基于半圆试件的沥青混合料动态模量测试方法研究

由于单轴压缩动态模量难以用于路面芯样试件，导致设计模量评价方法难以用于路面质量符合性检验。本文在分析半圆试件荷载响应的基础上开发了基于半圆试件的动态模量测试方法，确定了试验参数，对常用沥青面层混合料进行了动态模量测试。试验结果表明通过三维有限元方法确立的应力系数有很好的精度，得到的动态模量符合精度要求。对试验数据的变异系数分析表明试验结果的离散性和复现性偏差均较小，说明试验方法具有很好的稳定性。

Test method study of asphalt mixture dynamic modulus based on the semi circular specimens

The uniaxial compression modulus is difficult to be used into pavement core which lead to the Design modulus is difficult to be used into pavement quality compliance examination. The dynamic modulus test method was developed based on semi-circular bending test, and the test parameters were decided. The dynamic modulus of familiar pavement asphalt mixture was test on the new developed method. The test show that stress coefficient has a good precision which is established on the three-dimensional finite element , and the dynamic method accord with the precision request. Analysis of the variation coefficient of test date indicate that the disperse and windage of results were very small which show the method has a good stability.