不同废旧材料热再生沥青混合料的疲劳性能  

Fatigue Performance of Reclaimed Asphalt Mixture Based on Different RAP

作　　者：董玲云 黄刚[2] 何兆益[2] 

机构地区：[1]淮安市政设计研究院有限公司,江苏淮安223001 [2]重庆交通大学土木建筑学院,重庆400074

出　　处：《大连交通大学学报》2014年第2期71-75,共5页Journal of Dalian Jiaotong University

基　　金：国家自然科学基金资助项目(51278513);重庆市科技攻关基金资助项目(cstc2012ggA50001)

摘　　要：针对两种老化程度不同的废旧沥青混合料,分别进行不同RAP质量分数的再生沥青混合料配合比设计.并进行再生沥青混合料劈裂强度和间接拉伸疲劳试验,并通过加速老化前后疲劳特性的变化,对比分析不同RAP材料对再生沥青混合料疲劳特性的影响.试验结果表明,RAP老化程度严重的再生沥青混合料的劈裂强度大于RAP老化程度较轻的再生沥青混合料劈裂强度.RAP材料老化越严重,其再生沥青混合料的疲劳寿命越短,对应力的敏感性也就越低.According to two kinds of waste asphalt mixtures,the mix design of reclaimed asphalt mixture is determined,and the splitting strength test and indirect tensile fatigue test of the reclaimed asphalt mixture are carried out.Through the fatigue characteristics before and after accelerated aging,the reclaimed asphalt mixture fatigue characteristics with different RAP material are analyzed.Test results show that the splitting strength of the reclaimed asphalt mixture with serious aging degree of RAP is greater than the one of reclaimed asphalt mixture with less aging degree of RAP.If the RAP aging condition is more serious,the fatigue life is shorter and the stress sensitivity of the reclaimed asphalt mixture is lower.

关 键 词：废旧沥青路面材料 热再生沥青混合料 间接拉伸 疲劳特性 

分 类 号：U414[交通运输工程—道路与铁道工程]