沥青混合料渗透性关键影响因素分析  

Analysis of Key Influencing Factors on Permeability of Asphalt Mixture

作　　者：向浩[1] 何兆益[1] 陈柳晓 陈龙[1] XIANG Hao;HE Zhao-yi;CHEN Liu-xiao;CHEN Long(School of Civil Engineering,Chongqing Jiaotong University,Chongqing 400074,China)

机构地区：[1]重庆交通大学土木工程学院,重庆市400074

出　　处：《公路》2019年第3期28-32,共5页Highway

基　　金：国家自然科学基金资助项目;项目编号51278513;重庆交通大学研究生科研创新项目;项目编号20160107

摘　　要：为了研究不同沥青混合料渗透性能影响因素的显著水平,使用自主研制的变水头渗透仪,考虑包括空隙率在内的6种因素进行沥青混合料渗透试验。通过渗透系数表征渗透性能,利用灰关联方法对试验结果进行分析,结果表明:空隙率对渗透性的影响最显著;其次是2.36mm通过率、级配最大粒径、油石比,3者影响都能改变空隙率进而影响渗流路径大小;针入度对渗透性影响不显著;在工程实践中,应着重考虑通过空隙率改变沥青混合料的渗透性能。In order to study the influencing factors on the permeability of different asphalt mixtures,6 kinds of factors including the porosity are used to carry out the asphalt mixture penetration test,and the permeability is characterized by the permeability coefficient.The results show that the effect of porosity on the permeability is the most significant,and followed by the ratio of 2.36 mm pass rate,gradation maximum particle size,and oil-stone ratio,which all affects the porosity and thus influence the size of the seepage path;and the penetration degree doesn’t have a significant impact on the permeability,therefore,in engineering practice,attention should be focused on changing the asphalt mixture permeability through changing the porosity.

关 键 词：沥青混合料 渗透性能 灰关联分析 空隙率 渗透试验 

分 类 号：TU535[建筑科学—建筑技术科学]