热拌及温拌再生SMA沥青混合料疲劳性能分析.pdfVIP

学兔兔 第 18卷第6期 建 筑 材 料 学 报 Vo1．18．No．6 2015年 12月 JOURNAI OF BUILDING MATERIAI S Dec．，2015 文章编号：1007—9629(2015)06-1095—04 热拌及温拌再生SMA沥青 混合料疲劳性能分析 季 节， 索 智， 石越峰， 许 鹰， 徐世法， 奚 进 (北京建筑大学 土木与交通工程学院，北京 100044) 摘要：设计了RAP质量分数分别为0 ，2O ，30 的6种热拌及温拌再生SMA沥青混合料，并 对其进行四点梁弯曲疲劳试验，采用耗散能法分析了RAP掺量、拌和方式对热拌及温拌再生SMA 沥青混合料疲劳性能的影响．结果表明：热拌及温拌再生SMA沥青混合料的疲劳寿命与累积耗散 能的关系不会随RAP掺量、拌和方式的变化而变化，疲劳寿命与累积耗散能在双对数坐标下，均 表现出良好的线性关系．同时，还发现了热拌及温拌再生SMA沥青混合料的累积耗散能与RAP 掺量、拌和方式之间的变化规律． 关键词：热拌及温拌再生SMA沥青混合料；RAP；拌和方式；耗散能法；疲劳性能 中图分类号：U414 文献标志码：A doi：10．3969／j．issn．1007～9629．2Ol5．06．032 Analysis on Fatigue Behaviors of Hot and Warm Recycled SMA Asphalt Mixture j I Jie， SUO Zhi， SHI Yuefeng， xU Ying， xU Shifa， XI Jin (School of Civil Engineering and Transportation，Beijing University of Civil Engineering and Architecture，Beijing 100044，China) Abstract：The hot and warm recycled SMA asphalt mixtures with 0 ，20 and 30 RAP were designed． Four—point bending fatigue test was conducted on the recycled SMA mixtures，and the energy dissipation method was employed to analyze the fatigue characteristics of the recycled SMA asphalt mixtures．It shows that the relationship between the fatigue life and cumulative dissipated energy of recycled asphalt mixtures does not change with the variation of RAP content and mixing mode．In a double logarithmic coordinate， there is a good linear relationship between the fatigue life and cumulative dissipated energy of recycled as— phalt mixtures．At the same time，the regulation that the cumulative dissipated energy of recycled asphalt mixture varies with RAP content and mixing