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由于沥青混合料特有的粘弹性力学特性和易受温度影响的性质,使得路面在通车后就出现车辙病害。笔者利用Burgers粘弹性模型,推导了室内循环荷载作用下单层车辙板的永久变形公式。对添加车辙王、SBS改性沥青和普通基质沥青的AC-20C型混合料进行不同温度下的室内车辙试验。利用1stopt软件反算出3种不同类型混合料的Burgers粘弹性模型的粘弹性参数,分析了不同添加剂及温度与粘弹性参数的关系,希望为沥青混合料的设计提供参考。
As a result of the unique viscoelasticity of asphalt mixture and its susceptibility to temperature, rutting occurs after the road is opened. Based on the Burgers viscoelastic model, the author derives the permanent deformation formula of single layer rutting board under cyclic loading. The indoor rutting test of AC-20C-type mixture with rutting king, SBS modified asphalt and common matrix asphalt at different temperatures was carried out. Using the 1stopt software, the viscoelastic parameters of Burgers viscoelastic model of three different types of mixtures were contrasted. The relationship between different additives and temperature and viscoelastic parameters was analyzed. It is hoped that the reference will be provided for the design of asphalt mixture.