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Apr 26, 2012
Permanent Deformation Characteristic of Asphalt Mixture Considering Pavement Temperature Distribution
Authors: Liping Cao [email protected], Zejiao Dong [email protected], and Lijun Sun [email protected]Author Affiliations
Publication: ICCTP 2009: Critical Issues In Transportation Systems Planning, Development, and Management
Abstract
Permanent deformation(PD) of asphalt mixture caused by high temperature (above 50°C), instead of the accumulative deformation caused by moderate temperature (20°C to 50°C), attracts more attention. First, distributions of pavement temperature based on continued hourly average pavement temperature data in Shanghai and Wilson County were introduced. The result indicated that percentage frequency of pavement temperature below 50°C is more than 90%, and that above 50°C is less than 5. Second, PD of two asphalt mixtures measured by APA (asphalt pavement analyzer), dynamic stability (DS) of four mixtures tested by wheel tracking device and shear strength of five mixtures tested by uniaxial penetration test were introduced. The results show that PD at 40°C is almost 50 percent of that at 60°C, and that the ranking of high temperature performance for the same mixture changes with temperatures. At last, result of rutting depths calculated by the Mechanistic-Empirical Pavement Design Guide (MEPDG) suggests that rutting depth for high temperature months is almost two to three times of that for moderate temperature months. Therefore, PD of asphalt mixtures should be evaluated considering pavement temperature distribution.
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© 2009 American Society of Civil Engineers.
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Published online: Apr 26, 2012
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Dr., Assistant Professor, School of Transportation Science and Engineering, Harbin Institute of Technology, Harbin, P.R.China. E-mail: [email protected]
Dr., Associate Professor, School of Transportation Science and Engineering, Harbin Institute of Technology, Harbin, P.R.China. E-mail: [email protected]
Professor, School of Transportation Engineering, Tongji University, No.4800, Caoan Road, Shanghai 201804, China;. E-mail: [email protected]
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