钢渣替代集料的胶粉改性沥青混合料低温性能  

Low Temperature Performance of Crumb Rubber Modified Asphalt Mixture with Steel Slag as Substitute for Aggregate

作　　者：常春清[1,2] 郭佳 王岚 CHANG Chun-qing;GUO Jia;WANG Lan(School of Civil Engineering,Inner Mongolia University of Technology,Hohhot 010051,China;Key Laboratory of Civil Engineering Structure and Mechanics of Inner Mongolia Autonomous Region,Hohhot 010051,China)

机构地区：[1]内蒙古工业大学土木工程学院,呼和浩特市010051 [2]内蒙古自治区土木工程结构与力学重点实验室,呼和浩特市010051

出　　处：《公路》2023年第10期82-90,共9页Highway

基　　金：国家自然科学基金项目,项目编号11962024;内蒙古自治区关键技术攻关项目,项目编号2019GG031。

摘　　要：为研究钢渣全部替代玄武岩胶粉改性沥青混合料(CR-SAM)的低温性能,以钢渣部分替代玄武岩胶粉改性沥青混合料(CR-SBAM)和玄武岩胶粉改性沥青混合料(CR-BAM)作为对比,采用小梁弯曲破坏试验、小梁弯曲蠕变试验以及小梁直接拉伸应力松弛试验进行分析,同时使用广义Vogit-Kelvin模型和六单元广义Maxwell模型对CR-SAM进行分析。结果表明:钢渣全部替代集料的胶粉沥青混合料低温性能最好;随着温度的降低,3种沥青混合料的低温性能均变差;广义Vogit-Kelvin模型和六单元广义Maxwell模型能够较好地描述沥青混合料的蠕变和松弛性能。To study the low temperature performance of the basalt rubber powder modified asphalt mixture(CR-SAM)completely replaced by steel slag,the beam bending failure test,beam bending creep test and beam direct tensile stress relaxation test are carried out to compare the steel slag partially replacing basalt rubber powder modified asphalt mixture(CR-SBAM)and basalt rubber powder modified asphalt mixture(CR-BAM).At the same time,the generalized Vogit Kelvin model and six unit generalized Maxwell model are used to analyze CR-SAM.The results show that the low temperature performance of crumb rubber asphalt mixture is the best when steel slag completely replaces aggregate;with the decrease of temperature,the low temperature performance of the three asphalt mixtures becomes worse;the generalized Vogit Kelvin model and six unit generalized Maxwell model can better describe the creep and relaxation properties of asphalt mixture.

关 键 词：改性沥青混合料 小梁弯曲破坏试验 小梁弯曲蠕变试验 直接拉伸试验 Vogit-Kelvin模型 Maxwell模型 

分 类 号：U416.217[交通运输工程—道路与铁道工程] TU528.42[建筑科学—建筑技术科学]