高模量沥青混合料模量的试验研究

沥青混合料模量是沥青路面结构分析的重要计算参数.对3种高模量沥青混合料及SBS改性沥青混合料和A-70沥青混合料进行动态模量和静态回弹模量试验,分析沥青混合料模量分布规律、影响因素以及动态模量与静态回弹模量的相关性.结果表明:相同试验条件下高模量沥青混合料的模量明显大于对比沥青混合料,且随着频率的降低,高模量沥青混合料的动态模量增大倍数增大;沥青混合料的静态回弹模量与低频下的动态模量呈指数关系,因此当试验条件受限时可采用沥青混合料静态回弹模量值对动态模量值进行预估.

Modulus of High Modulus Asphalt Mixture

The modulus of asphalt mixture is an important parameter for asphalt pavement structure analysis. In the research, the dynamic modulus and static resilient modulus tests were conducted for three kinds of high modulus asphalt mixture, SBS modified asphalt mixture and A-70# asphalt mixture, the distribution rule and influencing factors of modulus and the correlation between two kinds of modulus were analyzed. The results suggest that the modulus of high modulus asphalt mixture is significantly larger than that of the contrast asphalt mixture at the same testing conditions, and the magnification increases with frequency decrease. The static resilient modulus of asphalt mixture has an exponential relation with dynamic modulus at the low frequency, and the values of static resilient modulus can be used to estimate the dynamic modulus values when the test conditions is limited.