南方地区混凝土基层沥青路面层间抗剪强度结构系数研究  

Research on Shear Strength Structure Coefficient of Concrete Base Asphalt Pavement in Southern China

作　　者：李盛[1] 刘朝晖[1] 李宇峙[1] 

机构地区：[1]长沙理工大学,湖南长沙410004

出　　处：《公路交通科技》2015年第4期28-33,共6页Journal of Highway and Transportation Research and Development

基　　金：国家自然科学基金项目(51178062);湖南省自然科学基金项目(14JJ7041);湖南省教育厅科学研究项目(14B001)

摘　　要：针对混凝土基层沥青路面的特点和现有研究的不足,提出了混凝土基层沥青路面适宜的层间结构与材料,测试了层间沥青材料的高温剪切性能与黏度;研发了层间剪切疲劳的测试装置,提出了层间剪切疲劳的试验方法;运用有限元法计算了混凝土基层沥青路面在高温季节层间温度与沥青层厚度的关系,确定了层间剪切疲劳的试验温度;通过测试和分析,提出混凝土基层沥青路面层间喷洒沥青的最佳用量为1.4 kg/m2,层间抗剪强度结构系数为KT=0.50N0.12e。Focusing on the characteristics and the flaws of existing studies of concrete base asphalt pavement, the appropriate interlaminar structure and material of concrete base asphalt pavement are proposed, and the high temperature shear performance and viscosity of interlaminar asphalt material are tested. A test apparatus for interlaminar shear fatigue is developed, and the test method of interlaminar shear fatigue is proposed. The relationship between interlaminar temperature and asphalt layer thickness in high temperature season is calculated by using FEM, and the test temperature of interlaminar shear fatigue is determined. By test and analysis, it is proposed that the optimum dosage of interlaminar spraying asphalt of concrete base asphalt pavement is 1.4 kg/m^2 , and the interlaminar shear strength structure coefficient is Krr =0. 50Ne^0.12

关 键 词：道路工程 混凝土基层沥青路面 有限元法 抗剪强度试验 剪切疲劳试验 

分 类 号：U416.224[交通运输工程—道路与铁道工程] U416.01