基于第二主应力的沥青混合料强度试验研究  

Experiment on Strength of Asphalt Mixture Based on Second Principal Stress

作　　者：锁利军[1,2] 王秉纲[1] 郑传超[1] 

机构地区：[1]长安大学特殊地区公路工程教育部重点实验室,陕西西安710064 [2]洛阳理工学院土木工程系,河南洛阳471023

出　　处：《郑州大学学报（工学版）》2015年第1期79-82,共4页Journal of Zhengzhou University（Engineering Science）

基　　金：河南省科技攻关计划资助项目(102102310271)

摘　　要：沥青混合料的强度理论与沥青混合料试验方法都未考虑第二主应力对沥青混合料强度的影响.为了研究第二主应力与沥青混合料强度的关系,选定第二主应力、试验温度和加载速率三个因素进行了正交试验设计,据此完成了沥青混合料强度试验.试验结果表明,正温时有第二主应力的沥青混合料的强度明显大于无第二主应力的相应结果,而在零度和负温度时,有第二主应力的沥青混合料的强度与无第二主应力的相应结果相差不大.考虑各因素的交互作用,对给定显著水平α=0.05的正交试验显著性分析表明:温度大于零度时,对沥青混合料强度显著性影响的强弱顺序是第二主应力、试验温度和加载速率;在零度和负温度时,对沥青混合料强度显著性影响的强弱顺序是试验温度、加载速率和第二主应力.Both strength theory of Mohr-Coulomb and testing methods,which are used to value strength of asphalt mixture in specification,do not include second principal stress. In order to study influence of second principal stress on strength of asphalt mixture,strength of asphalt mixture in different condition is tested on the base of orthogonal experimental design,which includes three factors,such as temperature,loading velocity and second principal stress. Experimental results show that strength of asphalt mixture with the second principal stress is obviously larger than the corresponding results without the second principal stress when it is positive temperature. However,there is a little difference in strength between asphalt mixture with second principal stress and one without second principal stress when it is negative temperature. The results also show that,for a given significant level,orthogonal experimental design significance analysis in positive temperature shows that second principal stress has the most obvious influence on strength of asphalt mixture,as followed by temperature and loading velocity. On the other hand,orthogonal experimental design significance analysis in negative temperature shows that temperature has the most obvious influence on strength of asphalt mixture,as followed by loading velocity and second principal stress.

关 键 词：道路工程 沥青混合料 强度 第二主应力 正交试验设计 

分 类 号：U416.01[交通运输工程—道路与铁道工程]