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该文基于单位时间恢复的耗散蠕变应变能,建立了沥青混合料愈合率确定方法,并研究了4种不同沥青混合料的愈合特性。试验包括重复荷载试验和周期回弹模量试验。为了消除混合料损伤大小对愈合参数的影响,定义标准愈合率为DCSE/DCSEapplied。结果表明:当温度超过10℃时,沥青混合料的愈合率会显著增大,且集料结构特性(如集料骨架、沥青膜厚度和VMA)比聚合物改性剂的影响更大。
Based on the dissipative creep strain energy restored per unit time, a method to determine the healing rate of asphalt mixture was established and the healing characteristics of four different asphalt mixtures were studied. Tests include repeated load tests and periodic rebound modulus tests. In order to eliminate the effect of mixture size on the healing parameters, the standard healing rate was defined as DCSE / DCSEapplied. The results show that when the temperature exceeds 10 ℃, the healing rate of asphalt mixture will increase significantly, and the aggregate structure characteristics (such as aggregate skeleton, asphalt film thickness and VMA) have more influence than polymer modifier.