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为了研究应变测试方法、加载频率、试验温度和应力幅值对沥青混合料动态压缩弹性模量的影响,用MTS路面材料动态试验系统对常用的两种沥青混合料AC-16和AC-20的动态压缩弹性模量进行了系统的测试,通过分析建立了各因素与动态压缩弹性模量之间的关系,以及动态与静态弹性模量的关系.结果表明,采用侧面法测定的结果与现行规范中的推荐值更接近,也能够消除由顶面法引起的试件端面的接触误差,建议在静态和动态模量试验中首选侧面法,在动态测试中要选择合适的加载频率,使得试验结果的偏差系数控制在20%以下.
In order to study the influence of strain test method, loading frequency, test temperature and stress amplitude on the dynamic compressive elastic modulus of asphalt mixture, MTS pavement material dynamic test system was used to study the effect of two kinds of common asphalt mixture AC-16 and AC-20 Dynamic compressive modulus of elasticity was systematically tested and the relationship between each factor and dynamic compressive elastic modulus was established and the relationship between dynamic and static elastic modulus was established.The results showed that the results of the lateral method and the current code In the recommended value is closer, but also to eliminate the top surface caused by contact with the specimen surface error, it is recommended in the static and dynamic modulus test preferred side method, the dynamic test to choose the appropriate loading frequency, the test results The deviation coefficient is controlled below 20%.