基于涂层活化的橡胶粉改性沥青制备及性能试验研究  

Experimental Investigation on Preparation and Performance of Modified Asphalt by Crumb Rubber of Coating Activation

作　　者：李静 谢娟[1,2] 马云龙[1,2] LI Jing;XIE Juan;MA Yun-long(School of Traffic and Transportation Engineering,Changsha University of Science&Technology,Changsha 410114,China;State Engineering Laboratory of Highway Maintenance Technology,Changsha University of Science&Technology,Changsha 410114,China)

机构地区：[1]长沙理工大学交通运输工程学院,长沙410114 [2]长沙理工大学公路养护技术国家工程实验室,长沙410114

出　　处：《硅酸盐通报》2018年第10期3179-3186,3192,共9页Bulletin of the Chinese Ceramic Society

基　　金：国家自然科学基金青年基金(51608056);湖南省自然科学基金(2018JJ3537);公路养护技术国家工程实验室开放基金(16C0025)

摘　　要：基于相似相容原理,选取与橡胶粉及基质沥青相容性都好的聚酰胺,通过聚合物涂覆法对废胶粉进行活化,在橡胶粉表面形成一层均匀的聚酰胺涂层,提高了橡胶粉与基质沥青的相容性,以达到提高胶粉改性沥青的储存稳定性、改善橡胶粉改性沥青的路用性能的目的。借助正交试验,并结合极差分析和方差分析,以针入度、延度、软化点及布氏粘度为指标,确定橡胶粉掺量为20%,剪切温度为180℃,剪切时间为60 min;并在此基础上制备出高低温性能以及储存稳定性优良的活化橡胶粉改性沥青。Based on the principle of the dissolution in the similar material structure,polyamide possessing good compatibility with rubber powder and matrix asphalt was used as the activator to modify crumb rubber through polymer surface coating.The compatibility of crumb rubber and matrix asphalt was improved by the uniform polyamide coating formed on the rubber powder surface,and the storage stability and the road performance of modified asphalt were thus improved.The technological conditions were optimized by orthogonal test with the penetration,the ductility,the softening point and the viscosity as index.The is,the content of rubber powder was 20%,the cutting temperature was 180℃and the shear time was 60 min.On this basis,crumb rubber modified asphalt with good high temperature performance,low temperature performance and storage stability was prepared.

关 键 词：涂层活化 橡胶粉改性沥青 相容性 储存稳定性 

分 类 号：TU535[建筑科学—建筑技术科学]