SAP预湿水量对UHPC性能的影响  

Pre-wetting water content of SAP on performance of UHPC

作　　者：李信 陈露一 LI Xin;CHEN Luyi(National Key Laboratory of Bridge Intelligent and Green Construction,Wuhan 430034,China;China Railway Bridge Research Technology Co.,Ltd.,Wuhan 430050,China)

机构地区：[1]桥梁智能与绿色建造全国重点实验室,湖北武汉430034 [2]中铁桥研科技有限公司,湖北武汉430050

出　　处：《混凝土与水泥制品》2024年第4期53-55,共3页China Concrete and Cement Products

基　　金：中国中铁股份有限公司科技研究开发计划项目(2019-重点-05)。

摘　　要：研究了高吸水性树脂(SAP)的预湿水量(0、20、30、40 kg/m3)对超高性能混凝土(UHPC)工作性、力学性能和收缩性能的影响。结果表明:随着SAP预湿水量的增加,UHPC的初始和3 h扩展度均增加,3 d和28 d抗压强度均降低,且3 d抗压强度降低更明显,自收缩值降低,干燥收缩值增大。The effect of pre-wetting water content(0,20,30,40 kg/m3)of super absorbent polymer(SAP)on the workability,mechanical properties,and shrinkage performance of ultra-high performance concrete(UHPC)was studied.The results show that with the increase of SAP pre-wetting water content,the initial and 3 h slump-flow of UHPC increase,the 3 d and 28 d compressive strength decrease,and the 3 d compressive strength decreases more significantly,and the self shrinkage value decreases and the drying shrinkage value increases.

关 键 词：高吸水性树脂 超高性能混凝土 工作性 力学性能 收缩性能 

分 类 号：TU528.01[建筑科学—建筑技术科学]