SBS改性沥青混合料蠕变性能试验研究

Experimental Study on Creep Property of SBS Modified Asphalt Mixture

车辙主要产生于高温时沥青混合料的永久变形。基于此,对基质沥青混合料和SBS改性沥青混合料进行了不同温度及荷载水平下的单轴静载蠕变试验,分析了温度和荷载水平对沥青混合料蠕变特性的影响,并应用Burgers模型对试验进行了模拟。该试验结论指出,Burgers模型可较好地模拟蠕变试验的蠕变柔量曲线,并使用粘弹性理论分析了SBS改性沥青混合料具有较好热稳定性的原因。

Given the fact that rut usually arising from permanent deformation of mixture under high temperature, static uniaxial creep tests are carried out on base asphalt and SBS modfied asphalt mixture. Creep properties of hase and modified asphalt mixture under different temperature and load level are analyzed. Burgers model is applied to simulate the test and it is concluded that Burgers model is a better way to simulate the creep compliance curve of the creep test, and to elucidate the reason why modified bituminous mixture has better thermal stability with viscoelastic theory.