颗粒污染物对AC-13沥青路面抗滑性能影响

Effect of particle pollutants on skid resistance of AC-13 asphalt pavement

为探讨城市道路污染物对路面抗滑性能的影响,模拟真实的道路情况,采用城市道路吸尘车从实际城市道路中收集污染物;利用振动摇筛机和激光粒度仪分析污染物的种类和粒径分布;在干、湿两种情况下,利用连续摩擦因数测定仪(T2GO系统)测定含有不同污染物的AC-13型沥青路面的摩擦因数.研究结果表明,砂尘类污染物是城市道路的主要污染物类型;在干燥条件下,随着砂尘类污染物的增加,路面摩擦因数逐渐降低;并且,在潮湿情况下,污染物对沥青路面抗滑性能的影响会随着污染物类型变化而发生改变;与干燥条件相比,污染物在潮湿状态下对路面抗滑性能的影响更大.

To examine the impact of pollutants on urban roads to the skid resistance of pavements,and simulate the actual road conditions,the pollutants are collected from actual city road by vacuum truck.The types and particle size distributions of pollutants are analyzed by using a shaker and laser particle size analyzer.The friction coefficient of AC-13 roads containing different pollutants is measured using a continuous friction coefficient tester(T2GO system)under dry and wet conditions.The research results indicate that sand and dust pollutants are the main types of contaminants on urban roads;under dry condition,as the concentration of sand and dust pollutants increases,the road surface friction coefficient gradually decreases;however,under wet condition,the pollutant types have greater influence on the skid resistance of asphalt pavement and compared with the dry condition,under wet condition pollutants have greater effect on skid resistance.