乳化沥青冷再生混合料路用性能试验研究

Experimental Study on Road Performance of Cold Recycled Asphalt Mixture with Emulsified Asphalt

为了探讨乳化沥青冷再生混合料全面的性能参数，对0％-100％的6种不同RAP含量的乳化沥青冷再生混合料进行了室内试验研究与回归分析。结果表明：抗压回弹模量与抗压强度、劈裂抗拉强度与破坏劲度模量、弯拉应变与弯拉强度都随RAP用量的增加而呈线性减少；动稳定度随RAP用量的增加而呈指数函数减少；渗水系数随RAP用量的增加呈二次多项式减少；冻融劈裂强度比TSR随RAP用量的增加变化不大，但远低于规范的技术要求；同温下的抗压回弹模量与劈裂抗拉强度有较好幂函数关系。根据材料的抗压回弹模量与劈裂抗拉强度，把乳化沥青冷再生材料分主四类。

In order to discuss the performance parameters of cold reclaimed asphalt mixture with emulsified asphalt, laboratory tests and regression analysis on six mixtures having 0% to 100% RPA contents were carried out.The result shows that （1） all the compressive resilient modulus, compressive strength, split tensile strength, failure stiffness modulus, flexural-tensile strain and strength decrease linearly with the increment of RPA content; （2） both dynamic stability （DS） and water permeability coefficient decrease with RPA content following an exponential function and a quadratic polynomial function respectively; （3） the freezing-thawing split tensile strength rate （TSR） changes little with the increment of RPA content which is far below the requirement of standard and criteria; （4） the compressive resilient modulus and split tensile strength have a good power function relationship at the same temperature.According to the compressive resilient modulus and split tensile strength, the cold reclaimed asphalt mixture with emulsified asphalt was divided into four kinds.