王勇++袁腾++杨建波++陈华鑫++况栋梁



摘 要:通过室内试验成型了AC- 13沥青混合料车辙板试件,借助室内加速磨耗试验模拟了沥青路面在行车荷载作用下的磨损行为。测试车辙板试件加速磨耗前后抗滑值和构造深度的变化,分析了环境温度和加载次数对沥青路面抗滑性能的影响。借助扫描电镜对回收集料的表面微观形貌进行了观测。结果表明:温度对沥青路面抗滑性能的衰减具有显著的影响;抗滑值和构造深度的变化与加速磨耗次数具有良好的相关关系。
关键词:沥青路面;抗滑性能;粗集料;电镜扫描
中图分类号:U416.03 文献标志码:B
Research on Skid Resistance Attenuation of Asphalt Pavement by Accelerated Wear
WANG Yong1, YUAN Teng2,YANG Jian- bo3, CHEN Hua- xin2, KUANG Dong- liang2
(1. College of Water and Architectural Engineering, Shihezi University, Shihezi 832003, Xinjiang, China;
2. School of Materials Science and Engineering, Changan University, Xian 710064, Shaanxi, China;
3. Chang Jiang Road and Bridge Co. Ltd., Wuhan 430000, Hubei, China )
Abstract: Rutting plate specimens for AC- 13 asphalt mixture were formed through laboratory tests. With indoor accelerated wear test, wear behavior of asphalt pavement under traffic loads was simulated. The changes of rutting plate specimens skid resistance value and texture depth before and after the accelerated wear were tested, and the impact of ambient temperature and load times on the skid resistance performance of asphalt pavement was analyzed. Surface microtopography of the collected aggregate was observed with scanning electron microscope. The results show that the temperature has a significant influence on the decay of the skid resistance performance, and theres a correlation between the accelerated wear times and the changes in skid resistance value and texture depth.
Key words: asphalt pavement; skid resistance performance; coarse aggregate; scanning electron microscope
0 引 言
随着人们行车安全意识的增强,道路行车安全受到越来越多的重视,提高沥青路面的抗滑性能是当前交通安全研究领域的热点问题。
近年,国内外学者围绕沥青路面的抗滑性能开展了大量的研究,结果显示沥青路面的抗滑作用主要可归因于路面的宏观构造深度和集料的微观纹理[1- 2],沥青路面的抗滑性能可以采用抗滑值和构造深度进行评价[3]。
在沥青路面使用过程中,经过行车荷载的反复碾压后,其宏观构造深度会不断减小,混凝土中粗集料的表面性质也会发生变化[4]。然而对于沥青路面在行车荷载循环作用下的宏观构造深度和微观纹理的变化的研究尚未得到足够重视,此外关于相关环境因素对沥青路面抗滑性能衰变特性的影响也未见研究。
本项目通过室内试验成型了AC- 13沥青混合料车辙板试件,借助室内加速磨耗试验模拟了沥青路面在行车荷载作用下的磨损行为,通过测试车辙板试件加速磨耗前后抗滑值和构造深度的变化,评价了环境温度和加载次数对沥青路面抗滑性能的影响。……