乳化沥青冷再生混合料设计方法试验研究  

Experimental Study of the Design Method for Cold Recycled Mixture Using Asphalt Emulsion

作　　者：吴超凡[1] 曾梦澜[1] 钟梦武[2] 肖杰[1] 

机构地区：[1]湖南大学土木工程学院,湖南长沙410082 [2]湖南省交通科学研究院,湖南长沙410015

出　　处：《湖南大学学报（自然科学版）》2008年第8期19-23,共5页Journal of Hunan University:Natural Sciences

基　　金：西部交通建设科技资助项目(200431800002)

摘　　要：通过室内试验，探讨乳化沥青冷再生沥青混合料设计方法，不同旧料质量分数的6种混合料试验结果显示，试件击实成型后60℃养生72h后的失水率可以达到95％以上；混合料外加水量可以根据密度最大的原则估计，约为混合料质量分数的5％～9％；最佳油石比可以使用干燥或浸水试件，采用25℃马歇尔试验或劈裂试验，根据稳定度最大或抗拉强度最大的原则确定；4种方法确定的最佳油石比差别微小，在3．8％～5．2％之间。The design method for cold recycled mixture using emulsified asphalt was discussed. Results of laboratory tests on six mixtures with various contents of RAP （Reclaimed Asphalt Pavement） indicated that a moisture loss of 95 % or more could be achieved by curing the specimen at 60 ℃ for 72 hours. The amount of added water could be estimated following the maximum density principle, which was 5% --9% for the mixtures. The optimum binder to aggregate ratio could be determined by means of either Marshall or indirect tensile test at 25 ℃ following the maximum stability or tensile strength principle, using a dry or a wet specimen. The differences among the optimum binder to aggregate ratios from the four methods were negligible, which was 3.8 % -- 5.2 % for the mixtures.

关 键 词：道路工程 沥青混合料 乳化沥青 冷再生 设计方法 

分 类 号：U416.26[交通运输工程—道路与铁道工程]