空隙率对沥青混合料水稳定性与渗水性能的影响  

Effect of Void Ratio on Water Stability and Permeability of Asphalt mixture

作　　者：李万军 郭嘉 李杨 LI Wan-jun;GUO Jia;LI Yang

机构地区：[1]陕西交通建设养护工程有限公司,陕西西安710017 [2]长安大学公路学院,陕西西安710064

出　　处：《内蒙古公路与运输》2023年第6期1-4,共4页Highways & Transportation in Inner Mongolia

基　　金：陕西交通控股集团有限公司科技项目(18-12)。

摘　　要：水损坏是沥青路面主要病害之一,而空隙过大、存在渗水通道是引发水损害的主要原因之一。为了研究不同空隙率对沥青混合料水稳定性和渗水性能的影响,制备了不同空隙率的沥青混合料试件,并分别进行了饱水率试验、浸水马歇尔试验、冻融劈裂试验以及渗水性能试验。结果表明:沥青混合料试件的饱水率随空隙率增大而增加,且空隙率超过8%时,饱水率快速增加;残留稳定度和冻融劈裂强度比均随空隙率增大而减小;沥青混合料试件的渗水系数随着空隙率的增大而增加,且空隙率大于8%时,沥青混合料的渗水系数急剧增大。Water damage is one of main distresses of asphalt pavement.Excessive gaps and the presence of water seepage channels are one of the main causes of water damage.In order to study the effects of different void ratios on the water stability and permeability of asphalt mixtures,specimens with different void ratios were prepared in this paper.Water saturation test,immersion Marshall test,freeze-thaw split test and water permeability test were carried out respectively.The results show that the water saturation rate of asphalt mixture increases with the increase of the void ratio.When the void ratio exceeds 8%,the water saturation rate increases rapidly.The residual Marshall stability and freeze-thaw splitting strength ratio decrease with the increase of void ratio.The permeability coefficient of asphalt mixture increases with the increase of void ratio.When the void ratio is greater than 8%,the permeability coefficient of asphalt mixtures increases rapidly.

关 键 词：沥青路面 空隙率 水稳定性 渗水性能 

分 类 号：U416.217[交通运输工程—道路与铁道工程]