钢渣掺量对橡胶沥青混合料ARAC-13性能的影响  

Effect of Steel Slag Content on Performance of Rubber Mixture ARAC-13

作　　者：柳力[1,2] 朱晓明 刘朝晖[1,2] 李文博 杨程程 黄优[1,2] 刘磊鑫 LIU Li;ZHU Xiaoming;LIU Zhaohui;LI Wenbo;YANG Chengcheng;HUANG You;LIU Leixin(School of Traffic&Transportation Engineering,Changsha University of Science&Technology,Changsha 410114,China;National Engineering Research Center 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研究中心,长沙410114

出　　处：《材料导报》2023年第10期62-68,共7页Materials Reports

基　　金：国家重点研发项目(2021YFB2601000);湖南省自然科学基金(2020JJ5578,2022JJ40479);湖南省教育厅自然科学基金优秀青年项目(20B033,21B0296)。

摘　　要：为提高钢铁废渣的综合利用率和经济效益、优化环境,采用体积替代法进行钢渣沥青混合料组成设计,通过设计膨胀破坏试验新方法分析钢渣沥青混合料的体积稳定性,基于车辙试验、冻融劈裂试验和低温小梁弯曲试验等,开展不同钢渣掺量下的ARAC-13沥青混合料路用性能研究,并依托广西滨海公路项目对钢渣沥青混合料路面进行经济效益评估。结果表明,ARAC-13沥青混合料的毛体积相对密度和最佳油石比均与钢渣掺量呈正相关性,钢渣掺量的增加会降低混合料的体积稳定性,增大体积膨胀风险。当钢渣100%等体积替代粗集料时,ARAC-13沥青混合料的动稳定度、残留稳定度、冻融劈裂强度比、最大弯拉应变(-10℃)、摆值和构造深度均有不同程度的提高,可显著提升ARAC-13沥青混合料的路用性能,且可节约7.0%左右的材料成本,具有较大的应用前景和经济价值。To improve the comprehensive utilization rate and economic benefit of steel slag and optimize the environment,the volume substitution method was used to design the composition of steel slag asphalt mixture.The volume stability of steel slag asphalt mixture was analyzed by designing a new method of expansion failure test.Through the rutting test,freeze-thaw splitting test,and low-temperature beam bending test,the road performance of ARAC-13 asphalt mixture with different steel slag contents was studied,and the economic benefits of steel slag asphalt mixture pavement were evaluated based on the Coastal Highway Project in Guangxi.The results showed that the volume relative density of the ARAC-13 asphalt mixture and the optimum asphalt content are both positively correlated with the steel slag content.The increase in steel slag content will reduce the volume stability of the mixture and increase the risk of volume expansion.When the steel slag replaces the coarse aggregate with 100%volume,the dynamic stability,residual stability,freeze-thaw splitting strength ratio,maximum flexural strain(-10℃),pendulum value,and structural depth of the ARAC-13 asphalt mixture are improved,to some varying degrees.A large amount of steel slag(100vol%)can not only significantly improve the road performance of ARAC-13 asphalt mixture,but also save about 7.0%of the material cost,which has great application prospects and economic value.

关 键 词：钢渣 ARAC-13 路用性能 体积稳定性 经济效益 

分 类 号：U414[交通运输工程—道路与铁道工程]