沥青稳定碎石基层厚度对其动态力学性能的影响研究  

Study on the Thickness of Asphalt-treated Permeable Base Influencing Its Dynamic Mechanics Performance

作　　者：杨大田[1] 杨锡武[1] 

机构地区：[1]重庆交通大学土木建筑学院,重庆400074

出　　处：《武汉理工大学学报（交通科学与工程版）》2012年第5期1001-1004,共4页Journal of Wuhan University of Technology（Transportation Science & Engineering）

基　　金：教育部博士点基金资助课题(批准号:20095522110001);国家自然科学基金项目(批准号:51078374)资助

摘　　要：选定2种常用沥青稳定碎石基层混合料,采用大马歇尔实验法确定其最佳沥青用量.依据最佳沥青用量,以2.0、2.5、3.0倍最大公称粒径高度成型试件,进行动态贯入蠕变试验和间接拉伸疲劳试验,分析不同试件高度对动态贯入蠕变模量和疲劳寿命的影响.试验结果表明,2种沥青稳定碎石基层混合料在80mm左右厚度能获得较高的动态贯入蠕变模量和疲劳寿命.因此,对于沥青稳定碎石单层摊铺厚度推荐在80mm左右,这将获得良好的路用性能.An optimum asphalt content of two kinds of Asphalt-treated permeable base（ATB） was de- termined by a large scall Marshall method. The specimens were molded according the optimum asphalt content and 2.0,2.5 and 3.0 times nominal maximum size of aggregate （NMSA） thickness. Thses specimens were done by the dynamic indentation creep method and the indirect tensile fatigue test, which analyzed that the specimen thickniss had influence on the dynamic indentation creep modulus and fatigue lives. The experimental results showed that two kinds of ATB could gain bigger creep modulus and fatigue lives when the specimen thickness was 80ram or so. Therefore, for ATB paving thickness was recommened to 80 mm or so, which received good highway performance.

关 键 词：沥青稳定碎石基层 尺寸效应 动态贯入蠕变试验 间接拉伸疲劳试验 

分 类 号：U416.214[交通运输工程—道路与铁道工程]