乳化沥青碎石非线性回弹模量研究  

Nonlinear Resilient Modulus of Emulsion Treated Aggregate

作　　者：李鹏[1,2] 李小楠[3] 

机构地区：[1]长安大学公路学院,陕西西安710064 [2]新疆交通建设集团股份有限公司,新疆乌鲁木齐830001 [3]中国交通通信信息中心,北京100011

出　　处：《筑路机械与施工机械化》2016年第10期46-49,53,共5页Road Machinery & Construction Mechanization

基　　金：国家自然科学基金青年科学基金项目(51408043)

摘　　要：研究采用动态加载的三轴试验测试乳化沥青碎石在不同应力状态下的回弹模量,并研究沥青含量、集料特性和温度对模量的影响。试验结果显示:乳化沥青碎石的回弹模量具有很强的应力依赖特性,随着体应力的增加,回弹模量显著增加;随八面体剪应力增加,回弹模量值减小;并且其回弹模量受沥青含量、集料特性和温度的影响,其中温度为最主要影响因素。进一步,基于MEPDG回弹模量模型,研究提出了乳化沥青碎石的回弹模量预估模型。Dynamic triaxial test was used to measure the resilient modulus of emulsion treated aggregate in different stress states. The influencing factors, including binder content, aggregate properties and temperature, were put into consideration. It has been found out that the resilient modulus of emulsion treated aggregate exhibits strong stress dependent properties. The resilient modulus increases as bulk stress increases, or otherwise when octahedral stress increases. Resilient modulus is also affected by binder content, aggregate properties and temperature. Among these factors, the temperature is the primary one. Further more, a prediction model based on the MEPDG model was proposed to estimate the resilient modulus of emulsion treated aggregate.

关 键 词：乳化沥青碎石 动三轴试验 回弹模量 应力依赖特性 

分 类 号：U416.2[交通运输工程—道路与铁道工程]