基于改进测试方法的透水沥青混合料空隙阻塞试验研究

摘要

为研究透水沥青混凝土路面服役过程的空隙阻塞行为,针对透水沥青混合料车辙试件的优点和特性,自制常水头竖向渗透系数测定装置测定透水沥青混合料在径流雨水作用下的渗透系数,绘制归一化时程曲线分析其空隙阻塞效应.结果表明,透水沥青混合料的空隙阻塞过程由“快速阻塞”、“阻塞部分恢复”和“渐进阻塞”三阶段组成,空隙衰减曲线对透水沥青路面空隙阻塞程度的预估、路面清洗时间节点的确定具有一定的指导意义.%In order to research the voidclogging process of porous asphalt pavement,in view of the characteristics and advantages of the porous asphalt mixture rut specimens,constant head vertical permeability coefficient measurement device is made to measure the permeability coefficient of PAC under the action of road runoff.The normalized time-historycurve is draw to analyze the voidclogging effect.The results show that the voidclogging process of porous asphalt mixture consists of three stages,which is " rapid clogging"," clogging part recovery" and " slowlyclogging".It has a definite guiding significance to estimate voidclogging degree and ensure the road cleaning time node for PACin the point in time tothe valley value of void damping curve.