沥青混合料抗冲刷性能的试验研究  

Research on Erosion-resistance Performance of Asphalt Mixture

作　　者：朱唐亮[1] 谈至明[1] 

机构地区：[1]同济大学道路与交通工程教育部重点实验室,上海201804

出　　处：《公路交通科技》2015年第5期7-12,共6页Journal of Highway and Transportation Research and Development

基　　金：交通运输部西部交通建设科技项目(2008 318 000 99)

摘　　要：对普通AC、改性SMA和改性OGFC3类沥青混合料的抗冲刷性能开展了详细的试验研究，结果表明，冲刷应力比A是影响沥青混合料抗冲刷能力的最关键因素，它可消除同类沥青混合料中由于不同沥青含量、温度和冲刷水压力所引起的差异。建立了冲刷次数Ⅳ与冲刷深度d、冲刷应力比A的一般式。3种材料抗冲刷系数A的变化范围为0．9×105-1．7×105。冲刷深度指数b和冲刷应力比指数C取决于沥青性质，其中，基质沥青和改性沥青的冲刷深度指数b分别为2．15，2．26，冲刷应力比指数c为3．9，4．0。沥青类材料的c值与其疲劳指数较接近。冻融后材料的抗冲刷系数、冲刷应力比指数基本保持不变，抗冲刷性能的下降可归结于结构强度的下降。The erosion-resistance performance of 3 types of asphalt mixture including ordinary asphalt concrete （AC） , modified stone matrix asphalt （SMA） and modified open graded friction course （OGFC） are experimentally studied. The result shows that erosion stress ratio A is the most key influencing factor to the erosion-resistance performance of asphalt mixtures, it could eliminate the difference caused by different asphalt dosage, temperature and expression among erosion times established. The variation range hydrodynamic pressure in the same kind of asphalt mixture. The general N, erosion depth d and erosion stress ratio A for asphalt mixtures is of anti-erosion coefficient A of 3 kinds of asphalt mixture is 0. 9 × 105 - 1.7 ×105. The erosion depth index among them, the value of b of base b and erosion stress ratio index c are related to the nature of the asphalt, asphalt and modified asphalt is 2. 15 and 2. 26 respectively, the value of c of base asphalt and modified asphalt is 3.9 and 4. 0 respectively. The value of c of asphalt mixtures is relatively close to the fatigue index. Freeze-thaw has little effect on the materials＇ anti-erosion indexes and erosion stress ratio indexes, the drop of the road materials＇ anti-erosion performance could be mainly attributed to the decrease of the material strength.

关 键 词：道路工程 沥青混合料 试验研究 抗冲刷性能 冲刷应力比指数 

分 类 号：U416.217[交通运输工程—道路与铁道工程]