大型钢桥桥面铺装用高黏沥青混合料的研究  

Study on large steel bridge deck pavement with high viscosity asphalt mixture

作　　者：任瑞波[1] 耿立涛[1] 王玉恒 刘占斌[1] 

机构地区：[1]山东建筑大学交通工程学院,山东济南250101 [2]青岛市公路规划设计院有限公司,山东青岛266102

出　　处：《山东建筑大学学报》2016年第5期416-422,共7页Journal of Shandong Jianzhu University

基　　金：国家自然科学基金项目(51278288)

摘　　要：随着交通运输产业的发展,大型钢桥的数量增多,研究适用于大型钢桥桥面铺装的新型材料具有重要意义。文章基于马歇尔设计方法,围绕研发的新型高黏沥青材料,通过混合料的配合比设计与室内性能试验,分析了高黏沥青混合料SMA-5的最佳级配比例、性能表现及其机理。结果表明:设计确定的最佳沥青用量为6.7%,高黏沥青混合料在60和70℃动稳定度分别为12513和3759次/mm;低温弯曲试验与冻融劈裂试验的结果满足规范要求,与环氧沥青混合料的试验结果相当;在高应变水平下,高黏沥青混合料的疲劳性能优于环氧沥青混合料;沥青的高黏特性以及粗集料形成的嵌挤结构是该混合料具有优秀路用性能与力学性能的主要原因。Along with the development of transportation industry, the number of large steel bridge is constantly increasing. The research on the new materials for large steel bridge deck has great significance. This article, based on the Marshall design method and the new high viscosity asphalt, studie the optimum proportion, performance and function mechanism of the high viscosity asphalt through the mix design and laboratory test. The results show the optimum asphalt content of asphalt mixture gradation is 6.7%. The dynamic stability are 12513 t/ram and 3759 t/mm in 60~C and 70~C, respectively. The high viscosity asphalt matrix mixture has outstanding performance. The results of low-temperature bending test and freeze-thaw splitting test meet the needs of design and standard, and equally match with the epoxy asphalt mixture. At high strain levels, the fatigue property of high viscosity asphalt matrix mixture is better than that of epoxy asphalt mixture. The main reasons for the mixture with good pavement performance and mechanical properties are the high adhesion properties of asphalt and the embedded structure formation by the coarse aggregate.

关 键 词：道路工程 高黏沥青混合料 试验评价 性能试验 沥青玛蹄脂碎石混合料 

分 类 号：U414[交通运输工程—道路与铁道工程]