温拌再生沥青混合料的疲劳性能  

Fatigue Performance of Warm Recycled Asphalt Mixture

作　　者：杨丽英[1,2] 谭忆秋[1] 董雨明 李恩光 

机构地区：[1]哈尔滨工业大学交通科学与工程学院,哈尔滨150090 [2]北京市政路桥建材集团有限公司,北京102600

出　　处：《公路交通科技》2012年第10期7-10,21,共5页Journal of Highway and Transportation Research and Development

基　　金：国家国际科技合作项目(2010DFB83490)

摘　　要：通过沥青路面旧料分析和再生沥青混合料配合比设计,确定了温、热再生沥青混合料的配合比。在矿料合成级配基本相同的情况下,温拌再生沥青混合料中的旧沥青混合料用量可提高到45%,同时能保证沥青混合料具有良好的性能,从而突破了热再生技术中旧料比例不超过30%的技术难题。采用四点弯曲试验分别对热拌、温再生和热再生沥青混合料进行了疲劳试验。结果表明:温拌再生沥青混合料的疲劳性能虽然不及热拌沥青混合料,但明显优于热再生沥青混合料,尤其是在高应变水平下,温拌再生沥青混合料的疲劳作用次数可达到热再生混合料的1.5倍。The mix proportions of warm and hot recycled asphalt mixtures were determined after reclaimed asphalt mixture （RAP） analysis and its mix design. With similar aggregates gradation, the content of RAP in warm recycled asphalt mixture can be increased to 45% , and good performance of warm recycled mixture can be guaranteed. Thus the restriction of 30% RAP in asphalt mixture was surpassed. With the method of four- point bending test, the fatigue performance of warm recycled asphalt mixture, its hot counterpart and HMA were tested. The testing result illustrate thats although the fatigue performance of warm recycled asphalt mixture is not as good as that of HMA, it is superior to that of hot recycled asphalt mixture, especially under high stress level, the fatigue life of warm recycled asphalt mixture is 1.5 times the fatigue life of hot recycled asphalt mixture.

关 键 词：道路工程 疲劳性能 四点弯曲试验 温拌再生沥青混合料 配合比 RAP 

分 类 号：U416.217[交通运输工程—道路与铁道工程]