基于动荷载作用下的沥青混合料老化性能研究

Research on Aging Performance of Asphalt Mixture Based on Dynamic Loading

利用英国多功能气动沥青材料试验机Cooper NU—14测定了4种沥青混合料老化前、短期老化和长期老化后试件的动态间接拉伸劲度模量试验参数,分析了影响沥青混合料抗老化性能的相关因素。结果表明,短期老化是沥青混合料老化的主要阶段,空隙率、粗集料含量和沥青膜厚度对沥青混合料的老化性能有重要影响。

Employing multi-functional asphalt materials test machine imported from England, the dynamic indirect tensile stiffness modulus test parameters of original asphalt mixture.short-term aged asphalt mixture and long-term aged asphalt mixture were measured. And the factors of effecting aging performance of asphalt mixture were analyzed. The result shows that the short-term age is the main stage, the void ratio,the content of coarse aggregate and the asphalt film thickness have important influence on aging performance of asphalt mixture.