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University of Kentucky
1.
Curd, Jason M.
Unsaturated Soil Parameters From Field Stiffness Measurements.
Degree: 2013, University of Kentucky
URL: https://uknowledge.uky.edu/ce_etds/11 
► The behavior of unsaturated soils depends heavily on material properties and soil conditions. In Geotechnical Engineering, compacted soils are frequently used as fill material, and…
(more)
▼ The behavior of unsaturated soils depends heavily on material properties and soil conditions. In Geotechnical Engineering, compacted soils are frequently used as fill material, and quality control is vital to the construction process. There are few methods available to estimate the parameters associated with unsaturated soils based on field measurements, and a relationship between these factors could reduce testing time and lower construction costs. Undrained triaxial tests were performed on four clays representing a range of material properties in an effort to reach the maximum dry density, which provides the highest bearing capacity. Each clay was compacted at optimum moisture content, as well as wet and dry of optimum. Measurements were taken using the GeoGauge and shear wave velocities. An empirical approach was used to estimate the effect of a density gradient on soil suction. A relationship between the normal stress and matric suction produced a strong trend when plotted against a function of stiffness and the void ratio, which represents a density gradient. Another relationship between the GeoGauge and shear wave stiffness measurements was found, but no relationship with the material properties of the samples was observed, indicating that more in-depth research is needed to find a stronger relationship.
Subjects/Keywords: Unsaturated Soil Mechanics; Shear Modulus; Soil Stiffness; Shear Wave Velocity; Geogauge; Civil Engineering; Geotechnical Engineering
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APA (6th Edition):
Curd, J. M. (2013). Unsaturated Soil Parameters From Field Stiffness Measurements. (Masters Thesis). University of Kentucky. Retrieved from https://uknowledge.uky.edu/ce_etds/11
Chicago Manual of Style (16th Edition):
Curd, Jason M. “Unsaturated Soil Parameters From Field Stiffness Measurements.” 2013. Masters Thesis, University of Kentucky. Accessed March 03, 2021.
https://uknowledge.uky.edu/ce_etds/11.
MLA Handbook (7th Edition):
Curd, Jason M. “Unsaturated Soil Parameters From Field Stiffness Measurements.” 2013. Web. 03 Mar 2021.
Vancouver:
Curd JM. Unsaturated Soil Parameters From Field Stiffness Measurements. [Internet] [Masters thesis]. University of Kentucky; 2013. [cited 2021 Mar 03].
Available from: https://uknowledge.uky.edu/ce_etds/11.
Council of Science Editors:
Curd JM. Unsaturated Soil Parameters From Field Stiffness Measurements. [Masters Thesis]. University of Kentucky; 2013. Available from: https://uknowledge.uky.edu/ce_etds/11
Louisiana State University
2.
Nazzal, Munir Darwish.
Field evaluation of in-situ test technology for QC/QA during construction of pavement layers and embankments.
Degree: MSCE, Civil and Environmental Engineering, 2003, Louisiana State University
URL: etd-1009103-094222
;
https://digitalcommons.lsu.edu/gradschool_theses/1002
► With the coming changes from an empirical to mechanistic-empirical pavement design, it becomes essential to move towards changing the quality control/quality assurance (QC/QA) procedures of…
(more)
▼ With the coming changes from an empirical to mechanistic-empirical pavement design, it becomes essential to move towards changing the quality control/quality assurance (QC/QA) procedures of compacted materials from a unit weight-based criterion to a stiffness/strength based criterion. The non-destructive in-situ tests such as Geogauge, Dynamic Cone Penetrometer (DCP), and Light Falling Weight Deflectometer (LFWD) can be used as effective tools in the assessment of subsurface conditions and in evaluating the stiffness of pavement materials and embankment. This thesis evaluates the potential use of these three devices to reliably measure the stiffness characteristics of highway materials for possible application in the QC/QA procedures during and after the construction of pavement layers and embankments. To achieve this, field tests were conducted on highway sections selected from different projects in Louisiana State. In addition, six test sections and three trench sections were constructed and tested at the LTRC Accelerated Load Facility (ALF) site for testing. The field tests included conducting Geogauge, LFWD, DCP tests and standard tests such as the Plate Load Test (PLT) and Falling Weight Deflectometer (FWD) test. The California Bearing Ratio (CBR) laboratory tests were also conducted on samples collected during field tests. Statistical analysis was conducted to correlate the measurements obtained from the three investigated devices and those obtained from the standard tests. Good correlations were obtained between the measurements of the investigated devices and the standard tests. Laboratory tests were also conducted to evaluate the influence depth of the Geogauge and LFWD devices. The results of laboratory tests indicated that the average influence depth for the Geogauge and LFWD devices are about 200 mm and 280 mm, respectively.
Subjects/Keywords: pavemnet construction; geogauge; DCP; LFWD; stiffness modulus; FWD; CBR
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APA (6th Edition):
Nazzal, M. D. (2003). Field evaluation of in-situ test technology for QC/QA during construction of pavement layers and embankments. (Masters Thesis). Louisiana State University. Retrieved from etd-1009103-094222 ; https://digitalcommons.lsu.edu/gradschool_theses/1002
Chicago Manual of Style (16th Edition):
Nazzal, Munir Darwish. “Field evaluation of in-situ test technology for QC/QA during construction of pavement layers and embankments.” 2003. Masters Thesis, Louisiana State University. Accessed March 03, 2021.
etd-1009103-094222 ; https://digitalcommons.lsu.edu/gradschool_theses/1002.
MLA Handbook (7th Edition):
Nazzal, Munir Darwish. “Field evaluation of in-situ test technology for QC/QA during construction of pavement layers and embankments.” 2003. Web. 03 Mar 2021.
Vancouver:
Nazzal MD. Field evaluation of in-situ test technology for QC/QA during construction of pavement layers and embankments. [Internet] [Masters thesis]. Louisiana State University; 2003. [cited 2021 Mar 03].
Available from: etd-1009103-094222 ; https://digitalcommons.lsu.edu/gradschool_theses/1002.
Council of Science Editors:
Nazzal MD. Field evaluation of in-situ test technology for QC/QA during construction of pavement layers and embankments. [Masters Thesis]. Louisiana State University; 2003. Available from: etd-1009103-094222 ; https://digitalcommons.lsu.edu/gradschool_theses/1002
Louisiana State University
3.
Seyman, Ekrem.
Laboratory evaluation of in-situ tests as potential quality control/quality assurance tools.
Degree: MSCE, Civil and Environmental Engineering, 2003, Louisiana State University
URL: etd-0903103-182255
;
https://digitalcommons.lsu.edu/gradschool_theses/2601
► There are new in-situ test devices such as the Geogauge, Light Falling Weight Deflectometer (LFWD) and Dynamic Cone Penetrometer (DCP). Unlike the nuclear density gauge,…
(more)
▼ There are new in-situ test devices such as the Geogauge, Light Falling Weight Deflectometer (LFWD) and Dynamic Cone Penetrometer (DCP). Unlike the nuclear density gauge, the new methods provide measurements based on the engineering properties (strength/stiffness) of soil instead of physical properties like field density and moisture content. However the geogauge, LFWD and the DCP are not yet proven to be reliable and the correlations of these tests with standard tests are limited. An extensive laboratory investigation was carried out to evaluate the Geogauge, LFWD and DCP as potential tests to measure in-situ stiffness of highway materials and embankments. In this study, test layers were prepared in two boxes that measure 5 ft length x 3 ft width x 2 ft depth at Louisiana Transportation Research Center (LTRC) Geosynthetic Engineering Research Laboratory (GERL). The results from a series of laboratory tests on embankment soils and base course materials were used to correlate Geogauge, LFWD, Dynamic Cone Penetrometer (DCP) measurements with the Plate Load Test (PLT) and California Bearing Ratio (CBR). There is good correlation between the LFWD dynamic modulus and PLT elastic modulus. The LFWD is a better alternative for static PLT compared to the Geogauge. Although LFWD is a dynamic test, the similarity in depth of influence with the PLT and the quality of developed correlations suggests that the LFWD has better potential to replace the PLT. There is no significant correlation between the LFWD and the CBR test. The Geogauge and the DCP correlates better with the CBR and DCP is already proven to be an effective tool to estimate in-situ CBR. Based on the developed correlations and laboratory experience, it was found that the investigated devices have the potential to measure in-situ stiffness of highway materials and embankments.
Subjects/Keywords: DCP; nuclear density gauge; stiffness; CBR; plate load test; LFWD; geogauge
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APA (6th Edition):
Seyman, E. (2003). Laboratory evaluation of in-situ tests as potential quality control/quality assurance tools. (Masters Thesis). Louisiana State University. Retrieved from etd-0903103-182255 ; https://digitalcommons.lsu.edu/gradschool_theses/2601
Chicago Manual of Style (16th Edition):
Seyman, Ekrem. “Laboratory evaluation of in-situ tests as potential quality control/quality assurance tools.” 2003. Masters Thesis, Louisiana State University. Accessed March 03, 2021.
etd-0903103-182255 ; https://digitalcommons.lsu.edu/gradschool_theses/2601.
MLA Handbook (7th Edition):
Seyman, Ekrem. “Laboratory evaluation of in-situ tests as potential quality control/quality assurance tools.” 2003. Web. 03 Mar 2021.
Vancouver:
Seyman E. Laboratory evaluation of in-situ tests as potential quality control/quality assurance tools. [Internet] [Masters thesis]. Louisiana State University; 2003. [cited 2021 Mar 03].
Available from: etd-0903103-182255 ; https://digitalcommons.lsu.edu/gradschool_theses/2601.
Council of Science Editors:
Seyman E. Laboratory evaluation of in-situ tests as potential quality control/quality assurance tools. [Masters Thesis]. Louisiana State University; 2003. Available from: etd-0903103-182255 ; https://digitalcommons.lsu.edu/gradschool_theses/2601
4.
Mendes, João Tiago Sousa.
Utilização do defletómetro de impacto ligeiro, do GeoGauge e do densímetro elétrico para o controlo in situ da qualidade de materiais em obras de pavimentação rodoviária.
Degree: 2013, RCAAP
URL: https://www.rcaap.pt/detail.jsp?id=oai:comum.rcaap.pt:10400.26/14341
► A presente dissertação procura contribuir para avaliar a utilidade de três equipamentos ligeiros na caracterização in situ de materiais de pavimentação de infraestruturas de transporte.…
(more)
▼ A presente dissertação procura contribuir para avaliar a utilidade de três
equipamentos ligeiros na caracterização in situ de materiais de pavimentação de
infraestruturas de transporte. Aquele tipo de avaliação visa o controlo de qualidade dos
materiais durante o processo construtivo, embora possa contribuir também para estimar o
comportamento previsível dos materiais utilizados.
O estudo centrou-se principalmente na utilização do Defletómetro de Impacto
Ligeiro (DIL), do
GeoGauge (GG) e do Densímetro Elétrico (DE). No entanto, realizaramse
complementarmente ensaios com o Cone de Penetração Dinâmica (CPD), com o
Gamadensímetro (GD) e com o Indicador de Qualidade de Pavimentos (IQP). O GG e o
DIL foram concebidos com o objetivo de medirem o módulo de deformabilidade de
camadas constituídas por solo ou por materiais granulares. O DE destina-se a avaliar a
qualidade da compactação de camadas de solo.
Numa fase inicial do trabalho, fez-se uma recolha bibliográfica sobre as
características, os princípios de funcionamento e o modo operatório de cada um dos
equipamentos, de modo a apoiar o estudo de caso que se realizou mais tarde no âmbito do
trabalho. O estudo bibliográfico centrou-se ainda na procura dos parâmetros que é possível
medir com cada um dos equipamentos estudados, bem como na procura de relações entre
aqueles parâmetros.
Para a realização da campanha de ensaios previamente estabelecida, o estudo
incluiu a construção de um modelo físico de pavimento. O pavimento construído, com
dimensões em planta da ordem de 2 1,5 m2, é constituído por duas estruturas diferentes,
assentes sobre a mesma fundação, com uma espessura total de 29 cm: uma formada por
uma camada granular e uma camada betuminosa; a outra constituída por uma camada de
solo estabilizado com cimento e uma camada betuminosa. Os materiais constituintes do
modelo foram caracterizados em laboratório e/ou in situ com recurso a ensaios
convencionais. Nalguns casos recorreu-se às fichas de produto para recolher as
propriedades necessárias.
Na fundação estudou-se a utilização do DIL, do GG e do DE. Adicionalmente,
avaliou-se o solo, com o CPD e com o GD. Nas camadas granular e de solo estabilizado
estudou-se a utilização do DIL, do GG e do GD. Na camada betuminosa efetuaram-se
ensaios com o DIL e com o IQP.
Em cada um dos materiais colocados foi estudada a utilização dos equipamentos
individualmente, de modo a obter os parâmetros caracterizadores dos materiais: o CBR
(com o CPD), o módulo de deformabilidade (com o DIL, o GG e o CPD), a baridade seca e
o teor em água (com o GD e o DE), a baridade (com o IQP). Quando se revelou útil,
compararam-se resultados obtidos com os diferentes equipamentos para cada um dos
materiais.
Em termos gerais, pode afirmar-se que a utilização dos equipamentos testados pode
contribuir de forma útil para avaliar os materiais in situ. Contudo, foram detetadas fragilidades no processo de caracterização, particularmente no que diz respeito à análise de
sistemas multicamada com o DIL. O processo de calibração necessário à obtenção de…
Advisors/Committee Members: Capitão, Silvino Dias.
Subjects/Keywords: Cone de penetração dinâmica; Defletómetro de impacto ligeiro; Densímetro elétrico; Ensaios não destrutivos; Fundação de pavimento; GeoGauge; Gamadensímetro; Indicador de qualidade do pavimento; Material granular; Mistura betuminosa; Solo estabilizado com cimento.
Record Details
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APA ·
Chicago ·
MLA ·
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CSE |
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to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Mendes, J. T. S. (2013). Utilização do defletómetro de impacto ligeiro, do GeoGauge e do densímetro elétrico para o controlo in situ da qualidade de materiais em obras de pavimentação rodoviária. (Thesis). RCAAP. Retrieved from https://www.rcaap.pt/detail.jsp?id=oai:comum.rcaap.pt:10400.26/14341
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):
Mendes, João Tiago Sousa. “Utilização do defletómetro de impacto ligeiro, do GeoGauge e do densímetro elétrico para o controlo in situ da qualidade de materiais em obras de pavimentação rodoviária.” 2013. Thesis, RCAAP. Accessed March 03, 2021.
https://www.rcaap.pt/detail.jsp?id=oai:comum.rcaap.pt:10400.26/14341.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Mendes, João Tiago Sousa. “Utilização do defletómetro de impacto ligeiro, do GeoGauge e do densímetro elétrico para o controlo in situ da qualidade de materiais em obras de pavimentação rodoviária.” 2013. Web. 03 Mar 2021.
Vancouver:
Mendes JTS. Utilização do defletómetro de impacto ligeiro, do GeoGauge e do densímetro elétrico para o controlo in situ da qualidade de materiais em obras de pavimentação rodoviária. [Internet] [Thesis]. RCAAP; 2013. [cited 2021 Mar 03].
Available from: https://www.rcaap.pt/detail.jsp?id=oai:comum.rcaap.pt:10400.26/14341.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Mendes JTS. Utilização do defletómetro de impacto ligeiro, do GeoGauge e do densímetro elétrico para o controlo in situ da qualidade de materiais em obras de pavimentação rodoviária. [Thesis]. RCAAP; 2013. Available from: https://www.rcaap.pt/detail.jsp?id=oai:comum.rcaap.pt:10400.26/14341
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
. 
Open Access Theses and Dissertations