沥青含量对浇筑式沥青混凝土力学特性的影响  

Effect of asphalt content on mechanical properties of pouring asphalt concrete

作　　者：宋日英[1] 李明霞[1] 陈宇[1] 

机构地区：[1]华北水利水电学院资源与环境学院,河南郑州450011

出　　处：《人民长江》2011年第10期83-86,共4页Yangtze River

基　　金：郑州市创新科技人才计划领军人才项目(10LJRC185);教育部留学回国人员科研启动基金资助

摘　　要：浇筑式沥青混凝土是现在水利工程中防水心墙的主要材料,沥青含量是影响其力学性质的重要因素。在室内通过温控高压三轴仪,分别对沥青含量为8.5%,10.5%,12.5%的沥青混凝土试件进行了常规三轴试验。试验结果表明:温度为5℃及10℃时,试件的最大偏应力及切线模量系数K随沥青含量的增加而减小;黏聚力c随沥青含量的增加呈现出非线性减小;内摩擦角φ则随沥青含量的增加呈现出先增加后减少的趋势;试件的蠕变随沥青含量的增加而增加,蠕变速率增加的比例大于沥青含量增加的比例。Pouring asphalt concrete is the main waterproof material of core wall in water conservancy project,of which the asphalt content is an important factor affecting its mechanical properties.The asphalt concrete specimens with the asphalt content of 8.5%,10.5%,12.5% are respectively tested in the conventional triaxial tests.Test results are as follows： the maximum deviatoric stress and tangent modulus coefficient K of the specimens decreases as the asphalt content increases under temperature of 5 ℃,10 ℃;Cohesion c decreases non-linearly as the asphalt content increases;with an increase of asphalt content,internal friction angle increases first and drops later;creep of specimen increases with the asphalt content increases,and the increasing ratio of creep is larger than that of asphalt content.

关 键 词：沥青混凝土 偏应力 切线模量系数 内摩擦角 黏聚力 蠕变 

分 类 号：TV431.5[水利工程—水工结构工程]