热再生沥青混合料的疲劳特性研究  

Research on Fatigue Properties of Reclaimed Asphalt Pavement

作　　者：董玲云[1] 何兆益[1] 黄刚[1] 王国伟[1] 侯俊[2] 

机构地区：[1]重庆交通大学土木建筑学院,重庆400074 [2]重庆重交再生资源开发有限公司,重庆401120

出　　处：《重庆交通大学学报（自然科学版）》2013年第4期606-609,共4页Journal of Chongqing Jiaotong University(Natural Science)

基　　金：国家自然科学基金项目(51278513);重庆市科技攻关项目(cstc2012ggA50001)

摘　　要：针对渝长高速公路废旧沥青混合料,对新拌沥青混合料AC-16和RAP掺量分别为10%,30%,50%的再生AC-16进行长期老化前后的间接拉伸疲劳试验。引入疲劳寿命比Nf(k/n)和疲劳寿命损失率F(k)的概念,对再生沥青混合料疲劳特性的变化规律进行了系统评价。试验结果表明:随RAP掺量的增加,再生沥青混合料的疲劳寿命比降低,且老化后的疲劳寿命比要小于老化前,且疲劳寿命损失率增加。Aiming at RAP(reclaimed asphalt pavement) of Yu-Chang freeway,the indirect tensile fatigue tests are carried out between a fresh asphalt mixture of AC-16 and the reclaimed AC-16 with RAP mixing amount 10,30,and 50 respectively,before and after the long-term aging.The fatigue life ratio Nf(k / n) and fatigue life loss ratio F(k) are introduced to systematically analyze the variation of the fatigue properties of the reclaimed asphalt mixture.Test results show that: with the increase of RAP amount,the reclaimed asphalt mixture fatigue life ratio decreases;meanwhile,the age of fatigue life ratio of the reclaimed asphalt mixture is less than that before aging,and the fatigue life loss ratio increases.

关 键 词：再生沥青混合料 间接拉伸 疲劳特性 疲劳寿命比 疲劳寿命损失率 

分 类 号：U414[交通运输工程—道路与铁道工程]