沥青混凝土疲劳损伤自愈合行为研究进展(3) 自愈合理论与行为方程

Review on Self-Healing Behavior of Asphalt Concrete(3) Theory and Behavior Equation of Self-Healing

自沥青混凝土具有疲劳损伤自愈合能力得到试验和实践验证以来,自愈合理论与行为方程成为研究重点。但由于沥青混凝土自愈合行为的复杂性,其理论研究多停留于基于宏观表现认知的推测,只是近年来才取得一些进展,主要形成了基于裂缝表面能、裂缝表面分子扩散和沥青毛细流动的三种沥青混凝土疲劳损伤自愈合理论,并建立了各自的行为方程。本研究评述了三种沥青混凝土疲劳损伤自愈合理论的科学基础、建立方法和研究发展,分析了不同理论和行为方程的适用条件。

Since the self-healing behavior of asphalt concrete was confirmed, the theory and behavior equation had been the research focus. However, because of the complexity of self - healing behavior, most of the researches were conjectured basing on the macroscopic performance of asphalt concert until recent years some progress had been made. Three kinds of self- healing theories based on crack surface energy, crack sur- face molecular diffusion and capillary flow were developed and the corresponding behavior equations were set up. The article reviewed the scientific basis, building method and research development of the three theories, and analyzed their applicable conditions.