热拌沥青混合料拌和和易性的评价方法  

Mixing Workabilty Evaluation Method of Hot Mix Asphalt Mixture

作　　者：董夫强 祖元哲 朱启洋 柳林 王海军 DONG Fuqiang;ZU Yuanzhe;ZHU Qiyang;LIU Lin;WANG Haijun(School of Civil and Transportation Engineering,Hohai University,Nanjing 210098,China;Jiangsu Xiandai Road&Bridge Co.,Ltd.,Jiangsu Communications Holding Co.,Ltd.,Nanjing 210002,China)

机构地区：[1]河海大学土木与交通学院,江苏南京210098 [2]江苏交通控股有限公司江苏现代路桥有限责任公司,江苏南京210002

出　　处：《建筑材料学报》2024年第3期275-282,共8页Journal of Building Materials

基　　金：国家自然科学基金资助项目(52278451);江苏现代路桥有限公司科技项目(2021JKY18)。

摘　　要：基于沥青混合料的材料组成及分布,采用扫描电镜(SEM)测定热拌沥青混合料中集料表面裹附的沥青膜厚度,并提出一种拌和和易性评价指标.采用集料分布均匀性和压实度测试结果进一步验证和分析不同热拌沥青混合料拌和和易性的变化规律.结果表明:沥青种类、级配类型及拌和温度对热拌沥青混合料拌和和易性影响作用不同;沥青膜在集料表面裹附得越均匀,热拌沥青混合料的拌和和易性就越好,集料分布的离散性越小,热拌沥青混合料成型的压实度越大.Based on the material composition and distribution of asphalt mixtures,scanning electron microscopy(SEM)was used to determine the thickness of the asphalt film wrapped around the aggregate surface in hot mix asphalt mixtures,and to propose a mixing workability evaluation index.Then the changes of mixing workability in different hot mix asphalt mixtures were further verified and analyzed through the index of aggregate distribution and compaction.The results show that the type of asphalt,gradation type,and mixing temperature have different effects on the mixing workability of hot mix asphalt mixtures.The better the uniformity of asphalt film attachment to the aggregate surface,the better the mixing workability of hot mix asphalt mixtures,the less discrete the aggregate distribution,the greater the compaction of the hot mix asphalt mixtures molding.

关 键 词：道路工程 热拌沥青混合料 拌和和易性 沥青膜厚度 压实度 

分 类 号：U414[交通运输工程—道路与铁道工程]