沥青回收料对温拌沥青混合料疲劳性能的影响

Evaluation of the effect of recycled asphalt pavement on the fatiguePerformance of warm mix asphaltmixtures

对含有沥青路面回收料(RAP)的温拌沥青混合料在添加和不添加再生剂的情况下的刚度模量和疲劳寿命进行了试验研究。使用Sasobit和Asphamin作为两种最常见的温拌剂材料生产温拌沥青,制备并测试了五种混合料:一种含有30%RAP的热拌沥青混合料;两种含有30%RAP+温拌剂的混合料;两种含有30%RAP+温拌剂和再生剂的混合料。结果表明,含有RAP的温拌沥青混合料与含有RAP的热拌沥青混合料的刚度模量没有显著差异。间接拉伸疲劳试验结果表明,温拌剂和再生剂的加入提高了混合料在不同温度下的疲劳寿命。

This paper presented an experimental study to characterize the stiffness modulus and fatigue life of warm mix asphalt mixture containing recycled asphalt pavements(RAP)with and without a rejuvenating agent.For this purpose,warm mix asphalts were produced using Sasobit and Asphamin as two of the most common additive materials.The following five mixes were prepared and tested:a hot plate asphalt mixture with 30%RAP,two mixes with 30%RAP plus warm mix asphalt additives,and two mixes with 30%RAP plus warm mix asphalt additives and a rejuvenating agent.The results indicated no significant difference in the stiffness modulus of warm mix asphalt mixtures containing RAP and conventional mixtures including recycled asphalt pavement.However,the indirect tensile fatigue test results showed that the addition of the warm mix asphalt additives and rejuvenating agent improved the fatigue life of the mixtures at different temperatures.