水-温-光循环作用下沥青混合料性能衰减研究  

Attenuation performance of asphalt mixture under water-temperature-radiation cycle action

作　　者：程永春[1] 张鹏[1] 焦峪波[1] 陶敬林 

机构地区：[1]吉林大学交通学院,吉林长春130025

出　　处：《哈尔滨工程大学学报》2013年第8期990-994,共5页Journal of Harbin Engineering University

基　　金：国家自然科学基金资助项目(51278222);吉林大学研究生创新基金资助项目(20121079)

摘　　要：为了更准确地模拟夏季高温多雨气候影响下沥青路面性能的变化情况,针对降水、高温和日照3种环境因素综合作用的特点,设计了室内水-温-光循环试验.定量分析了不同油石比情况下,沥青混合料在经历不同水-温-光循环次数后的空隙率、饱水率、劈裂抗拉强度及冻融劈裂抗拉强度的变化规律.提出了衰减系数的概念,并建立了劈裂抗拉强度和冻融劈裂抗拉强度衰减模型.研究结果表明:在水-温-光循环作用下,油石比的增大可以减小空隙率和饱水率的变化,也可以抵制沥青混合料的强度和水稳定性的衰减,但对其初期强度和水稳定性是不利的.In order to accurately simulate the attenuation performance of the asphalt mixture in the hot and rainy cli-mate in summer, and assess the combined action of rainfall, high temperature and sunshine, the experiment of wa-ter-temperature-radiation circulation was designed. The changes of air void, saturated water ratio, split tensile strength and freeze-thaw splitting tensile strength were quantitatively analyzed under the condition of different water-temperature-radiation cycle times and different asphalt-aggregate ratios. The concept of 'attenuation coefficient'was put forward and attenuation models of split tensile strength and freeze-thaw splitting tensile strength were estab-lished. The results show that, under the effect of water-temperature-radiation cycle, the asphalt mixture of higher asphalt-aggregate ratio can mitigate the change of air void and saturated water ratio, as well as the attenuation of as-phalt mixture strength and water stability. However, it is adverse for the initial strength and water stability of the as-phalt mixture.

关 键 词：水-温-光循环 沥青混合料 油石比 性能衰减规律 衰减模型 

分 类 号：U416.1[交通运输工程—道路与铁道工程]