钢渣基膨胀剂对半柔性路面抗裂性能影响  

Influence of steel slag based expansive agent on crack resistance of semi flexible pavement

作　　者：高颖[1] 汲治鹏 李金垣 郭庆林[1] 张博昊 刘佳怡 GAO Ying;JI Zhipeng;LI Jinyuan;GUO Qinglin;ZHANG Bohao;LIU Jiayi(School of Civil Engineering,Hebei University of Engineering,Handan,Hebei 056038,China;CSCEC Road and Bridge Group Co.,Ltd.,Shijiazhuang 050000,China;Leicester International Institute,Dalian University of Technology,Panjin,Liaoning 124221,China)

机构地区：[1]河北工程大学土木工程学院,河北邯郸056038 [2]中建路桥集团有限公司,石家庄050000 [3]大连理工大学莱斯特国际学院,辽宁盘锦124221

出　　处：《中国科技论文》2023年第6期601-607,共7页China Sciencepaper

基　　金：国家自然科学基金资助项目(51508150);国家重点研发计划项目(2018YFF0300201);河北省自然科学基金资助项目(E2018402206)。

摘　　要：针对半柔性路面(semi-flexible pavement,SFP)水泥基灌浆材料收缩开裂问题,采用钢渣粉、二水石膏和硫铝酸盐水泥(R.SAC)按1∶(0.8~1.3)∶(0.5~0.8)质量比混合得到一种钢渣基膨胀剂(steel slag-based expansion agent,SSBEA)。探究了钢渣基膨胀剂在SFP中的适用性,确定了钢渣粉最佳细度为0.8%,膨胀剂最佳掺量为15%~20%;在灌浆材料体系中分别掺入UEA膨胀剂和钢渣基膨胀剂,对灌浆材料工作性能进行了优化调控对比试验,并进行了SFP抗裂性能测试。结果表明,钢渣基膨胀剂在水泥基灌浆材料中的膨胀效果平稳持久,其水化后期的补偿收缩性能优于UEA膨胀剂,并且可以有效提升水泥基灌浆材料的施工适用性能;灌入掺钢渣基膨胀剂的灌浆材料的SFP低温抗裂性能更好,可以更好地起到抗裂作用。In view of the shrinkage cracking problem of cement based grouting materials for semi flexible pavement(SFP),a steel slag based expansion agent was prepared by mixing steel slag powder,dihydrate gypsum and sulphoaluminate cement with the ratio of 1∶(0.8-1.3)∶(0.5-0.8).The applicability of the steel slag based expansive agent in SFP was investigated.The optimum fineness of steel slag powder is found to be 0.8%,and the optimum content of expansive agent is 15%-20%.Moreover,UEA expansive agent and steel slag based expansive agent were added into the grouting material system respectively,and the working performance of the grouting material was optimized and adjusted.The cracking resistance of SFP was tested.The results show that the expansion effect of steel slag based expansion agent in cement-based grouting materials is stable and lasting,its compensation shrinkage performance in the later hydration period is better than the UEA expansive agent,and it can effectively improve the construction applicability of cement-based grouting materials.The SFP filled with grouting materials mixed with steel slag based expansion agent has better crack resistance at low temperature,which can play a better role in crack resistance.

关 键 词：半柔性路面 水泥基灌浆材料 钢渣基膨胀剂 工作性能 抗裂性能 

分 类 号：U414[交通运输工程—道路与铁道工程]