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You searched for subject:(Pavement Preservation). Showing records 1 – 2 of 2 total matches.

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Georgia Tech

1. Gardner, Lauren Jessica. Data-driven pavement maintenance and rehabilitation strategies for a new state route prioritization system.

Degree: MS, Civil and Environmental Engineering, 2018, Georgia Tech

GDOT, which is responsible for a large network of primarily asphalt pavements, has been utilizing a model developed by Georgia Tech under Research Project 05-19 for its current performance analyses. While the model provides an adequate analysis of pavement performance within the network and adheres to both the MAP-21 and the FAST Act, the current model has not been updated in nearly 10 years. Because the existing model is a probabilistic model, the prediction power of the model suffers without the use of current data. Additionally, the GDOT has implemented a new policy that identifies the priority of pavement projects based on importance and utilization. The introduction of the new policy provides an opportunity to better categorize the current pavement system to maximize utilization of the GDOT’s resources for maintenance. Advances in segment-level survey collection documentation also provides a potential area of improvement as the data enables Maintenance, Rehabilitation, and Reconstruction (MR&R) trigger criteria to be studied. By utilizing new techniques, policies, and data, the existing model used by GDOT for the PMS can be improved. Questions about improved data processing, model development using pavement priority categories, and trigger criteria information can be answered by updating the previous model and utilizing the COPACES system. The results should be able to more efficiently and cost-effectively manage GDOT’s pavement preservation planning at a network level.

Subjects/Keywords: Pavement management; Pavement preservation

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Gardner, L. J. (2018). Data-driven pavement maintenance and rehabilitation strategies for a new state route prioritization system. (Masters Thesis). Georgia Tech. Retrieved from http://hdl.handle.net/1853/60310

Chicago Manual of Style (16th Edition):

Gardner, Lauren Jessica. “Data-driven pavement maintenance and rehabilitation strategies for a new state route prioritization system.” 2018. Masters Thesis, Georgia Tech. Accessed December 18, 2018. http://hdl.handle.net/1853/60310.

MLA Handbook (7th Edition):

Gardner, Lauren Jessica. “Data-driven pavement maintenance and rehabilitation strategies for a new state route prioritization system.” 2018. Web. 18 Dec 2018.

Vancouver:

Gardner LJ. Data-driven pavement maintenance and rehabilitation strategies for a new state route prioritization system. [Internet] [Masters thesis]. Georgia Tech; 2018. [cited 2018 Dec 18]. Available from: http://hdl.handle.net/1853/60310.

Council of Science Editors:

Gardner LJ. Data-driven pavement maintenance and rehabilitation strategies for a new state route prioritization system. [Masters Thesis]. Georgia Tech; 2018. Available from: http://hdl.handle.net/1853/60310


University of Minnesota

2. Ghosh, Debaroti. Experimental Investigation of Bio-sealants Used for Pavement Preservation and Development of a New Strength Test for Asphalt Binders at Low Temperature.

Degree: PhD, Civil Engineering, 2017, University of Minnesota

Surface treatment using sealants as a mean of pavement preservation is an important tool for cost-effectively extending service life of pavement. Sealants have become an important tool for cost-effectively extending the service life pavements. Due to the combined negative effects of asphalt aging and thermal cracking, it is always more challenging to choose an appropriate preservation technique for pavements built in cold-regions. Asphalt aging and thermal cracking negatively affect pavements built in cold climates. Therefore, it is important to evaluate the effects of sealants in laboratory conditions before application in the field to ensure effective performance. However, preservation activities cannot effectively address major distresses, such as low-temperature cracking, that can occur when the pavement was built from the very beginning with less durable materials. Therefore, an essential requirement to mitigate low-temperature cracking of pavements for asphalt materials used in the construction of pavement built in cold- regions is ensuring proper fracture properties of the asphalt materials used in construction. This study has two parts. In the first part, a laboratory evaluation of the effects of adding bio-sealants to both asphalt binder and mixture is performed. The goal is to obtain relevant properties of treated asphalt materials to understand the mechanism by which sealants improve pavement performance. For asphalt binders, a dynamic shear rheometer and a bending beam rheometer were used to obtain rheological properties of treated and untreated asphalt binders. For asphalt mixtures, field cores from both untreated and treated sections were collected and thin beam specimens were prepared from the cores to compare the creep and strength properties of the field-treated and laboratory-treated mixture. It is observed that the oil-based sealants have a significant softening effect on the control binder compared to the water-based sealant and traditional emulsion. Oil-based sealants increased rutting and fatigue potential of the binder and helped the low-temperature cracking resistance. For asphalt mixtures, different trends are observed for the field samples compared to the laboratory prepared samples. Similar to binder results, significant differences are observed between the asphalt mixtures treated with oil-based and water-based sealants, respectively. Additional analyses were performed to better understand the sealant effects. Fourier transform infrared spectroscopy (FTIR) analysis showed that the sealant products could not be detected in mixture samples collected from the surface of the treated section. Semi-empirical Hirsch model was able to predict asphalt mixture creep stiffness from binder stiffness. The results of a distress survey of the test sections correlated well with the laboratory findings. In the second part, a news binder strength testing method is proposed with the goal to provide an effective tool for selecting asphalt binders that are crack resistant. A modified Bending Beam Rheometer…

Subjects/Keywords: Bending Beam Rheometer; Binder Strength; Bio-Sealant; Dynamic Rheometer; Pavement Preservation; Rheology

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Ghosh, D. (2017). Experimental Investigation of Bio-sealants Used for Pavement Preservation and Development of a New Strength Test for Asphalt Binders at Low Temperature. (Doctoral Dissertation). University of Minnesota. Retrieved from http://hdl.handle.net/11299/192677

Chicago Manual of Style (16th Edition):

Ghosh, Debaroti. “Experimental Investigation of Bio-sealants Used for Pavement Preservation and Development of a New Strength Test for Asphalt Binders at Low Temperature.” 2017. Doctoral Dissertation, University of Minnesota. Accessed December 18, 2018. http://hdl.handle.net/11299/192677.

MLA Handbook (7th Edition):

Ghosh, Debaroti. “Experimental Investigation of Bio-sealants Used for Pavement Preservation and Development of a New Strength Test for Asphalt Binders at Low Temperature.” 2017. Web. 18 Dec 2018.

Vancouver:

Ghosh D. Experimental Investigation of Bio-sealants Used for Pavement Preservation and Development of a New Strength Test for Asphalt Binders at Low Temperature. [Internet] [Doctoral dissertation]. University of Minnesota; 2017. [cited 2018 Dec 18]. Available from: http://hdl.handle.net/11299/192677.

Council of Science Editors:

Ghosh D. Experimental Investigation of Bio-sealants Used for Pavement Preservation and Development of a New Strength Test for Asphalt Binders at Low Temperature. [Doctoral Dissertation]. University of Minnesota; 2017. Available from: http://hdl.handle.net/11299/192677

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