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A platform for research: civil engineering, architecture and urbanism
Characterization of viscoplastic yielding of asphalt concrete
Highlights A temperature and rate dependent viscoplastic yield surface is developed for asphalt concrete. A strain decomposition method is proposed to obtain viscoplastic strain and initial yield strength. Cohesion and strain hardening amplitude of asphalt concrete decrease when temperature increases or strain rate decreases. Temperature and strain rate coefficients can be accurately determined solely by the ultimate yield strength.
Abstract A temperature and strain rate dependent yield surface model was proposed to characterize the viscoplastic yielding of asphalt concrete. Laboratory tests were conducted on specimens that have two binders, two air void contents, and three aging periods. Strain decomposition was performed to obtain viscoplastic strain and stress-pseudostrain curves were constructed to determine the model parameters accurately and efficiently. Results indicate that a stiffer asphalt concrete has greater cohesion and strain hardening amplitude, both of which decline as temperature increases or strain rate decreases. The temperature and strain rate factors of the yield surface can be accurately determined solely by the peak stress of the strength tests.
Characterization of viscoplastic yielding of asphalt concrete
Highlights A temperature and rate dependent viscoplastic yield surface is developed for asphalt concrete. A strain decomposition method is proposed to obtain viscoplastic strain and initial yield strength. Cohesion and strain hardening amplitude of asphalt concrete decrease when temperature increases or strain rate decreases. Temperature and strain rate coefficients can be accurately determined solely by the ultimate yield strength.
Abstract A temperature and strain rate dependent yield surface model was proposed to characterize the viscoplastic yielding of asphalt concrete. Laboratory tests were conducted on specimens that have two binders, two air void contents, and three aging periods. Strain decomposition was performed to obtain viscoplastic strain and stress-pseudostrain curves were constructed to determine the model parameters accurately and efficiently. Results indicate that a stiffer asphalt concrete has greater cohesion and strain hardening amplitude, both of which decline as temperature increases or strain rate decreases. The temperature and strain rate factors of the yield surface can be accurately determined solely by the peak stress of the strength tests.
Characterization of viscoplastic yielding of asphalt concrete
Zhang, Yuqing (author) / Luo, Rong (author) / Lytton, Robert L. (author)
Construction and Building Materials ; 47 ; 671-679
2013-05-04
9 pages
Article (Journal)
Electronic Resource
English
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