基于动态力学分析对改性沥青粘弹性能的研究

鉴于目前的沥青粘弹性能评价指标对改性沥青的适用性较差，采用动态力学分析方法对基质沥青和改性沥青进行研究，测定了不同温度和频率下沥青的粘弹性能参数，通过Han曲线和动态粘弹参数的变化规律分析其粘弹性能，结果表明改性沥青由于其相态结构比较复杂，导致其粘弹性能不同于基质沥青，采用动态力学方法能很好的揭示改性沥青的宏观力学性能与其微观结构的相关关系。

The Study of the Viscoelastic Properties of Modified Asphalt Based on Dynamic Mechanical Analysis

The viscoelastic evaluation index using has led to a better discrimination between various base asphalts, however it is not enough to capture the performance of modified asphalt. The microstructure of modified asphalt has a pronounced influence on the viscoelastic properties of modified asphalt. Dynamic mechanical analysis was used to study the viscoelastic properties of base asphalt and SBS modified asphalt, according to the temperature dependence of Han curve, frequency dependence of dynamic viscoelastic properties, such as loss modulus and phase angle. But the complexity of morphology of modified asphalt leads to the great viscoelasitc properties difference between base asphalt and modified asphalt. It is proved that DMA is effective to research the microstructure and viscoelastic properties of modified asphalt.