Abstract
Asphalt mastic is regarded as a bonding agent within the asphalt mixture and has a significant impact on asphalt mixture performance. Multiple stress creep recovery (MSCR) test are performed in this study to evaluate the effect of filler on high-temperature performance of asphalt mastic. In addition, the creep-recovery response of asphalt mastic with a wide range of creep stress levels was modeled using the Burgers model. It was found from the non-recovery compliance and percentage recovery results obtained from the MSCR test that the addition of filler can significantly improve the elastic and recoverable response of the asphalt mastic, and hence enhances the rutting potential of asphalt mastic. The Burgers model parameters including Em, ηm, Ek and ηk were obtained for asphalt mastic with different filler contents and creep stresses. Through correlating these parameters and MSCR test indicators, it was found that the parameter ηm has the highest correlation to the MSCR test results.
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