Study of High Temperature Performance of Asphalt Mastic Based on Dynamic Viscoelastic Mechanics

Abstract

Dynamic frequency sweep and stable flow experiments were conducted on four asphalt mastics consisting of fly ash, limestone, hydrated lime and cement fillers. The influence of different mineral fillers and the ratio of filler to asphalt on high temperature performance were evaluated. The result shows that the linear viscoelastic region of asphalt mastics binder is smaller than that of asphalt. Increase trend of complex modulus of these four mastics is consistent at low temperature and high frequency. But for the case of high temperature and low frequency, the difference of their complex modulus is great. With the same ratio of filler to asphalt, hydrated lime improves high temperature behavior most significantly, followed by fly ash cement and limestone. However the difference is not significant. The ratio of fine is not proportional to complex modulus or viscosity.