沥青混合料同轴剪切强度试验方法  

Investigation of Asphalt Mixture Co-axle Shear Strength Test Method

作　　者：章毅[1,2] 李立寒[1] 

机构地区：[1]同济大学交通运输工程学院,上海201804 [2]上海市城市建设设计研究总院,上海200125

出　　处：《同济大学学报（自然科学版）》2012年第8期1180-1184,共5页Journal of Tongji University:Natural Science

摘　　要：根据沥青路面混合料受力特点,讨论了同轴剪切强度试验的合理性.通过有限元计算,结合同轴剪切强度试验的破坏特征,确定了同轴剪切强度试验中最大剪应力的出现位置.定义1kN单位荷载作用下试件内最大剪应力为剪切强度系数,在普通温度(15～60℃)条件下,剪切强度系数基本不受温度和混合料模量变化的影响,且确定剪切强度系数值为0.140MPa.kN-1.车辙试验结果表明,沥青混合料同轴剪切强度与沥青混合料高温永久变形具有较好的相关性.This paper describes a specific laboratory test method for measuring asphalt mixture shear resistance, which is denominated as co-axle shear strength test. The test rationality and reliability are discussed and emphasized. According to finite element analysis results and co-axle shear test specimen failure plane, the position of max shear stress is determined then. The max shear stress in specimen under 1 kN unit vertical loading is defined as shear strength coefficient, which is hardly influenced by mixture modules in normal temperature range from 15 ℃ to 60 ℃. Then shear strength coefficients are given as a constant and equals to 0. 140 MPa . kN^-1. The regression analysis of laboratory test results shows good relationship between coxle shear strength and permanent deformation or DS.

关 键 词：沥青混合料 剪应力 车辙试验 同轴剪切强度 剪切强度系数 

分 类 号：U416.217[交通运输工程—道路与铁道工程]