热拌及温拌再生沥青混合料疲劳特性研究  

Study on Fatigue Characteristics of Hot-mix and Warm-mix Recycled Asphalt Mixtures

作　　者：王火明[1,2] 姚森 张跃 宋兴华 曾祥倩 WANG Huoming;YAO Sen;ZHANG Yue;SONG Xinghua;ZENG Xiangqian(China Merchants Chongqing Communications Technology Research and Design Institute Co.,Ltd.,Chongqing 400067;Chongqing Jiaotong University,Chongqing 400074;China Construction Xinjiang Jiangong Civil Engineering Co.,Ltd.,Urumqi,Xinjiang 830063)

机构地区：[1]招商局重庆交通科研设计院有限公司,重庆400067 [2]重庆交通大学,重庆400074 [3]中建新疆建工土木工程有限公司,乌鲁木齐830063

出　　处：《公路交通技术》2023年第2期39-44,共6页Technology of Highway and Transport

摘　　要：为了在路面养护工程中更好地利用再生沥青混合料,设计了RAP掺量均为80%的热拌及温拌再生沥青混合料,对其进行四点弯曲疲劳试验,采用耗散能法分析普通再生剂和温拌再生剂对再生沥青混合料疲劳性能的影响,并与新拌沥青混合料进行对比。结果表明:1)温拌再生沥青混合料的疲劳性能虽不及新拌沥青混合料,但显著优于热拌再生沥青混合料;2) 3种沥青混合料达到疲劳破坏时的累积耗散能和疲劳寿命在双对数坐标系中均呈现出良好的线性关系,且此关系不受再生剂种类及是否掺加RAP的影响,由此可通过线性拟合得到用累积耗散能表示的疲劳方程。In order to make better use of reclaimed asphalt mixture in pavement maintenance engineering,the hot mix and warm mix reclaimed asphalt mixture with RAP content of 80%were designed.The fourpoint bending fatigue test was carried out on them.The dissipated energy method was used to analyze the influence of common and warm mix on the fatigue performance of reclaimed asphalt mixture,and the comparison was made with the new mix.The results show that the fatigue performance of reclaimed asphalt mixture with warm mix is significantly better than that of reclaimed asphalt mixture with hot mix,although it is not as good as that of fresh asphalt mixture.At the same time,it is also found that the cumulative dissipated energy and fatigue life of the three asphalt mixtures when fatigue failure is achieved show a good linear relationship in the double logarithmic coordinate system,which is not affected by the test conditions,and fatigue equation represented by cumulative dissipated energy can be obtained by linear fitting.

关 键 词：再生沥青混合料 热拌及温拌 四点弯曲疲劳试验 耗散能法 疲劳性能 

分 类 号：U414[交通运输工程—道路与铁道工程]