寒区有水模式下沥青混合料矿料界面力学性能研究  

Research on Interfacial Mechanical Properties of Asphalt Mixture with Water Pattern in Cold Region

作　　者：李杨 王琦智 郑传峰[3] LI Yang;WANG Qi-zhi;ZHENG Chuan-feng(Jilin Communications Polytechnic,Changchun 130062,China;CCCC Fourth Highway Engineering Co.Ltd.,Beijing 100022,China;College of Construction Engineering,Jilin University,Changchun 130021,China)

机构地区：[1]吉林交通职业技术学院,长春市130062 [2]中国交通建设第四公路工程局有限公司,北京市100022 [3]吉林大学建设工程学院,长春市130021

出　　处：《公路》2022年第1期32-35,共4页Highway

基　　金：国家自然科学基金项目,项目编号51508223;吉林省自然科学基金项目,项目编号20160101267JC。

摘　　要：研究沥青混合料在有水介入时其矿料界面的低温黏结性能衰减效应。基于矿料界面强度测试试验,分析了不同荷载效应(拉伸荷载及剪切荷载)及不同温度条件(-10℃、-20℃及-30℃)下水对矿料界面的黏结强度的影响。试验结果表明,在持续的低温环境中一旦有水介入,矿料界面的黏结强度有很大幅度的衰减,不同温度条件下衰减的幅度存在差异,矿料界面黏结强度残值也显著不同。客观条件下水介入导致的矿料界面黏结强度衰减是低温区沥青混合料开裂破坏的一个显著诱因,现阶段低温区道路表面的封水及防渗设计应被充分关注。In the paper the attenuation effect of low-temperature cohesive performance of asphalt mixture with the involvement of water is studied. Based on the test of mineral aggregate interface strength, the influences of different load effects(tensile load and shear load) and different temperature conditions(-10℃,-20℃ and-30℃) on the cohesive strength of the mine interface are analyzed. The results show that once water involves in the continuous low-temperature environment, the cohesive strength of mineral aggregate interface has great amplitude attenuation, and the attenuation of amplitude varies under different temperature conditions, mineral aggregate interface cohesive strength residual value is also significantly different. Objective conditions caused by the involvement of water in the mineral aggregate interface cohesive strength attenuation is a significant cause for the crack of asphalt mixture in low-temperature zone, and the sealing water and anti-seepage design of road surfaces in low-temperature zone should be given sufficient consideration.

关 键 词：沥青混合料 界面强度 拉伸 剪切 衰减 

分 类 号：U419.92[交通运输工程—道路与铁道工程]