不同温度下沥青混合料的抗剪性能及其评价指标

为了分析不同温度下沥青混合料的抗剪性能,选用了SMA-16、Superpave-16、AC-16及AC-13这4种不同的沥青混合料,分别进行不同温度下的单轴贯入实验、APA车辙实验及单轴贯入疲劳试验,采用3种抗剪性能评价指标评价了这4种沥青混合料不同温度下的抗剪性能,同时对沥青混合料的抗剪评价指标的相关性进行了分析。分析结果表明:温度对沥青混合料的抗剪性能影响很大,对沥青混合料进行抗剪性能评价时应充分考虑其温度特性;抗剪强度、APA车辙深度及剪切模量具有很好的相关性。

Shear Resistance Performance of Asphalt Mixtures at Different Temperature and Its Evaluation Indexes

The shear resistance performance of asphalt mixtures at different temperature is researched.Four kinds of asphalt mixtures,SMA-16,Superpave-16,AC-16 and AC-13,are used in the tests.The optimum asphalt content of different asphalt mixtures is determined firstly,and the uniaxial penetration tests,APA rutting tests and repeating uniaxial penetration tests are carried out in order to get three shear resistance performance indexes of different asphalt mixtures at different temperature,which included Shear strength,APA rutting depth and Shear modulus.The relationship between different shear resistance performance indexes are also analyzed through experiment results in the paper.The results show that,temperature obviously influences shear resistance performance of asphalt mixture,environment temperature should be considered in shear resistance performance evaluation,and each of shear strength,APA rutting depth and shear modulus has great correlation with the other indexes.