Abstract: Paving anti-cracking materials is the major measure to prevent reflective cracks in asphalt overlay，the parameters of the material have great impact on anti-reflective cracks. Firstly，based on fracture mechanics theory，the stress intensity factor of the overlay was calculated by means of finite element analysis program，then，the impact of width，thickness， modulus and adhesive coefficient of anti-cracking materials on anti-cracking effect were analyzed through grey correlation entropy. The results show that adhesive property is the most important parameter which can influence the effect of antireflective cracks.

Key words: anti-cracking material, stress intensity factor, influencing parameter, gray correlation entropy

摘要： 在层间铺设防裂材料是防止加铺层出现反射裂缝的主要措施，防裂材料的自身参数对其防裂效果有重要影 响。首先基于断裂力学理论，通过有限元程序计算了在车辆荷载应力及温度应力作用下加铺层裂缝尖端的应力强 度因子，然后采用灰关联熵分析法分析了防裂材料的宽度、厚度、模量及黏结系数等参数对其防裂效果的影响程 度。分析结果表明，防裂材料与上下层间的黏结性能是影响其防裂效果的最重要参数。

关键词: 防裂材料, 应力强度因子, 影响参数, 灰关联熵