基于简单性能试验的环氧沥青混合料动态模量研究

Study on Dynamic Modulus of Epoxy Asphalt Mixture Based on Simple Performance Test

为了探索钢桥面铺装用热固性环氧沥青混合料的动态模量规律,首先通过简单性能试验(SPT)分析了不同影响因素下环氧沥青混合料动态模量值的变化规律,并将其同其他常用沥青混合料的动态模量进行对比;进而根据时温等效原理,通过最小二乘拟合分析建立了环氧沥青混合料动态模量的预估模型.结果表明:环氧沥青混合料的动态模量值比相同试验条件下其他材料的动态模量值大,同时,环氧沥青混合料的动态模量值随温度的升高而减小,随加载频率的升高而增大.最后建立了参考温度为20℃时环氧沥青混合料的动态模量主曲线,为环氧沥青桥面铺装的设计与分析提供了材料动态参数.

In order to make sure the mechanism of the dynamic modulus of the thermosetting epoxy asphalt mixture（EAM） for steel bridge pavement, and to establish its master curve, the dynamic modulus of EAM was tested and analyzed based on the simple performance test（SPT）, and compared with the dynamic mod- ulus with other two ordinary asphalt mixtures. According to the time-temperature superposition theory, the dynamic modulus master curve of the EAM was established through a least squares regression analysis. The result shows that dynamic modulus of the EAM is significantly larger than the other two mixtures, on the other hand, the dynamic modulus of EAM decreases with the temperature increasing and increases with the frequency increasing. At last, the dynamic modulus master curve of EAM at 20 ℃ is established. The master curve can provide material parameter to the dynamic design and analysis of the epoxy asphalt pave ment on steel bridge deck.