ s durability. Measuring permeability along with density will give a…
(more)
▼ Permeability of
hot mix asphalt (HMA) is a property that is important to the pavementâ s durability. Measuring permeability along with density will give a better indication of a pavementâ s durability than density alone. The presence of water for extended periods of time in the pavement is directly linked to early deterioration.
The first goal of this research is to study the anisotropic nature of
hot mix asphalt permeability within the lab, which required the development of a horizontal permeameter. This method is inexpensive and suitable for a lab technician to use and analyze. A series of samples with different air void contents were used to observe how the ratio of vertical to horizontal permeability changes with air void content.
The second goal was to develop a modified field permeameter to study the water-pavement contact area effect on field permeability. A reliable sealing system was created that is consistent and is not detrimental to the pavement surface. The results of the study show that larger contact areas yield increasing influence of vertical flow, which represents the one dimensional assumption of Darcyâ s Law falling head method.
The third goal was to validate the results by simulating the field permeability test with a finite element model. A number of simulations with different permeability values and anisotropic permeability ratios were conducted. The horizontal and vertical flows were observed within the test area to analyze the flow pattern and influence of the directional permeability. The results matched the trends found in the field permeability study.
Advisors/Committee Members: Wang, Linbing (committeechair), Filz, George M. (committee member), Flintsch, Gerardo W. (committee member).
Subjects/Keywords: permeability; anisotropy; hot mix asphalt
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APA (6th Edition):
Harris, C. H. (2007). Hot Mix Asphalt Permeability: Tester Size Effects and Anisotropy. (Masters Thesis). Virginia Tech. Retrieved from http://hdl.handle.net/10919/35848
Chicago Manual of Style (16th Edition):
Harris, Christopher Holt. “Hot Mix Asphalt Permeability: Tester Size Effects and Anisotropy.” 2007. Masters Thesis, Virginia Tech. Accessed March 04, 2021.
http://hdl.handle.net/10919/35848.
MLA Handbook (7th Edition):
Harris, Christopher Holt. “Hot Mix Asphalt Permeability: Tester Size Effects and Anisotropy.” 2007. Web. 04 Mar 2021.
Vancouver:
Harris CH. Hot Mix Asphalt Permeability: Tester Size Effects and Anisotropy. [Internet] [Masters thesis]. Virginia Tech; 2007. [cited 2021 Mar 04].
Available from: http://hdl.handle.net/10919/35848.
Council of Science Editors:
Harris CH. Hot Mix Asphalt Permeability: Tester Size Effects and Anisotropy. [Masters Thesis]. Virginia Tech; 2007. Available from: http://hdl.handle.net/10919/35848
Curtin University of Technology
16.
Valenzuela, Wilfredo.
Variability in the determination of bulk and maximum density of hot mix asphalt
.
Degree: 2011, Curtin University of Technology
URL: http://hdl.handle.net/20.500.11937/2264
► Roads are a vital link, in particular in a country like Australia where distances are extensive. Western Australia is no exception, with Main Roads, Western…
(more)
▼ Roads are a vital link, in particular in a country like Australia where distances are extensive. Western Australia is no exception, with Main Roads, Western Australia„s State road authority, managing more than 17,800 kilometres of highways and state roads with a large local government road network of almost 164,000 kilometres (Main Roads Western Australia 2011). For quality control measures, Main Roads Western Australia (MRWA) requires quantification of the variability of test methods to establish accepted parameters, and minimum and maximum air voids for the construction of dense-graded hot mix asphalt concrete. This is done to ensure correct design and quality control of the pavement, and to avoid the prospect of distress that could affect the expected service-life of the hot mix. Western Australia currently uses the Marshall method for hot mix asphalt design which is proven in the production of quality hot mix asphalt and from which long lasting pavement can be constructed. This method has been in use around the world for over 60 years.High quality and specific percentages of aggregates are then required for the durability and quality of the road. Therefore, the accuracy of the measurements of asphalt density hence the results are essential for the acceptance of the product. Payments are dependent on whether or not a certain asphalt density quality has been achieved. One form to measure this quality is by testing the volumetric properties of asphalt. However, it has been noticed in previous results that a high percentage of variability in the bulk and maximum density of the hot mix are present. This variability as a result have produced one of the major concerns in the asphalt hot mix industry, this is having a reliable density determination of compacted hot mix samples.Consequently, this research aimed to examine the possible cause/s of the differences in density determination of dense-graded hot mix asphalt concrete. This translated into a thorough evaluation of previous test results, performed through proficiency and inter-laboratory testing. Investigation and evaluation of the current methods specifically focused on temperature testing and the testing and analysis of the possible causes of variability in the determination of bulk density. Extensive testing was conducted, using MRWA standard methods to measure asphalt density. This involved observing and replicating the methodology established for standard methods. There was a modification to the method for the determination of maximum density and this will be discussed in the report. These factors were considered to be crucial in order to make a significant contribution to promoting and improving standardisation across the industry, and to ensure reliability and consistency in the determination of asphalt density, both bulk and maximum.
Subjects/Keywords: differences in density determination;
bulk density;
hot mix asphalt;
maximum density
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APA ·
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Export
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APA (6th Edition):
Valenzuela, W. (2011). Variability in the determination of bulk and maximum density of hot mix asphalt
. (Thesis). Curtin University of Technology. Retrieved from http://hdl.handle.net/20.500.11937/2264
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Valenzuela, Wilfredo. “Variability in the determination of bulk and maximum density of hot mix asphalt
.” 2011. Thesis, Curtin University of Technology. Accessed March 04, 2021.
http://hdl.handle.net/20.500.11937/2264.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Valenzuela, Wilfredo. “Variability in the determination of bulk and maximum density of hot mix asphalt
.” 2011. Web. 04 Mar 2021.
Vancouver:
Valenzuela W. Variability in the determination of bulk and maximum density of hot mix asphalt
. [Internet] [Thesis]. Curtin University of Technology; 2011. [cited 2021 Mar 04].
Available from: http://hdl.handle.net/20.500.11937/2264.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Valenzuela W. Variability in the determination of bulk and maximum density of hot mix asphalt
. [Thesis]. Curtin University of Technology; 2011. Available from: http://hdl.handle.net/20.500.11937/2264
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Addis Ababa University
17.
Asres, Simeneh.
THE EFFECT OF HYDRATED LIME ADDITIVES ON MOISTURE SENSITIVITY AND OVERALL PERFORMANCE OF HOT MIX ASPHALT MIXTURES
.
Degree: 2014, Addis Ababa University
URL: http://etd.aau.edu.et/dspace/handle/123456789/4135
► Well-designed asphalt mixtures can be expected to serve successfully for many years under a variety of loading and environmental conditions. However, Stripping is one of…
(more)
▼ Well-designed
asphalt mixtures can be expected to serve successfully for many years under a variety of loading and environmental conditions. However, Stripping is one of the common types of pavement failure found in asphaltic pavements. Besides high traffic impact stress, climatic factor such as temperature and moisture have also profound effect on the durability of
hot mix asphalt pavements. One of this research’s goal is to evaluate and compare the stripping performance of unmodified and lime modified
hot mix asphalt using two different types of lime application.
The research study utilized laboratory evaluations to study effects of hydrated lime additive on moisture susceptibility and important physical properties of
Hot Mix Asphalt mixtures. The evaluation involved six
mix designs from two aggregate sources and one bitumen source. Out of the six, two are used as control and the other four are checked for the advantages of hydrated lime additives.
Laboratory testing was accomplished in the first phase with the production of Marshall compacted specimens to determine the performance of
Hot Mix Asphalt using Marshall
Mix design methods and parameters such as air voids, voids in mineral aggregate, voids filled with
asphalt cement, Marshall Stability and flow are measured. The result shows superior advantage on hydrated lime additive on stability and other important physical properties of
Hot Mix Asphalt. Beside this, the optimum
asphalt content is determined for phase two test.
For the selected optimum bitumen content on the second phase, six samples from each
mix were prepared to conduct the moisture susceptibility test. Three of the six samples are conditioned with saturation and freeze-thaw cycles and the other three were unconditioned. Finally the tensile strength test for each group was conducted. The tensile strength ratio according to AASHTO T 283 proved that that hydrated lime additive has an advantage on moisture susceptibility
The research concludes that adding hydrated lime in
Hot Mix Asphalt improves the performance of mixtures and increases the life of highways. Furthermore, both dry lime and lime slurry hydrated lime application methods used in this research have good results compared with the unmodified samples.
Advisors/Committee Members: Dr. Bikila Teklu (advisor).
Subjects/Keywords: Hot Mix Asphalt;
Moisture damage;
Moisture susceptibility;
Anti-strip additives;
Marshall Mix design
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APA ·
Chicago ·
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CSE |
Export
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APA (6th Edition):
Asres, S. (2014). THE EFFECT OF HYDRATED LIME ADDITIVES ON MOISTURE SENSITIVITY AND OVERALL PERFORMANCE OF HOT MIX ASPHALT MIXTURES
. (Thesis). Addis Ababa University. Retrieved from http://etd.aau.edu.et/dspace/handle/123456789/4135
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Asres, Simeneh. “THE EFFECT OF HYDRATED LIME ADDITIVES ON MOISTURE SENSITIVITY AND OVERALL PERFORMANCE OF HOT MIX ASPHALT MIXTURES
.” 2014. Thesis, Addis Ababa University. Accessed March 04, 2021.
http://etd.aau.edu.et/dspace/handle/123456789/4135.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Asres, Simeneh. “THE EFFECT OF HYDRATED LIME ADDITIVES ON MOISTURE SENSITIVITY AND OVERALL PERFORMANCE OF HOT MIX ASPHALT MIXTURES
.” 2014. Web. 04 Mar 2021.
Vancouver:
Asres S. THE EFFECT OF HYDRATED LIME ADDITIVES ON MOISTURE SENSITIVITY AND OVERALL PERFORMANCE OF HOT MIX ASPHALT MIXTURES
. [Internet] [Thesis]. Addis Ababa University; 2014. [cited 2021 Mar 04].
Available from: http://etd.aau.edu.et/dspace/handle/123456789/4135.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Asres S. THE EFFECT OF HYDRATED LIME ADDITIVES ON MOISTURE SENSITIVITY AND OVERALL PERFORMANCE OF HOT MIX ASPHALT MIXTURES
. [Thesis]. Addis Ababa University; 2014. Available from: http://etd.aau.edu.et/dspace/handle/123456789/4135
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
18.
Gigante, Antonio Carlos.
Avaliação da susceptibilidade térmica e do efeito das condições ambientais no enrijecimento de misturas asfálticas densas à luz de seus comportamentos resilientes.
Degree: Mestrado, Infra-Estrutura de Transportes, 2007, University of São Paulo
URL: http://www.teses.usp.br/teses/disponiveis/18/18143/tde-19032008-135756/
;
► Este trabalho teve como objetivo avaliar o módulo de resiliência de misturas asfálticas densas sob duas condições. A primeira foi o estudo dos efeitos do…
(more)
▼ Este trabalho teve como objetivo avaliar o módulo de resiliência de misturas asfálticas densas sob duas condições. A primeira foi o estudo dos efeitos do enrijecimento de misturas asfálticas densas em condições ambientais diferentes (cinco condições) que são: AAAL (ao ar e à luz), AASL (ao ar e sem luz), AVAL (baixa pressão atmosférica e à luz), AVSL (baixa pressão atmosférica e sem luz) e CLIMA (ao clima e intempéries), tendo sido utilizados para este experimento CAP 20, centro da faixa C do DNER como distribuição granulométrica e preparados segundo a AASHTO PP2. Neste estudo concluiu-se que não houve efeito significativo da exposição da luz artificial nas condições AL e SL, assim como não houve, também, efeito significativo na variação do módulo de resiliência nas condições de exposição ou não ao ar (AV e AA); nas demais condições houve melhora significativa nos resultados. Na segunda parte foram avaliados os efeitos de alguns fatores na susceptibilidade térmica de misturas asfálticas densas: tipo de agregado (basalto, gabro e granito), tipo de asfalto (CAP 20 e CAP 40), teor de asfalto (5%, 5,5% e 6%), presença de aditivo (com e sem cal) e temperaturas de ensaio (10ºC, 25ºC e 40ºC). Todos os corpos-de-prova foram preparados segundo procedimento da AASHTO PP2. Na segunda parte do experimento, concluiu-se que o CAP 40 produziu valores médios de Vv superiores aos do CAP 20, as misturas com teor de 5,5% apresentaram maior resistência à tração a 25°C, o módulo de resiliência e a relação MR/RT diminuem com o aumento do teor de CAP.
This work intended to evaluate the resilient modulus of dense-graded hot-mix asphalt under two conditions. The first condition comprehends a study of the hardening effects of densegraded hot mix asphalt submitted to five environmental conditions: AAAL (air and artificial light), AASL (air and no artificial light), AVAL (low atmospheric pressure and artificial light), AVSL (low atmospheric pressure and no artificial light) and CLIMA (exposition to intemperism). In this phase, it was used an AC-20 asphalt binder and DNER middle band \"Cäs aggregate\'s particles size distribution. Specimens were prepared according to AASHTO PP2. Based on the results of the first part of the experiment, it was concluded that there was no significant effect of the artificial light exposition on AL and SL conditions, as well as on the variation of resilient modulus under air conditions (AV and AA). The other conditions presented better performance results. The second part of the experiment aimed to evaluating the effect of some factors in the thermal susceptibility of dense-graded HMA, that are: aggregate type (basalt, gabbro, granite), asphalt type (AC-20 and AC-40), binder content (5,0%, 5,5% and 6,0%), presence of additive (with or without lime) and test temperature (10ºC, 25ºC and 40ºC). As in the first part of the experiment, all specimens were prepared according to AASHTO PP2. Results of the second part of the experiment led to the following conclusions: mixtures using AC-40 showed average air voids…
Advisors/Committee Members: Fabbri, Glauco Túlio Pessa.
Subjects/Keywords: Asfalto; Asphalt; Condições ambientais; Environmental conditions; Hot-mix asphalt mixes; Hot-mix asphalt with lime; Misturas asfálticas; Misturas asfálticas com cal; Módulo de resiliência; Pavement; Pavimento; Resilient modulus
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APA ·
Chicago ·
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CSE |
Export
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Manager
APA (6th Edition):
Gigante, A. C. (2007). Avaliação da susceptibilidade térmica e do efeito das condições ambientais no enrijecimento de misturas asfálticas densas à luz de seus comportamentos resilientes. (Masters Thesis). University of São Paulo. Retrieved from http://www.teses.usp.br/teses/disponiveis/18/18143/tde-19032008-135756/ ;
Chicago Manual of Style (16th Edition):
Gigante, Antonio Carlos. “Avaliação da susceptibilidade térmica e do efeito das condições ambientais no enrijecimento de misturas asfálticas densas à luz de seus comportamentos resilientes.” 2007. Masters Thesis, University of São Paulo. Accessed March 04, 2021.
http://www.teses.usp.br/teses/disponiveis/18/18143/tde-19032008-135756/ ;.
MLA Handbook (7th Edition):
Gigante, Antonio Carlos. “Avaliação da susceptibilidade térmica e do efeito das condições ambientais no enrijecimento de misturas asfálticas densas à luz de seus comportamentos resilientes.” 2007. Web. 04 Mar 2021.
Vancouver:
Gigante AC. Avaliação da susceptibilidade térmica e do efeito das condições ambientais no enrijecimento de misturas asfálticas densas à luz de seus comportamentos resilientes. [Internet] [Masters thesis]. University of São Paulo; 2007. [cited 2021 Mar 04].
Available from: http://www.teses.usp.br/teses/disponiveis/18/18143/tde-19032008-135756/ ;.
Council of Science Editors:
Gigante AC. Avaliação da susceptibilidade térmica e do efeito das condições ambientais no enrijecimento de misturas asfálticas densas à luz de seus comportamentos resilientes. [Masters Thesis]. University of São Paulo; 2007. Available from: http://www.teses.usp.br/teses/disponiveis/18/18143/tde-19032008-135756/ ;
Louisiana State University
19.
Ying, Hao.
Using X-Ray Computed Tomography to Quantify Damage of Hot-Mix Asphalt in the Dynamic Complex Modulus and Flow Number Tests.
Degree: MSCE, Civil and Environmental Engineering, 2011, Louisiana State University
URL: etd-06292011-163239
;
https://digitalcommons.lsu.edu/gradschool_theses/675
► The dynamic modulus test is conducted based on the assumption that no damage is induced during the testing process and that measurements are conducted within…
(more)
▼ The dynamic modulus test is conducted based on the assumption that no damage is induced during the testing process and that measurements are conducted within the linear viscoelastic region. In addition, significant damage is expected to occur during the flow number test process. While these assumptions are well-defined, the levels of damage taking place during these tests have not been quantified. The objectives of this study were to quantify the levels of damage in the dynamic complex modulus and flow number tests using x-ray computed tomography (CT) and to characterize the microstructural properties of asphalt mixtures under loading. Four Superpave mixtures including one conventional hot-mix asphalt (HMA) and three warm-mix asphalt (WMA) mixes were evaluated in this study. Two WMA processes (i.e., water foaming and RedisetTM additive) were used in the preparation of the WMA mixes. In addition, reclaimed asphalt pavement (RAP) was used in the preparation of the mixes at a content ranging from 15 to 30%. Results of the experimental program indicated that the damage taking place in the dynamic modulus test is minimal and homogeneous while the damage taking place in the flow number test is significant and heterogeneous. In addition, specimen preparation may significantly influence the three-dimensional air voids distribution in HMA.
Subjects/Keywords: FLOW NUMBER; COMPLEX MODULUS; HOT-MIX ASPHALT; DAMAGE; X-RAY COMPUTED TOMOGRAPHY
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APA ·
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Export
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APA (6th Edition):
Ying, H. (2011). Using X-Ray Computed Tomography to Quantify Damage of Hot-Mix Asphalt in the Dynamic Complex Modulus and Flow Number Tests. (Masters Thesis). Louisiana State University. Retrieved from etd-06292011-163239 ; https://digitalcommons.lsu.edu/gradschool_theses/675
Chicago Manual of Style (16th Edition):
Ying, Hao. “Using X-Ray Computed Tomography to Quantify Damage of Hot-Mix Asphalt in the Dynamic Complex Modulus and Flow Number Tests.” 2011. Masters Thesis, Louisiana State University. Accessed March 04, 2021.
etd-06292011-163239 ; https://digitalcommons.lsu.edu/gradschool_theses/675.
MLA Handbook (7th Edition):
Ying, Hao. “Using X-Ray Computed Tomography to Quantify Damage of Hot-Mix Asphalt in the Dynamic Complex Modulus and Flow Number Tests.” 2011. Web. 04 Mar 2021.
Vancouver:
Ying H. Using X-Ray Computed Tomography to Quantify Damage of Hot-Mix Asphalt in the Dynamic Complex Modulus and Flow Number Tests. [Internet] [Masters thesis]. Louisiana State University; 2011. [cited 2021 Mar 04].
Available from: etd-06292011-163239 ; https://digitalcommons.lsu.edu/gradschool_theses/675.
Council of Science Editors:
Ying H. Using X-Ray Computed Tomography to Quantify Damage of Hot-Mix Asphalt in the Dynamic Complex Modulus and Flow Number Tests. [Masters Thesis]. Louisiana State University; 2011. Available from: etd-06292011-163239 ; https://digitalcommons.lsu.edu/gradschool_theses/675
Universidade do Rio Grande do Sul
20.
Reis, Rafael Marçal Martins de.
Investigação de campo e laboratório sobre revestimento asfáltico ultra delgado.
Degree: 2012, Universidade do Rio Grande do Sul
URL: http://hdl.handle.net/10183/75877
► Na década de 1970, foi adotado para o projeto de pavimentos na França o princípio da “dissociação de funções das camadas do revestimento”. Principalmente foram…
(more)
▼ Na década de 1970, foi adotado para o projeto de pavimentos na França o princípio da “dissociação de funções das camadas do revestimento”. Principalmente foram destacados os parâmetros funcionais de conforto, segurança e redução do ruído à camada de rolamento/desgaste e estabelecidos maiores requisitos estruturais para as camadas subjacentes do pavimento. Destacam-se pelo seu uso corrente na França, Inglaterra, Alemanha, Espanha e EUA, para a camada de rolamento em vias de tráfego intenso e/ou pesado, os revestimentos asfálticos delgados e ultra delgados, produzidos e aplicados a quente, envolvendo o emprego de misturas com graduação descontínua. Essas misturas são empregadas principalmente para proteger a estrutura do pavimento e proporcionar maior segurança, qualidade de rolamento e redução do ruído do tráfego, isto é, preservar/melhorar a funcionalidade da rodovia, cabendo às camadas subjacentes do pavimento desempenhar adequadamente a função estrutural para resistir às cargas de tráfego. Esta pesquisa apresenta os procedimentos executivos de laboratório e de campo, bem como os resultados do estudo de dosagem e ao monitoramento das características funcionais de um revestimento asfáltico ultra delgado, composto por uma mistura asfáltica descontínua a quente e uma membrana elástica, num trecho experimental em rodovia de alto tráfego no Sul do Brasil. O estudo demonstra que a técnica pode ser utilizada no país para melhorar as condições superficiais do revestimento asfáltico em relação à segurança da via e redução de ruídos causados pelo tráfego ao meio ambiente.
In the 1970s, it was adopted for the design of pavements in France the concept of "separation of functions of wearing courses". Especially prominent were the functional parameters of comfort, safety and noise reduction for wearing courses and greater structural requirements established for the underlying layers of the pavement. For high-traffic highway wearing courses stand out for its current use in France, England, Germany, Spain and the U.S. thin and ultrathin gap-graded hot-mix asphalt. Such mixtures are used primarily to protect the pavement structure and provide greater safety, rolling quality and traffic noise reduction that is, to preserve / enhance the functionality of the highway, leaving the underlying layers of the pavement adequately perform the structural function to resist to traffic loads. The study presents lab and job executive procedures as well as results of mixing asphalt dosage design and monitoring related to the functional characteristics of an ultra-thin hot asphalt wearing course, consisting of a gap-graded asphalt mixture and an elastic membrane, carried out in a high-traffic highway trial. The survey shows that the technique can be used in Brazilian roads to improve the wearing course conditions regarding road safety and traffic noise reduction to the environment.
Advisors/Committee Members: Ceratti, Jorge Augusto Pereira.
Subjects/Keywords: Pavement; Pavimentação; Ensaios (Engenharia); Asphalt mixes; Dosagem de concreto; Ultrathin hot-mix asphalt wearing course; Misturas asfálticas; Concreto asfáltico
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APA ·
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Export
to Zotero / EndNote / Reference
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APA (6th Edition):
Reis, R. M. M. d. (2012). Investigação de campo e laboratório sobre revestimento asfáltico ultra delgado. (Thesis). Universidade do Rio Grande do Sul. Retrieved from http://hdl.handle.net/10183/75877
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Reis, Rafael Marçal Martins de. “Investigação de campo e laboratório sobre revestimento asfáltico ultra delgado.” 2012. Thesis, Universidade do Rio Grande do Sul. Accessed March 04, 2021.
http://hdl.handle.net/10183/75877.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Reis, Rafael Marçal Martins de. “Investigação de campo e laboratório sobre revestimento asfáltico ultra delgado.” 2012. Web. 04 Mar 2021.
Vancouver:
Reis RMMd. Investigação de campo e laboratório sobre revestimento asfáltico ultra delgado. [Internet] [Thesis]. Universidade do Rio Grande do Sul; 2012. [cited 2021 Mar 04].
Available from: http://hdl.handle.net/10183/75877.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Reis RMMd. Investigação de campo e laboratório sobre revestimento asfáltico ultra delgado. [Thesis]. Universidade do Rio Grande do Sul; 2012. Available from: http://hdl.handle.net/10183/75877
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Universidade do Rio Grande do Sul
21.
Colpo, Gracieli Bordin.
Análise de fadiga de misturas asfálticas através do ensaio de flexão em viga quatro pontos.
Degree: 2014, Universidade do Rio Grande do Sul
URL: http://hdl.handle.net/10183/114463
► O fenômeno de fadiga é caracterizado pela deterioração estrutural que um material está sujeito quando submetido a um estado de tensões e de deformações repetidas,…
(more)
▼ O fenômeno de fadiga é caracterizado pela deterioração estrutural que um material está sujeito quando submetido a um estado de tensões e de deformações repetidas, resultando assim, em um trincamento do pavimento, que pode até culminar na sua ruptura após um número suficiente de repetições de carregamento. Este processo é considerado como sendo a perda de resistência do material quando solicitado por uma carga repetida. Conhecer a resistência à fadiga de misturas asfálticas torna-se relevante para a formulação das misturas, para o dimensionamento de uma estrutura ou para a escolha de uma adequada solução em uma obra de recuperação do pavimento de uma rodovia. O ensaio laboratorial mais utilizado no Brasil para analisar a fadiga de misturas é o de tração indireta por compressão diametral em corpos de prova cilíndricos, contudo este ensaio apresenta algumas variáveis que diferenciam os resultados obtidos em laboratório com a realidade apresentada em campo. Neste sentido, o presente trabalho analisou o comportamento à fadiga, através do ensaio de flexão em viga quatro pontos, de duas misturas asfálticas: concreto asfáltico com ligante modificado por polímero (COMPAFLEX 60/85) e concreto asfáltico com ligante modificado por polímero e adição de TLA (CAP TLA FLEX). Para obter as vigas de mistura asfáltica optou-se por utilizar uma metodologia de moldagem e compactação das placas em uma usina de asfalto. Após este processo as placas foram serradas para obtenção das vigas nos tamanhos definidos, sendo estas amostras ensaiadas para verificação da densidade aparente e grau de compactação. Com o intuito de atingir o objetivo proposto foram realizados ensaios de fadiga à flexão em quatro pontos, sob modo de carregamento à deformação e tensão controlada, ensaios de fadiga por compressão diametral (tensão controlada) e ensaios de resistência à tração, sendo estes realizados à temperatura de 25°C. Também foi determinado o módulo dinâmico das misturas estudadas para as temperaturas de 15°C, 20°C e 25°C. Os resultados obtidos demonstram que a metodologia escolhida para a moldagem e compactação das placas foi adequada, pois as amostras apresentaram valores de volume de vazios, densidade aparente e grau de compactação semelhantes aos estabelecidos nos projetos das misturas. Em relação aos resultados obtidos nos ensaios de fadiga por compressão diametral a mistura CA-TLA obteve valores de vida de fadiga superiores em relação à mistura CA-E, enquanto no ensaio de flexão em quatro pontos, à deformação controlada, a mistura CA-E apresentou maiores vidas de fadiga. Os resultados dos ensaios de módulo dinâmico das misturas CA-TLA e CA-E foram apresentados através das representações clássicas nas curvas isotérmica, frequência‐temperatura, isócrona, espaço de Black e plano cole‐cole, mostrando que a mistura CA-TLA apresentou maior rigidez em relação a mistura CA-E.
The phenomenon of fatigue is characterized by structural deterioration when a material is subjected to a state of repeated stress and strain cycles, thus resulting in cracking…
Advisors/Committee Members: Ceratti, Jorge Augusto Pereira.
Subjects/Keywords: Fatigue; Pavimentos; Asphalt mixtures; Misturas asfálticas; Ensaios de fadiga; Hot mix asphalt; Four point bending test; Dynamic module
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APA (6th Edition):
Colpo, G. B. (2014). Análise de fadiga de misturas asfálticas através do ensaio de flexão em viga quatro pontos. (Thesis). Universidade do Rio Grande do Sul. Retrieved from http://hdl.handle.net/10183/114463
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Colpo, Gracieli Bordin. “Análise de fadiga de misturas asfálticas através do ensaio de flexão em viga quatro pontos.” 2014. Thesis, Universidade do Rio Grande do Sul. Accessed March 04, 2021.
http://hdl.handle.net/10183/114463.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Colpo, Gracieli Bordin. “Análise de fadiga de misturas asfálticas através do ensaio de flexão em viga quatro pontos.” 2014. Web. 04 Mar 2021.
Vancouver:
Colpo GB. Análise de fadiga de misturas asfálticas através do ensaio de flexão em viga quatro pontos. [Internet] [Thesis]. Universidade do Rio Grande do Sul; 2014. [cited 2021 Mar 04].
Available from: http://hdl.handle.net/10183/114463.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Colpo GB. Análise de fadiga de misturas asfálticas através do ensaio de flexão em viga quatro pontos. [Thesis]. Universidade do Rio Grande do Sul; 2014. Available from: http://hdl.handle.net/10183/114463
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
22.
Bardini, Vivian Silveira dos Santos.
Influência do fíler mineral em propriedades de misturas asfálticas densas.
Degree: PhD, Infra-Estrutura de Transportes, 2013, University of São Paulo
URL: http://www.teses.usp.br/teses/disponiveis/18/18143/tde-17052013-090958/
;
► Esta pesquisa tem por objetivo contribuir para o melhor entendimento dos efeitos do fíler mineral sobre o comportamento mecânico de misturas asfálticas densas, particularmente em…
(more)
▼ Esta pesquisa tem por objetivo contribuir para o melhor entendimento dos efeitos do fíler mineral sobre o comportamento mecânico de misturas asfálticas densas, particularmente em relação ao tipo e teor de fíler. O comportamento mecânico de misturas asfálticas densas foi avaliado em função do tipo e teor de fíler (diferentes propriedades físicas, geométricas, mineralógica e comportamento físico-químico), do tipo de agregado (diferentes origens mineralógicas) e do tipo de ligante asfáltico (diferentes consistências). Para alcançar o objetivo geral, a pesquisa foi dividida em três partes: o estudo da mistura asfáltica completa, através de ensaios mecânicos; o estudo do mástique, resultante da mistura de fíler com ligante asfáltico, através dos ensaios comumente aplicados aos ligantes asfálticos puros; e o estudo do comportamento de trincamento dos mástiques nas temperaturas intermediárias, através das características de energia fratura. A análise de variância dos resultados auxiliou na identificação dos fatores com influência significativa nas propriedades apresentadas pelas misturas e mástiques asfálticos. Quanto aos resultados de vida de fadiga, as misturas asfálticas compostas com cal hidratada apresentaram as maiores vidas de fadiga e quanto maior o teor de fíler, maior a vida de fadiga. Em relação à deformação permanente, as misturas asfálticas contendo o menor teor de fíler apresentam os menores valores de deformação não recuperável, enquanto que as misturas contendo o valor intermediário de fíler apresentam os maiores valores. As propriedades reológicas dos mástiques mostraram que a adição de fíler torna o ligante asfáltico mais rígido e a cal hidratada é o fíler que provoca o maior aumento do valor do G*. A elasticidade do mástique aumenta com a adição dos fileres e é mais expressivo para os mástiques compostos pelo fíler de cal hidratada e cimento Portland. Quanto maior o teor de fíler utilizado, maior a temperatura correspondente a G*/sen \'delta\́'> ou =1́,0 kPa da especificação Superpave, o que pode se refletir em misturas asfálticas com maior resistência à deformação permanente. Nas propriedades a baixa temperatura, a utilização de maiores teores de fíler prejudicam a resposta ao trincamento a baixas temperaturas e diminuem a eficiência na dissipação das tensões formadas durante a contração do ligante asfáltico, quando a temperatura do pavimento cai abruptamente, aumentando a formação de trincas e fissuras. Analisando os resultados da energia de fratura, a adição de fíler no mástique diminui a resistência ao trincamento por fadiga nas temperaturas intermediárias, porém a presença de fíler na mistura durante o envelhecimento torna seus efeitos menos prejudiciais.
The objective of this research is to contribute to the better understanding of mineral filler effects on the mechanical behavior of hot mix asphalt (HMA), particularly related to…
Advisors/Committee Members: Fernandes Júnior, José Leomar.
Subjects/Keywords: Asphalt mastic; Energia de fratura; Fíler mineral; Fracture energy; Hot mix asphalt; Mástique asfáltico; Mineral filler; Mistura asfáltica
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APA ·
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MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Bardini, V. S. d. S. (2013). Influência do fíler mineral em propriedades de misturas asfálticas densas. (Doctoral Dissertation). University of São Paulo. Retrieved from http://www.teses.usp.br/teses/disponiveis/18/18143/tde-17052013-090958/ ;
Chicago Manual of Style (16th Edition):
Bardini, Vivian Silveira dos Santos. “Influência do fíler mineral em propriedades de misturas asfálticas densas.” 2013. Doctoral Dissertation, University of São Paulo. Accessed March 04, 2021.
http://www.teses.usp.br/teses/disponiveis/18/18143/tde-17052013-090958/ ;.
MLA Handbook (7th Edition):
Bardini, Vivian Silveira dos Santos. “Influência do fíler mineral em propriedades de misturas asfálticas densas.” 2013. Web. 04 Mar 2021.
Vancouver:
Bardini VSdS. Influência do fíler mineral em propriedades de misturas asfálticas densas. [Internet] [Doctoral dissertation]. University of São Paulo; 2013. [cited 2021 Mar 04].
Available from: http://www.teses.usp.br/teses/disponiveis/18/18143/tde-17052013-090958/ ;.
Council of Science Editors:
Bardini VSdS. Influência do fíler mineral em propriedades de misturas asfálticas densas. [Doctoral Dissertation]. University of São Paulo; 2013. Available from: http://www.teses.usp.br/teses/disponiveis/18/18143/tde-17052013-090958/ ;
Texas A&M University
23.
Alvarez Lugo, Allex Eduardo.
IMPROVING MIX DESIGN AND CONSTRUCTION OF PERMEABLE FRICTION COURSE MIXTURES.
Degree: PhD, Civil Engineering, 2012, Texas A&M University
URL: http://hdl.handle.net/1969.1/ETD-TAMU-2009-12-7321
► Permeable friction course (PFC), or new generation open-graded friction course (OGFC) mixtures, are hot mix asphalt (HMA) characterized by high total air voids (AV) content…
(more)
▼ Permeable friction course (PFC), or new generation open-graded friction course (OGFC)
mixtures, are
hot mix asphalt (HMA) characterized by high total air voids (AV) content
(minimum 18 %) as compared to the most commonly used dense-graded HMA. The high AV
content confers to PFC mixtures both high permeability and noise reduction effectiveness. These
characteristics and the high values of surface friction exhibited by PFC mixtures, as compared to
dense-graded HMA, lead to improvements in safety and the environment, which make PFC one
of the safest, cleanest, and quietest alternatives currently available for surface paving. The main
objective of this study was improving the current PFC
mix design method and construction
practices in terms of compaction control.
Corresponding results were integrated in an improved
mix design method that is based
on the guidelines of the current
mix design method used by the Texas Department of
Transportation. The improved
mix design included modified computation of the inputs required
to determine mixture density (or corresponding total AV content). These changes led to a
proposed modification of the density specification for
mix design from 78-82 % to 76-80 %. In
addition, the water-accessible AV content was proposed as a surrogate of the total AV content
for
mix design and evaluation. The improved
mix design method also includes verification of
drainability, durability, and stone-on-stone contact. Computation of the expected value of
permeability (E[k]) and measurement of the water flow value were recommended, respectively,
for verification of drainability in the laboratory (using specimens compacted in the Superpave
Gyratory Compactor (SGC)) and in the field. The Cantabro loss test conducted in both dry- and
wet-conditions was suggested for assessing mixture durability. Improved criteria were proposed for verification of stone-on-stone contact based on the evaluation of the AV content in the coarse
aggregate fraction of the mixture. In addition, comparison of the internal structure of field-and
laboratory-compacted mixtures supported recommendation of a field-compaction control.
Recommendations to reduce the horizontal heterogeneity of AV encountered in PFC specimens
included using road cores with a minimum 152.4 mm diameter and coring SGC specimens from
152.4 to 101.6 mm in diameter
Advisors/Committee Members: Epps Martin, Amy (advisor), Lytton, Robert L. (committee member), Masad, Eyad (committee member), Glover, Charles (committee member).
Subjects/Keywords: Permeable Friction Course; Open-Graded Friction Course; Mix Design; X-ray Computed Tomography; Permeability; Hot Mix Asphalt; Mixture Internal Structure
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APA (6th Edition):
Alvarez Lugo, A. E. (2012). IMPROVING MIX DESIGN AND CONSTRUCTION OF PERMEABLE FRICTION COURSE MIXTURES. (Doctoral Dissertation). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2009-12-7321
Chicago Manual of Style (16th Edition):
Alvarez Lugo, Allex Eduardo. “IMPROVING MIX DESIGN AND CONSTRUCTION OF PERMEABLE FRICTION COURSE MIXTURES.” 2012. Doctoral Dissertation, Texas A&M University. Accessed March 04, 2021.
http://hdl.handle.net/1969.1/ETD-TAMU-2009-12-7321.
MLA Handbook (7th Edition):
Alvarez Lugo, Allex Eduardo. “IMPROVING MIX DESIGN AND CONSTRUCTION OF PERMEABLE FRICTION COURSE MIXTURES.” 2012. Web. 04 Mar 2021.
Vancouver:
Alvarez Lugo AE. IMPROVING MIX DESIGN AND CONSTRUCTION OF PERMEABLE FRICTION COURSE MIXTURES. [Internet] [Doctoral dissertation]. Texas A&M University; 2012. [cited 2021 Mar 04].
Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2009-12-7321.
Council of Science Editors:
Alvarez Lugo AE. IMPROVING MIX DESIGN AND CONSTRUCTION OF PERMEABLE FRICTION COURSE MIXTURES. [Doctoral Dissertation]. Texas A&M University; 2012. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2009-12-7321
University of Waterloo
24.
Varamini, Sina.
Technical, Economic and Environmental Evaluation of Warm Mix Asphalt and Coloured Asphalt for Usage in Canada.
Degree: 2016, University of Waterloo
URL: http://hdl.handle.net/10012/11112
► Transportation services play an important role in the Canadian economy, and social activities as well as Canada's competitiveness in the global economy. As one of…
(more)
▼ Transportation services play an important role in the Canadian economy, and social activities as well as Canada's competitiveness in the global economy. As one of the most valuable systems of transportation in Canada, 90 percent of all goods and services are transported via trucks over an extensive land area characterized by diverse landscapes and harsh environments. These unique characteristics of Canada, coupled with other challenges including an aging road network and highway infrastructure, limited finances, and environmental considerations provide great incentive to decision makers at federal, provincial/territorial, and municipal government levels to consider new and innovative ways to fund road transportation infrastructure. In an effort to evaluate two innovative pavement technologies applicable in both urban and rural areas, this research project is focused on (1) Coloured Hot Mix Asphalt (CHMA) and (2) Warm Mix Asphalt (WMA).
The intent of the CHMA research study was to characterize the structural, functional, and environmental characteristics of the coloured asphalt design by analyzing laboratory and field performance. This research was focussed on providing innovative and sustainable solutions, which can be effectively used in Canada as means of ensuring durability and high performance throughout the material’s life cycle.
To achieve the research objectives, materials collected during paving operations and materials produced under controlled laboratory conditions were systematically evaluated at CPATT to capture the impact of colouring pigment on the mixture’s strength. Results provided in this thesis suggest that pigmentation can adversely affect the performance and proper steps have to been taken to mitigate such effect: including using softer binder and lower Dust Proportion (DP) in the mixture. The state-of-the-art AASHTOWare Mechanistic-Empirical (M-E) Software was employed to complete the most accurate level of analysis, referred to as “Level 1”. ME analysis outputs were then used to develop prediction models for a design life of 50 years that can be used to establish Life Cycle Cost Analysis (LCCA). Based on LCCA analysis Bus Rapid Transit (BRT) lane structure surfaced with CHMA was found to be significantly more expensive to construct and maintain than a similar structure surfaced with HMA located in York Region. However, this cost difference is expected to decrease in near future as contractors are becoming more familiar with the mixture’s design and production techniques.
This research further evaluated the performance of WMA technology by using different Performance-Graded Asphalt Cement (PGAC) sources modified with three types of WMA additives (Evotherm 3G, Rediset LQ, and SonneWarmix) in combination with two types of aggregate of pink granite and trap rock diabase. Results obtained in this comprehensive research were statistically analyzed to verify the significance of the results. All information collected from a combination of qualitative and quantitative laboratory test methods…
Subjects/Keywords: Warm Mix Ashalt; Coloured Hot Mix Asphalt; Pavement Sustainability; AASHTOWare MEPDG; Pavement Life Cycle Cost Analysis
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APA ·
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Export
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Manager
APA (6th Edition):
Varamini, S. (2016). Technical, Economic and Environmental Evaluation of Warm Mix Asphalt and Coloured Asphalt for Usage in Canada. (Thesis). University of Waterloo. Retrieved from http://hdl.handle.net/10012/11112
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Varamini, Sina. “Technical, Economic and Environmental Evaluation of Warm Mix Asphalt and Coloured Asphalt for Usage in Canada.” 2016. Thesis, University of Waterloo. Accessed March 04, 2021.
http://hdl.handle.net/10012/11112.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Varamini, Sina. “Technical, Economic and Environmental Evaluation of Warm Mix Asphalt and Coloured Asphalt for Usage in Canada.” 2016. Web. 04 Mar 2021.
Vancouver:
Varamini S. Technical, Economic and Environmental Evaluation of Warm Mix Asphalt and Coloured Asphalt for Usage in Canada. [Internet] [Thesis]. University of Waterloo; 2016. [cited 2021 Mar 04].
Available from: http://hdl.handle.net/10012/11112.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Varamini S. Technical, Economic and Environmental Evaluation of Warm Mix Asphalt and Coloured Asphalt for Usage in Canada. [Thesis]. University of Waterloo; 2016. Available from: http://hdl.handle.net/10012/11112
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
25.
Karr, Grant J.
Development of a New Test Specimen with Tapered Cross-Section for Use in Uniaxial Fatigue Testing of Hot Mix Asphalt.
Degree: 2019, University of Hawaii
URL: http://hdl.handle.net/10125/62260
Subjects/Keywords: Hot Mix Asphalt; Asphalt Concrete Fatigue; Asphalt Concrete Performance Testing
…height hot-mix asphalt (HMA) cylinders in a gyratory compactor.
These cylinders are… …consistent with that of a hot-mix asphalt at 40°C, the analysis showed strain magnitudes near the… …x28;Content)
Gmb
Bulk Specific Gravity
Gmm
Maximum Specific Gravity
HMA
Hot Mix… …overview
of the process is included below:
1. Produce 150-mm diameter asphalt mix specimen either… …mix design method, called Superpave (Asphalt Institute, 1996). In
terms of asphalt…
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APA ·
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MLA ·
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Export
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APA (6th Edition):
Karr, G. J. (2019). Development of a New Test Specimen with Tapered Cross-Section for Use in Uniaxial Fatigue Testing of Hot Mix Asphalt. (Thesis). University of Hawaii. Retrieved from http://hdl.handle.net/10125/62260
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Karr, Grant J. “Development of a New Test Specimen with Tapered Cross-Section for Use in Uniaxial Fatigue Testing of Hot Mix Asphalt.” 2019. Thesis, University of Hawaii. Accessed March 04, 2021.
http://hdl.handle.net/10125/62260.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Karr, Grant J. “Development of a New Test Specimen with Tapered Cross-Section for Use in Uniaxial Fatigue Testing of Hot Mix Asphalt.” 2019. Web. 04 Mar 2021.
Vancouver:
Karr GJ. Development of a New Test Specimen with Tapered Cross-Section for Use in Uniaxial Fatigue Testing of Hot Mix Asphalt. [Internet] [Thesis]. University of Hawaii; 2019. [cited 2021 Mar 04].
Available from: http://hdl.handle.net/10125/62260.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Karr GJ. Development of a New Test Specimen with Tapered Cross-Section for Use in Uniaxial Fatigue Testing of Hot Mix Asphalt. [Thesis]. University of Hawaii; 2019. Available from: http://hdl.handle.net/10125/62260
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
26.
Bardini, Vivian Silveira dos Santos.
Estudo de viabilidade técnica da utilização de cinzas da queima da casca de Pinus em obras de pavimentação asfáltica.
Degree: Mestrado, Infra-Estrutura de Transportes, 2008, University of São Paulo
URL: http://www.teses.usp.br/teses/disponiveis/18/18143/tde-03022009-095000/
;
► O processo industrial para fabricação de MDF - Medium Density Fiberboard - utiliza como combustível a casca de madeira Pinus, cuja queima gera um resíduo…
(more)
▼ O processo industrial para fabricação de MDF - Medium Density Fiberboard - utiliza como combustível a casca de madeira Pinus, cuja queima gera um resíduo cinzas de granulometria fina, que constitui um problema ambiental por conter algumas substâncias em quantidade acima da permitida pela NBR 10004:2004, que o classifica como resíduo de classe II A - não inerte. O objetivo geral desta pesquisa é testar a hipótese de que o resíduo cinzas podem ser utilizadas como fíler em misturas asfálticas, mediante a verificação das propriedades de interesse à engenharia através de ensaios de laboratório: resistência à tração por compressão diametral, módulo de resiliência, vida de fadiga, dano por umidade induzida, estabilidade e fluência Marshall. Foram realizados ensaios para determinação da massa específica das cinzas - resíduo, inclusive com picnometria de gás hélio. Primeiramente, o fíler mineral foi substituído em massa pelo resíduo, optando-se, em função dos resultados preliminares, pela equivalência em volume. As dosagens Marshall, para as misturas contendo resíduo, resultaram em um teor ótimo de ligante praticamente constante, independentemente do teor utilizado (3,5% e 6,0%). Quanto às propriedades mecânicas, nos ensaios de resistência à tração, os maiores valores foram verificados para as misturas contendo 3,5% de fíler mineral, enquanto as misturas contendo cinzas - resíduo - apresentaram os menores valores. Os maiores valores de módulo de resiliência foram das misturas contendo maiores teores de fíler, sendo que o fíler mineral resultou em maior módulo de resiliência do que o resíduo. Na avaliação do dano por umidade induzida, apenas as misturas contendo 6,0% de fíler mineral se mostraram não susceptíveis, enquanto que as misturas contendo resíduo foram as que apresentaram maior susceptibilidade. O resíduo também diminuiu a vida de fadiga, sendo a diferença para as misturas com fíler mineral mais acentuada para o menor teor de fíler. Apesar dos resultados indicarem uma piora de características com a utilização do resíduo, os valores obtidos ainda se situam, na maioria dos casos, acima dos limites mínimos estabelecidos pelas normas técnicas, encorajando pesquisas adicionais, principalmente em função do problema ambiental representado pelas cinzas da queima da casca de Pinus.
The industrial production of MDF - Medium Density Fiberboard - uses Pinus wood skin as a fuel, which, after the burning process, generates a fine gradation residue, an ash that is an environmental problem due to the content of some substances, above the quantity allowed by the NRB 10004:2004, and it is classified as a class II-A - non-inert product. The general purpose of this work is to test the hypothesis that the residue can be use as a filler in hot-mix asphalt, through the evaluation of technological properties by laboratory tests such as indirect tension, resilient modulus, fatigue life, moisture susceptibility, Marshall stability and creep. The evaluation of specific gravity of the residue was done by the gas pycnometer method. Initially,…
Advisors/Committee Members: Fernandes Junior, Jose Leomar.
Subjects/Keywords: Cinzas residuais de MDF; Fíler mineral; Hot-mix asphalt; MDF bottom ashes; Mineral filler; Mistura asfáltica; Reuse; Reutilização; Superpave; Superpave
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APA ·
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MLA ·
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Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Bardini, V. S. d. S. (2008). Estudo de viabilidade técnica da utilização de cinzas da queima da casca de Pinus em obras de pavimentação asfáltica. (Masters Thesis). University of São Paulo. Retrieved from http://www.teses.usp.br/teses/disponiveis/18/18143/tde-03022009-095000/ ;
Chicago Manual of Style (16th Edition):
Bardini, Vivian Silveira dos Santos. “Estudo de viabilidade técnica da utilização de cinzas da queima da casca de Pinus em obras de pavimentação asfáltica.” 2008. Masters Thesis, University of São Paulo. Accessed March 04, 2021.
http://www.teses.usp.br/teses/disponiveis/18/18143/tde-03022009-095000/ ;.
MLA Handbook (7th Edition):
Bardini, Vivian Silveira dos Santos. “Estudo de viabilidade técnica da utilização de cinzas da queima da casca de Pinus em obras de pavimentação asfáltica.” 2008. Web. 04 Mar 2021.
Vancouver:
Bardini VSdS. Estudo de viabilidade técnica da utilização de cinzas da queima da casca de Pinus em obras de pavimentação asfáltica. [Internet] [Masters thesis]. University of São Paulo; 2008. [cited 2021 Mar 04].
Available from: http://www.teses.usp.br/teses/disponiveis/18/18143/tde-03022009-095000/ ;.
Council of Science Editors:
Bardini VSdS. Estudo de viabilidade técnica da utilização de cinzas da queima da casca de Pinus em obras de pavimentação asfáltica. [Masters Thesis]. University of São Paulo; 2008. Available from: http://www.teses.usp.br/teses/disponiveis/18/18143/tde-03022009-095000/ ;
27.
Moura, Edson de.
Estudo de deformação permanente em trilha de roda de misturas asfálticas em pista e em laboratório.
Degree: PhD, Engenharia de Transportes, 2010, University of São Paulo
URL: http://www.teses.usp.br/teses/disponiveis/3/3138/tde-17082010-094223/
;
► Dentre os diversos tipos de defeitos estruturais a que um pavimento está sujeito, a deformação permanente em trilha de roda da camada de rolamento é…
(more)
▼ Dentre os diversos tipos de defeitos estruturais a que um pavimento está sujeito, a deformação permanente em trilha de roda da camada de rolamento é um dos mais importantes, pois além de propiciar uma degradação acelerada da estrutura do pavimento, ele reduz consideravelmente a segurança do usuário. Este trabalho pesquisa os processos que levam à deformação permanente de revestimentos asfálticos, utilizando como estudo de caso uma pista-teste localizada na Rodovia BR 376 PR, construída com a finalidade principal de estudar os afundamentos em trilha de roda. Foram executados 10 trechos, com 200 m de extensão cada um, em aclive, na 3ª faixa de rolamento, sujeita a tráfego pesado de caminhões lentos. Os trechos experimentais consistem de restauração de pista existente, onde foram executados diferentes tipos de revestimentos asfálticos, variando-se o tipo de graduação e também o tipo de ligante asfáltico, todas dosadas pelo método Marshall. Três dos dez trechos foram submetidos ao ensaio acelerado por um simulador de tráfego móvel de pista, em escala real. As misturas asfálticas foram igualmente ensaiadas em laboratório para verificação da dosagem por equipamento giratório francês e por simulador de tráfego tipo LPC. Além disso, foram extraídas placas do revestimento asfáltico da pista-teste as quais foram submetidas ao simulador de tráfego de laboratório. O objetivo central desta pesquisa foi de estudar a consistência dos resultados obtidos em campo e em laboratório, e a previsibilidade de deformações em campo através do método laboratorial. A pesquisa verificou e analisou a redução do volume de vazios das misturas asfálticas em pista e em laboratório associadas à deformação permanente, procurando relacionar a redução do volume de vazios com a deformação. A pesquisa mostrou que os ensaios de laboratório com o simulador de tráfego LPC podem ser empregados para prever as ocorrências de afundamentos em pista. Os resultados indicam a adoção do limite máximo de 5% de deformação permanente no equipamento de laboratório para os tipos de misturas asfálticas testadas para reduzir as possíveis ocorrências de deformações permanentes de revestimentos asfálticos sujeitos a tráfego muito pesado. Nas condições dos ensaios laboratoriais da pesquisa, que se aplicam à pista-teste, as misturas asfálticas mais recomendadas quanto à resistência à deformação permanente são as misturas com asfalto modificado por polímero SBS e RET, e as misturas com asfalto-borracha. Dependendo das características do ligante, o CAP 30/45 também pode ser empregado; no entanto, o CAP 50/70 mostrou-se inadequado para tráfego pesado e lento. A graduação é uma característica relevante para a estabilidade das misturas asfálticas, devendo os agregados estarem bem entrosados no caso das graduações contínuas e bem-graduadas; no entanto a macrotextura resultante deve ser estudada para evitar superfícies fechadas que reduzam a segurança dos usuários em pistas molhadas. Foram estudadas duas misturas descontínuas gap-graded que se mostraram adequadas para tráfego pesado…
Advisors/Committee Members: Bernucci, Liedi Légi Bariani.
Subjects/Keywords: Asfalto; Binder; Deformação permanente em trilha de roda; Experimental test; Hot mix asphalt; Ligantes; Pavement; Pavimentação; Pista teste; Wheel track rutting
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APA (6th Edition):
Moura, E. d. (2010). Estudo de deformação permanente em trilha de roda de misturas asfálticas em pista e em laboratório. (Doctoral Dissertation). University of São Paulo. Retrieved from http://www.teses.usp.br/teses/disponiveis/3/3138/tde-17082010-094223/ ;
Chicago Manual of Style (16th Edition):
Moura, Edson de. “Estudo de deformação permanente em trilha de roda de misturas asfálticas em pista e em laboratório.” 2010. Doctoral Dissertation, University of São Paulo. Accessed March 04, 2021.
http://www.teses.usp.br/teses/disponiveis/3/3138/tde-17082010-094223/ ;.
MLA Handbook (7th Edition):
Moura, Edson de. “Estudo de deformação permanente em trilha de roda de misturas asfálticas em pista e em laboratório.” 2010. Web. 04 Mar 2021.
Vancouver:
Moura Ed. Estudo de deformação permanente em trilha de roda de misturas asfálticas em pista e em laboratório. [Internet] [Doctoral dissertation]. University of São Paulo; 2010. [cited 2021 Mar 04].
Available from: http://www.teses.usp.br/teses/disponiveis/3/3138/tde-17082010-094223/ ;.
Council of Science Editors:
Moura Ed. Estudo de deformação permanente em trilha de roda de misturas asfálticas em pista e em laboratório. [Doctoral Dissertation]. University of São Paulo; 2010. Available from: http://www.teses.usp.br/teses/disponiveis/3/3138/tde-17082010-094223/ ;
Texas A&M University
28.
Jamison, Brandon Parker.
Laboratory Evaluation of Hot-Mix Asphalt Concrete Fatigue Cracking Resistance.
Degree: MS, Civil Engineering, 2012, Texas A&M University
URL: http://hdl.handle.net/1969.1/ETD-TAMU-2010-12-8283
► The recent changes in the Texas Department of Transportation (TxDOT) hot mix asphalt (HMA) mix design procedures to ensure that the mixture types routinely used…
(more)
▼ The recent changes in the Texas Department of Transportation (TxDOT)
hot mix asphalt (HMA)
mix design procedures to ensure that the mixture types routinely used on Texas highways are not prone to rutting raised concerns that these mixture types are now more susceptible to fatigue cracking. The primary goal of this study was to evaluate fatigue cracking test methods and recommend that which is both simple and robust, especially in qualifying commonly used Texas mixture types. One way to minimize fatigue cracking is through material screening and selection of appropriate
mix designs that are representative of fatigue-resistant HMA mixes. However, there are not many standardized laboratory fracture resistance tests that have been universally adopted for routine
mix design and/or screening purposes for HMA fatigue resistance. In this study, four different fracture test methods: the Overlay Tester (OT), Direct Tension (DT), Indirect Tension (IDT), and Semicircular Bending (SCB) tests were comparatively evaluated for their potential application as surrogate tests for routine fracture resistance evaluation and screening of HMA mixes in the laboratory. The evaluation criteria included: rationality of the test concept and correlation to field performance, repeatability and variability, simplicity and practicality of the sample fabrication process, and simplicity of data analysis. Results and key findings based on the laboratory fatigue resistance characterization of various commonly used Texas coarse- and fine-graded HMA mixes (Type B, C, and D) are presented in this paper. Overall, preliminary findings indicated that no monotonically-loaded test would be appropriate as a surrogate fatigue resistance test; however, the SCB test showed potential as a repeated-loading test. Suggested SCB test improvements include developing the repeated SCB test protocol, determining the appropriate failure criterion, and correlating laboratory performance to field performance.
Advisors/Committee Members: Martin, Amy E. (advisor), Lytton, Robert L. (committee member), Hartwig, Karl T. (committee member).
Subjects/Keywords: hot-mix asphalt(HMA); fatigue cracking; fracture; Overlay Tester (OT); Direct Tension (DT); Indirect Tension (IDT); Semicircular Bending (SCB)
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APA ·
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MLA ·
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CSE |
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APA (6th Edition):
Jamison, B. P. (2012). Laboratory Evaluation of Hot-Mix Asphalt Concrete Fatigue Cracking Resistance. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2010-12-8283
Chicago Manual of Style (16th Edition):
Jamison, Brandon Parker. “Laboratory Evaluation of Hot-Mix Asphalt Concrete Fatigue Cracking Resistance.” 2012. Masters Thesis, Texas A&M University. Accessed March 04, 2021.
http://hdl.handle.net/1969.1/ETD-TAMU-2010-12-8283.
MLA Handbook (7th Edition):
Jamison, Brandon Parker. “Laboratory Evaluation of Hot-Mix Asphalt Concrete Fatigue Cracking Resistance.” 2012. Web. 04 Mar 2021.
Vancouver:
Jamison BP. Laboratory Evaluation of Hot-Mix Asphalt Concrete Fatigue Cracking Resistance. [Internet] [Masters thesis]. Texas A&M University; 2012. [cited 2021 Mar 04].
Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2010-12-8283.
Council of Science Editors:
Jamison BP. Laboratory Evaluation of Hot-Mix Asphalt Concrete Fatigue Cracking Resistance. [Masters Thesis]. Texas A&M University; 2012. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2010-12-8283
Texas A&M University
29.
Castelblanco Torres, Adhara.
Probabilistic analysis of air void structure and its relationship to permeability and moisture damage of hot mix asphalt.
Degree: MS, Civil Engineering, 2006, Texas A&M University
URL: http://hdl.handle.net/1969.1/3114
► The permeability of hot mix asphalt (HMA) is of special interest to engineers and researchers due to the effects that water has on asphalt pavement…
(more)
▼ The permeability of
hot mix asphalt (HMA) is of special interest to engineers and researchers due to the effects that water has on
asphalt pavement performance. Significant research has been done to study HMA permeability. However, most of the studies primarily focused on relating permeability to the average percent air voids in the
mix. Such relationships cannot predict permeability accurately due to the different distributions of air void structures at a given average percent of air voids. Air void distribution is a function of many factors such as
mix design, compaction method, and aggregate properties. Recent advances in X-ray computed tomography and image analysis techniques offer a unique opportunity to better quantify the air void structure and, consequently, predict HMA permeability.
This study is focused on portraying permeability as a function of air void size distribution by using a probabilistic approach that was previously developed by Garcia Bengochea for soils. This approach expresses permeability as a function of the probability density function (pdf) of the air void size distribution. Equations are derived in this thesis to describe this relationship for laboratory specimens compacted using the linear kneading compactor (LKC) and Superave^TM gyratory compactor (SGC) as well as for field cores (labeled as MS). A good correlation exists between permeability and the pdf of the air voids that formed the flow paths (i.e. connected voids).
The relationship between moisture damage, air void structure, and cohesive and adhesive bond energy is also investigated in this study. Moisture damage is evaluated by monitoring changes in mechanical properties due to moisture conditioning. The influence of air void structure on pore pressure is studied using a recently developed program at Texas A&M University that simulates fluid flow and pore pressure in a porous medium. The surface free energy of the aggregates and
asphalt are calculated from laboratory measurements using the Universal Sorption Device (USD) and the Wilhelmy Plate method, respectively, in order to test the compatibility of the aggregates with the
asphalt in the presence of water.
Advisors/Committee Members: Glover, Charles (advisor), Masad, Eyad (committee member), Smith, Roger (committee member).
Subjects/Keywords: hot mix asphalt; x-ray computed tomography; permeability
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APA ·
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MLA ·
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CSE |
Export
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APA (6th Edition):
Castelblanco Torres, A. (2006). Probabilistic analysis of air void structure and its relationship to permeability and moisture damage of hot mix asphalt. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/3114
Chicago Manual of Style (16th Edition):
Castelblanco Torres, Adhara. “Probabilistic analysis of air void structure and its relationship to permeability and moisture damage of hot mix asphalt.” 2006. Masters Thesis, Texas A&M University. Accessed March 04, 2021.
http://hdl.handle.net/1969.1/3114.
MLA Handbook (7th Edition):
Castelblanco Torres, Adhara. “Probabilistic analysis of air void structure and its relationship to permeability and moisture damage of hot mix asphalt.” 2006. Web. 04 Mar 2021.
Vancouver:
Castelblanco Torres A. Probabilistic analysis of air void structure and its relationship to permeability and moisture damage of hot mix asphalt. [Internet] [Masters thesis]. Texas A&M University; 2006. [cited 2021 Mar 04].
Available from: http://hdl.handle.net/1969.1/3114.
Council of Science Editors:
Castelblanco Torres A. Probabilistic analysis of air void structure and its relationship to permeability and moisture damage of hot mix asphalt. [Masters Thesis]. Texas A&M University; 2006. Available from: http://hdl.handle.net/1969.1/3114
North Carolina State University
30.
Yun, Taeyoung.
Development of a Viscoplastic Constitutive Model using Rate-Dependent Yield Criterion for HMA in Compression.
Degree: PhD, Civil Engineering, 2008, North Carolina State University
URL: http://www.lib.ncsu.edu/resolver/1840.16/3103
► This dissertation presents a uniaxial viscoplastic constitutive model that is capable of capturing the rate-dependent hardening-softening behavior of hot-mix asphalt (HMA) subject to compressive loading.…
(more)
▼ This dissertation presents a uniaxial viscoplastic constitutive model that is capable of capturing the rate-dependent hardening-softening behavior of
hot-
mix asphalt (HMA)
subject to compressive loading. Experimental support for such behavior is also given. In the constitutive model, Perzyna’s over-stress theory and a rate dependent hardening-softening function are used as the flow rule and yield stress function, respectively.
A comprehensive material experimental program is performed to identify the characteristic behaviors of HMA, including dynamic modulus test, monotonic test, repetitive creep and recovery test, and flow number test under various loading conditions. From the dynamic modulus test, it is confirmed that the dynamic modulus of HMA in compression is the same as that in tension-compression; however, it is shown that the dynamic modulus is especially dependent on confining pressure at conditions where the material is softest (high temperatures and low frequencies). Further, it is found that when affected by confining pressure, that the modulus increases as the confining pressure increases. It is also confirmed that the time-temperature superposition principle holds true regardless of loading type, severity of damage or viscoplastic strain, as evidenced by a series of constant strain rate tests and repetitive creep and recovery tests. A finding previously undocumented for HMA that is found in this experimental research, is that the resistance to viscoplastic flow, the yield stress, shows rate-dependent hardening and softening behavior. The rate-dependent hardening and softening of the yield stress explains the significant increase of viscoplastic strain in the repetitive creep and recovery tests with long rest periods or with short loading pulses relative to those with short rest periods or long loading pulses. The flow number test and tests combining repetitive creep and recovery and flow number tests are conducted to verify the model. The results indicate that the developed model is capable of accounting for the effects of rest period and loading sequence on viscoplastic strain development. These characteristics cannot be adequately captured with existing HMA viscoplastic models.
Advisors/Committee Members: Dr. Y. Richard Kim, Committee Chair (advisor), Dr. Roy H. Borden, Committee Member (advisor), Dr. Murthy N. Guddati, Committee Member (advisor), Dr. S. Ranji Ranjithan, Committee Member (advisor).
Subjects/Keywords: hot mix asphalt; viscoplastic model; rate-dependent yield criterion
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❌
APA ·
Chicago ·
MLA ·
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CSE |
Export
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Manager
APA (6th Edition):
Yun, T. (2008). Development of a Viscoplastic Constitutive Model using Rate-Dependent Yield Criterion for HMA in Compression. (Doctoral Dissertation). North Carolina State University. Retrieved from http://www.lib.ncsu.edu/resolver/1840.16/3103
Chicago Manual of Style (16th Edition):
Yun, Taeyoung. “Development of a Viscoplastic Constitutive Model using Rate-Dependent Yield Criterion for HMA in Compression.” 2008. Doctoral Dissertation, North Carolina State University. Accessed March 04, 2021.
http://www.lib.ncsu.edu/resolver/1840.16/3103.
MLA Handbook (7th Edition):
Yun, Taeyoung. “Development of a Viscoplastic Constitutive Model using Rate-Dependent Yield Criterion for HMA in Compression.” 2008. Web. 04 Mar 2021.
Vancouver:
Yun T. Development of a Viscoplastic Constitutive Model using Rate-Dependent Yield Criterion for HMA in Compression. [Internet] [Doctoral dissertation]. North Carolina State University; 2008. [cited 2021 Mar 04].
Available from: http://www.lib.ncsu.edu/resolver/1840.16/3103.
Council of Science Editors:
Yun T. Development of a Viscoplastic Constitutive Model using Rate-Dependent Yield Criterion for HMA in Compression. [Doctoral Dissertation]. North Carolina State University; 2008. Available from: http://www.lib.ncsu.edu/resolver/1840.16/3103
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Open Access Theses and Dissertations
