Transportation Research Congress 2017
Effect of Design Parameters on the Shear Property of Asphalt Mixture
Publication: Transportation Research Congress 2017: Sustainable, Smart, and Resilient Transportation
ABSTRACT
The objective of the paper was to investigate the effect of design parameters (namely, asphalt mixture gradation, asphalt performance grade, asphalt content, compaction effort) on the shear property of asphalt mixture. First, using SUPERPAVE design method, a Sup13 was designed as the reference gradation (Ndesign=75, 70# asphalt was used); then the effects of design parameters on the shear property of the reference gradation was studied by the following steps: (a) adjust the reference gradation to make it coarser/finer; (b) improve the asphalt grade by using SBS modified asphalt instead of 70# asphalt; (c) change asphalt content, OAC (optimum asphalt content) -0.5%, OAC +0.5%, OAC +1.0% were then used; (d) improve compaction effort to redesign the reference gradation (Ndesign=100, 125, 160 were then used). Keep other parameters constant when studying the effect of a single one. The shear strength of asphalt mixtures under different conditions were determined with UPT (uniaxial penetration test), to investigate the effect degree of varied design parameters. The test results showed that the effect degree of the design parameters on the shear strength of the asphalt mixture ranked as compaction effort, asphalt performance grade, gradation, and asphalt content. Therefore, in the asphalt mixture design and construction process, it was more efficient to improve the shear property by improving its compaction effort.
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ACKNOWLEDGMENTS
This study was sponsored by the key technical project of Sinopec Group (No. 116032) and the China Road and Bridge Corporation (No. 2013C005). The authors are grateful to the financial support.
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Published In
Transportation Research Congress 2017: Sustainable, Smart, and Resilient Transportation
Pages: 147 - 154
Editors: Linbing Wang, Ph.D., Virginia Polytechnic University, Hongren Gong, Ph.D., University of Tennessee, Knoxville, and Baoshan Huang, Ph.D., University of Tennessee, Knoxville
ISBN (Online): 978-0-7844-8251-3
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© 2019 American Society of Civil Engineers.
History
Published online: Oct 3, 2019
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