ABSTRACT
A newly developed evaluation index is proposed to describe anti-rutting performance of Gravel Asphalt Concrete (GAC) mixtures under high temperature and heavy loads. First, the Chinese Wheel Grinding (CWG) test and Accelerated Asphalt Pavement (AAP) test was conducted for different temperatures to determine the crucial temperature of anti-rutting performance of GAC mixtures. Then, the correlation between results from CWG test and AAP test was determined to confirm the validity of using AAP test for further experiments. The relationship between Dynamic Stability (DS) and viscosity of asphalt mixtures as well as traffic loads was also conducted to verify the correlation. Lastly, the fitting results of DS was confirmed based on temperature, traffic loads and viscosity of modified asphalt used in GAC mixtures. The fitting results confirmed that anti-rutting performance of GAC mixtures decreases remarkably when under high temperature and heavy loads.
