SMA沥青混合料疲劳性能改善措施综述

Review of Improvement Measures for Fatigue Performance of SMAMixture

疲劳开裂是沥青路面在服役过程中出现最多的病害之一。针对沥青混合料的疲劳性能展开研究,提高路面结构的耐久性能是至关重要的。在道路建设过程中使用SMA结构已经成为一种主要的选择,因此,从SMA沥青混合料的性能、组成特点和形成机理入手,综述了SMA沥青混合料疲劳性能改善的现状。目前,研究较多的是主流沥青混合料中采用的纤维外加剂的路用性能,诸多的纤维物理力学性质优良,如木质素纤维、玄武岩纤维和聚合物纤维等。通过多种外加剂的应用可知,SMA沥青混合料疲劳性能现阶段已经得到了特别的关注,采用多种方法能够有效地改善SMA沥青混合料的疲劳性能。

Fatigue cracking is one of the most diseases of asphalt pavement in service.It is very important to study the fatigue improvement of asphalt mixture and improve the durability of pavement structure.The stone mastic asphalt(SMA)structure has become a major choice in the process of road construction.Therefore,starting with the performance,composition characteristics and formation mechanism of SMA,the current situation of fatigue improvement of SMA asphalt mixture was summarized in this paper.There are many studies on the road performance of fiber admixtures of the current mainstream asphalt mixture.Many fibers have excellent physical and mechanical properties,such as lignin fiber,basalt fiber and polymer fiber.Through the analysis of a variety of admixtures,it can be seen that the fatigue performance of SMA mixture has received special attention at this stage,Many methods can effectively improve the fatigue performance of SMA mixture.