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http://dx.doi.org/10.7855/IJHE.2011.13.4.061

Development and Calibration of a Permanent Deformation Model for Asphalt Concrete Based on Shear Properties  

Lee, Hyun-Jong (세종대학교 건설환경공학과)
Baek, Jong-Eun (세종대학교 건설환경공학과)
Li, Qiang (중국 난징 임업대학교 토목공학과)
Publication Information
International Journal of Highway Engineering / v.13, no.4, 2011 , pp. 61-70 More about this Journal
Abstract
This study developed a permanent deformation model for asphalt concrete based on shear properties. Repeated load triaxial compression (RLTC), triaxial compressive strength, and indirect tension strength tests were performed for the three types of asphalt mixtures at various loading and temperature conditions to correlate shear properties of asphalt mixtures to rutting performance. For the given mixtures, as testing temperature increased, cohesion decreased, but friction angle was insensitive to temperature at $40^{\circ}C$ or higher. It was observed that deviatoric stress, confining pressure, temperature, and load frequency affected the permanent deformation of asphalt mixtures significantly. The permanent deformation model based on shear stress to strength ratio and loading time was developed using the laboratory test results and calibrated using accelerated pavement test data. The proposed model was able to predict the permanent deformation of the asphalt mixtures in a wide range of loading and temperature conditions with constant model coefficients.
Keywords
asphalt concrete; permanent deformation model; shear stress; shear strength; accelerated pavement test;
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