国产环氧沥青混合料固化强度增长规律研究  

Research on strength developing law during the curing of domestic epoxy asphalt mixture

作　　者：钱振东[1] 王亚奇[1] 沈家林[1] 

机构地区：[1]东南大学智能运输系统研究中心,南京210096

出　　处：《中国工程科学》2012年第5期90-95,共6页Strategic Study of CAE

基　　金：国家科技支撑计划资助项目(2009BAG15B03)

摘　　要：研究了环氧沥青混合料的强度形成机理,在此基础上对影响环氧沥青混合料强度的两个重要因素即混合料的容留时间、养生温度进行了研究,确定了不同温度下环氧沥青混合料的容留时间范围及强度增长规律;采用差示扫描量热法(DSC)测得环氧沥青结合料在不同升温速率下的动态DSC曲线,通过非线性回归求得固化动力学关键参数,建立环氧沥青结合料的固化反应模型。研究结果可以指导环氧沥青混合料的生产与施工,同时对铺装层开放交通时间的确定有参考意义。Based on the mechanism of strength, the reserved time and curing temperature of epoxy asphalt mixture are studied as the influencing factors of strength, and the range of reserved time and the strength increasing law of epoxy asphalt mixture in different temperatures are determined. Then dynamic differential scanning calorimeter （DSC） curve of epoxy asphalt mixture at different heating rates is measured using DSC. We use the method of nonlinear regression to obtain the key parameters of curing kinetics. Then the model of curing reaction of epoxy asphalt binder is established. The results can guide the production and construction of epoxy asphalt mixture. Meantime, it also can provide reference value on when to open the paving layer to traffic.

关 键 词：环氧沥青 强度增长 时温条件 固化反应模型 

分 类 号：U443.33[建筑科学—桥梁与隧道工程]