级配对沥青混合料集料离析的影响  

Influence of gradations on aggregate segregations of asphalt mixtures

作　　者：彭余华[1] 沙爱民[1] 梁汉成[2] 雷宇[3] 

机构地区：[1]长安大学特殊地区公路工程教育部重点实验室,陕西西安710064 [2]大港油田集团路桥工程有限责任公司,天津300280 [3]中交第一公路勘察设计研究院,陕西西安710075

出　　处：《交通运输工程学报》2008年第5期44-48,共5页Journal of Traffic and Transportation Engineering

基　　金：国家西部交通建设科技项目(200331822334)

摘　　要：为了比较不同级配类型的沥青混和料在施工过程中产生集料离析的差异程度,通过调整拌和楼热料仓比例生产出具有代表性的7种级配类型沥青混和料,分析了其摊铺后在横断面上不同位置的颗粒组成状况,混和料经碾压成型后,测定其在横断面上不同位置的构造深度,并评价其数值特征。研究结果表明:在相同条件下,产生集料离析程度由大到小的沥青混和料级配为:反S型、间断级配、最大密度曲线之上微弓型、S型、0.45次方最大密度曲线、含中间粒径较多的级配、最大密度曲线之下微弓型。In order to compare the different degrees of the aggregate segregations for asphalt mixtures with different gradation types during construction, seven kinds of asphalt mixtures with typical gradation types were produced by adjusting the scale of hot bunker at mixer plant, and the granulometric composition conditions at different positions on cross section after spreading were analyzed. After the mixtures were rolled and molded, their construct depthes were measured at different positions on cross section, and their numerical characteristics were evaluated. Analysis result shows that, on the same condition, the gradations that influence the degrees of the aggregate segregations from large to small were in the following order： counter S type, discontinuous type, the micro bow type that is over the ultimate density curve, S type, 0.45 capital ultimate density curve, the gradation with superior middle particle size, the micro bow type that is below the ultimate density curve. 5 tabs, 2 figs, 10 refs.

关 键 词：路面工程 沥青混合料 集料离析 级配调整 

分 类 号：U414[交通运输工程—道路与铁道工程]