沥青混合料渗透性影响因素分析  

Analysis of influencing factors on permeability of asphalt mixture

作　　者：周志刚[1] 郭安顺 俞文生[1,2] 李岩[1] 

机构地区：[1]长沙理工大学道路结构与材料交通行业重点实验室,湖南长沙410004 [2]江西省高速公路投资股份有限公司,江西南昌330000

出　　处：《长沙理工大学学报（自然科学版）》2017年第1期1-9,共9页Journal of Changsha University of Science and Technology:Natural Science

基　　金：国家自然科学基金资助项目(51378084);交通运输部应用基础研究项目(2014319825060);江西交通科技计划项目(2011C0063);湖南省研究生科研创新项目(CX2014B371)

摘　　要：为了研究不同因素对沥青混合料渗透性能的影响,通过测试AC-13和AC-20两种沥青混合料不同空隙率试件在不同温度、水压和轴压条件下的渗透系数,对比研究水压、温度、空隙率、轴压、最大公称粒径等因素对沥青混合料渗透性能的影响。试验结果表明,渗水量随着水压的增大而增大,但增加幅度呈逐渐减小的趋势;空隙率对沥青混合料材料渗透性能影响最大,空隙率越大,其渗透系数越大,间接验证了8%的空隙率是沥青路面透水性急剧增长的拐点;对于不同沥青混合料材料,最大公称粒径越大,其渗透系数越大;对于相同的沥青混合料,试验温度越高,加载的轴压越大,其渗透系数越大。故应严格控制沥青路面施工压实质量,注意多雨地区高温重载对沥青路面的不利影响。In order to study the influence mixture, the influences of factors includi of ng different factors on the permeability of asphalt water pressure, temperature, void content, axi- al pressure and maximum nominal partical size on the permeability of asphalt mixture were comparatively researched by testing the permeability coefficient of two kinds of asphalt mixture specimens （AC--13 and AC--20） with different porosity at different conditions, such as temperature, water pressure and axial pressure. The experimental results show that the seepage volume increases with the increase of water pressure, but the increasing range de- creases gradually. The void ratio has the greatest influence on the permeability of asphalt mixture. The greater the void ratio, the larger the permeability coefficient, which indirectly proves that 8% of the porosity is the turning point of the rapid increase of the permeability of asphalt pavement. For different asphalt mixtures, the larger the maximum nominal particle size, the greater the coefficient of permeability.For the same asphalt mixture, the higher the test temperature, the greater the axial pressure, and the greater the coefficient of permeability. Therefore, we should strictly control the compaction quality of asphalt pavement construction, paying more attention to the adverse effects of high temperature and heavy load on Asphalt Pavement in rainy areas.

关 键 词：沥青混合料 渗透试验 渗透系数 空隙率 最大公称粒径 轴压 

分 类 号：U414[交通运输工程—道路与铁道工程]