内养护集料、减缩剂与膨胀剂协同提升UHPC材料体积稳定性  

Effect of calcined hydrotalcite microstructure of cement-slag composite paste eroded by brine

作　　者：杨腾宇 舒本安 邱文俊 任彦飞 郑礼尚 李进辉[2] 丁庆军[2] YANG Tengyu;SHU Ben′an;QIUWenjun;REN Yanfei;ZHENG Lishang;LI Jinhui;DING Qingjun(Foshan Traffic Technology Co.,Ltd.,Foshan 528315,China;School of Materials Science and Engineering,Wuhan University of Technology,Wuhan 430070,China)

机构地区：[1]佛山市交通科技有限公司,广东佛山528315 [2]武汉理工大学材料科学与工程学院,湖北武汉430070

出　　处：《混凝土》2023年第12期120-125,共6页Concrete

基　　金：交通运输行业重点科技项目(2020-MS1-003)。

摘　　要：研究了内养护集料、外掺减缩剂、减缩剂与内养护集料复合及减缩剂、内养护集料以及膨胀剂协同对超高性能混凝土(UHPC)工作性能、力学性能,尤其是体积稳性能的影响。结果表明:高钛重矿渣砂、外掺6%膨胀剂和外掺0.5%减缩剂能够显著提升UHPC体积稳定性,可以满足佛山市富龙西江特大桥的技术要求。此外,探明了4种方案对UHPC体积稳定性能的影响规律,并提出了UHPC体积稳定性能提升机理。The effects of external shrinkage reducing agent,combination of shrinkage reducing agent and internal curing aggregate and the synergistic effect of inner curing aggregate,shrinkage reducing agent,internal curing aggregate and expansion agent on the working performance,mechanical properties,especially volume stability of ultra-high performance concrete(UHPC)are studied.The addition of high-titanium heavy slag sand,6%expansion agent and 0.5%shrinkage reducer can significantly improve the volume stability of UHPC,which can meet the technical requirements of the Fulong Xijiang Bridge in Foshan City.In addition,the influence of four schemes on the volume stability of UHPC is verified and the mechanism of improving the volume stability of UHPC is proposed.

关 键 词：减缩剂 高钛重矿渣砂 UHPC 体积稳定性 

分 类 号：TU528.042[建筑科学—建筑技术科学]