反应型冷拌沥青混合料制备及性能研究  

Research on reactive liquid asphalt mixture

作　　者：刘建芳 李九苏[1] 杨帆 石扬 王争愿 LIU Jian-fang;LI Jiu-su;YANG Fan;SHI Yang;WANG Zheng-yuan(School of Traffic and Transportation Engineering,Changsha University of Science & Technology,Changsha 410114,China;Yichang Urban Construction Investment Holding Group Co.,Ltd.,Yichang 443000,China)

机构地区：[1]长沙理工大学交通运输工程学院,湖南长沙410114 [2]宜昌城市建设投资控股集团有限公司,湖北宜昌443000

出　　处：《交通科学与工程》2019年第2期16-21,共6页Journal of Transport Science and Engineering

基　　金：湖南省交通科技项目(201605);长沙市科技特派员项目(CSKJ2017)

摘　　要：为克服传统冷拌沥青混合料中溶剂沥青或乳化沥青存在的初始强度低、强度增长慢、开放交通迟、温度敏感性大及抗水损害能力差等缺陷,以不饱和脂肪酸等作为沥青液化剂,以无机活性粉末作为固化剂,研制反应型冷拌沥青。通过马歇尔试验,确定反应型冷拌沥青最适宜的级配为LB-10,初始稳定度(2 h)>5 kN,成型稳定度(12 h)>10 kN。通过冻融劈裂试验、浸水马歇尔试验、车辙试验及小梁弯曲试验,评价其路用性能。研究结果表明:反应型冷拌沥青混合料的各项性能均能达到热拌沥青混合料的性能要求。Low initial strength, slow strength increase, slow curing, high temperature susceptibility,poor water damage resistance, and poor storage stability are the major shortcomings of traditional cold mix asphalt(solvent asphalt or emulsified asphalt). Reactive cold mixed asphalt(using unsaturated fatty acids as asphalt liquefaction agents and inorganic active powders as curing agents) was produced to overcome the weaknesses. The optimum gradation of reactive cold mixed asphalt was determined by Marshall test to be LB-10, initial stability(2 h)>5 kN, molding stability(12 h)>10 kN. Through freeze-thaw split test, water-immersed Marshall test, rutting test and the trabecular bending test, the road performance is evaluated. The result shows that the performance can meet the performance requirements of the hot mixed asphalt mixture.

关 键 词：反应型冷拌沥青混合料 级配设计 初始稳定度 高温性能 低温性能 水稳定性 

分 类 号：TU5[建筑科学—建筑技术科学]