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为了研究岩沥青改性沥青混合料的动态特性,应用简单性能试验机(SPT)测试了不同掺量岩沥青改性沥青混合料在不同温度和荷载频率下的动态模量与相位角,分析频率、温度对沥青混合料动态特性的影响。通过非线性最小二乘法采用Sigmoidal模型拟合沥青混合料动态模量曲线,根据时-温等效原理,确定了沥青混合料动态模量主曲线,结果表明:岩沥青改性沥青混合料可以有效提高混合料的动态模量,改善其力学性能。
In order to study the dynamic properties of rock asphalt modified asphalt mixture, the dynamic modulus and phase angle of rock asphalt modified asphalt mixture with different content of rock asphalt at different temperature and loading frequency were tested by the simple performance testing machine (SPT) , Temperature on the dynamic characteristics of asphalt mixture. According to the time-temperature equivalence principle, the main curve of dynamic modulus of asphalt mixture was determined by nonlinear least square method using Sigmoidal model to fit the dynamic modulus curve of asphalt mixture. The results show that the rock asphalt modified asphalt mixture can be effective Improve the dynamic modulus of the mixture, improve its mechanical properties.