Abstract: Through indoor simulation of high-cold and large temperature difference conditions, the changes of asphalt performance under high-cold and large temperature difference conditions were studied by using asphalt penetration, softening point, ductility, bending creep stiffness and dynamic shear rheology tests. The results show that the variation range of each index of asphalt is small, and the influence of high-cold and large temperature difference conditions on the performance of asphalt is small. The performance change of asphalt mixture under high-cold and large temperature difference conditions was studied by using TSRST, low-temperature bending and freeze-thaw splitting tests. The results show that the condition of high-cold and large temperature difference has a great influence on the low temperature performance of asphalt mixture. The type of asphalt and asphalt mixture has a significant influence on the performance of asphalt mixture under high-cold and large temperature difference conditions, among which the modified asphalt is better than the matrix asphalt, and SMA asphalt mixture is better than AC asphalt mixture.

Key words: highway engineering; asphalt pavement; high cold and large temperature difference; road performance; asphalt mixture

摘要： 通过室内对高寒大温差条件进行模拟，利用沥青针入度、软化点、延度、弯曲蠕变劲度及动态剪切流变等研究了高寒大温差条件下沥青性能的变化。研究表明：沥青各项指标变化幅度较小，高寒大温差条件对沥青的性能影响较小。利用约束试件温度应力、低温弯曲及冻融劈裂等试验研究高寒大温差条件下沥青混合料性能变化。结果表明：高寒大温差条件对沥青混合料低温性能影响较大，沥青和沥青混合料类型对高寒大温差条件下混合料的性能存在显著影响，其中改性沥青优于基质沥青，SMA类沥青混合料优于AC类沥青混合料。

关键词: 道路工程；沥青路面；高寒大温差；路用性能；沥青混合料