基于车辙试验的沥青混合料车辙评价指标分析

摘要

在不同温度和应力条件下对AC-20沥青混合料进行了车辙轮碾试验,同时利用试验结果对几种车辙评价指标进行了对比分析.研究表明,动稳定度指标随温度和应力改变存在异常变化,不能够比较全面的评价沥青混合料的车辙性能;综合稳定指数和变形率两个车辙评价指标与车辙深度的相关性较之动稳定度更好.在室内车辙试验的基础上,综合稳定指数和变形率能够更合理的评价沥青混合料的高温车辙性能.%Rutting test on AC-20 asphalt mixture was conducted under different conditions of temperature and stress states,and several rutting evaluation indexes were compared based on the test results.The results show that the dynamic stability index changes abnormally with temperature and stress and will not be able to comprehensive evaluation the rutting performance of asphalt mixture.The correlation between complex stability index,deformation rate and rutting depth is better than that of dynamic stability.Based on the rutting test,the complex stability index and deformation rate can evaluate the high temperature rutting performance of asphalt mixture more rationally.