排水抗滑磨耗层配比优化及路用性能研究

为改善湿热多雨地区路面排水、抗滑性能,提高行车安全性,基于优选的两种适宜级配,制备不同类型排水抗滑磨耗层,确定最佳油石比及级配,全面研究排水抗滑磨耗层路用性能。结果表明:基于抗剥落性能、排水性能与结构强度,两种级配制备的排水抗滑磨耗层沥青混合料的油石比适宜范围为5%~5.5%,在考虑高温稳定性、水稳定性与抗滑性能情况下,两种级配沥青混合料的最佳油石比均为5.5%;当油石比为5.5%时,第一种级配排水抗滑磨耗层的60℃动稳定度为7175次/mm,浸水马歇尔稳定度为6.19 kN,浸水残留马歇尔稳定度比为94.88%,浸水飞散损失率为3.39%,相比于第二种级配,表现出更好的高温稳定性和水稳定性,同时具有良好的抗滑和排水性能,能够更好地服务于湿热多雨地区道路建设。

Study on the Optimization of the Ratio of the Anti-sliding Wear Layer of Drainage and its Road Performance

To improve the drainage and anti-skid performance of pavement in hot and humid rainy areas, and further improve the driving safety, based on the two optimal gradations, different types of drainage anti-skid wearing course are prepared, the best oil stone ratio and gradation are determined, and the road performance of drainage anti-skid wearing course is comprehensively studied. The results show that the asphalt-aggregate ratio of the two graded asphalt mixtures is 5% ~ 5.5% based on the anti-spalling performance, drainage performance and structural strength;considering the high-temperature stability, water stability and anti-slip performance, the optimal oil-stone ratio of the two stages of asphalt mixture is 5.5% percent;when the oil-stone ratio is 5.5%, the dynamic stability of the first graded drainage anti-sliding wearing course at 60 °C is 7175 times/mm, the immersion Marshall stability is 6.19 k N, the immersion residual Marshall stability ratio is 94.88%, and the immersion flying loss rate is 3.39%;compared with the second gradation, it shows better high-temperature stability and water stability, and has good anti-slide and drainage performance, and can better serve hot and humid rainy areas.