基于DMA方法的沥青胶浆微观结构

采用动态力学分析(DMA)方法对沥青胶浆的微观结构进行了研究,通过对沥青胶浆的动态黏弹性能的变化规律以及Han曲线的温度依赖性进行分析。比较了沥青胶浆和改性沥青胶浆的相态结构的区别,并且根据沥青及沥青矿粉胶浆的损耗因子tanδ计算出参数A,用来评价沥青与胶浆的界面粘结程度。研究结果表明了用DMA方法可以很好地研究沥青胶浆的微观结构,从而为更好地改善沥青胶浆的路用性能提供了理论依据。

Microstructure of asphalt mastic using dynamic mechanical analysis

The dynamic mechanical analysis(DMA) was used to study the microstructure of asphalt mastic,according to the temperature dependence of Han curve,frequency dependence of dynamic viscoelastic properties,such as storage modulus,loss modulus and phase angle.The differences of phase morphology between the base asphalt mastic and the modified asphalt mastic were compared,and the parameter A which is calculated from the loss factor tanδ of asphalt and asphalt mineral powder mastic to evaluate the interfacial interaction of asphalt and mastic.It is proved that the DMA is effective to research the microstructure of asphalt mastic,rendering a theoretical basis for further improvement of the road compatibility of asphalt mastic.