Study on the Influence of Sasobit Warm Mixing Agent on the Performance of SBS Modified Asphalt and Mixture
Based on the test of three indexes of asphalt,the optimum content of Sasobit warm mix a-gent was determined to be 3％.Through DSR rheological test,it was found that the complex modulus and rutting factor of asphalt with Sasobit warm mix agent increased,the phase angle of asphalt de-creased and the high temperature performance of asphalt improved.Compared with hot-mix asphalt mixture,adding Sasobit warm-mix agent can reduce the molding temperature of the mixture by 18℃,and significantly improve the high-temperature rutting resistance of the mixture,but it has adverse effects on the low-temperature cracking resistance and water stability of the mixture.The results show that the dynamic modulus of asphalt mixture increases with the increase of loading frequency or the decrease of temperature.At medium temperature(15℃,20℃),the dynamic modulus of mixture is mainly influenced by asphalt binder.At high temperature(37℃,54℃),the dynamic modulus of the mixture is more significantly affected by the mineral aggregate skeleton.
three indicatorsrheological propertiesroad performancedynamic modulus
万方数据
维普
