聚羧酸减水剂和钢纤维耦合作用对UHPC性能的影响  

Effect of polycarboxylate superplasticizer and steel fiber on the performance of UHPC

作　　者：管佳男 刘少静 贺梦佳 程博 李绍达 刘晓[2] 李时雨 GUAN Jianan;LIU Shaojing;HE Mengjia;CHENG Bo;LI Shaoda;LIU Xiao;LI Shiyu(College of Civil Engineering,Henan University of Engineering,Zhengzhou 451191,China;College of Materials Science and Engineering,Beijing University of Technology,Beijing 100124,China)

机构地区：[1]河南工程学院土木工程学院,河南郑州451191 [2]北京工业大学材料科学与工程学院,北京100124

出　　处：《混凝土》2024年第8期44-47,共4页Concrete

基　　金：国家自然科学基金青年基金(52302020);河南省高等学校重点科研项目(24A560004);河南省科技攻关项目(242102230138)

摘　　要：聚羧酸减水剂(PCE)和钢纤维是超高性能混凝土(UHPC)的重要组成部分,二者的耦合作用对UHPC的工作性能和力学性能有重要的影响。针对聚羧酸减水剂和钢纤维耦合作用下新拌UHPC坍落度及其保持性、硬化UHPC的抗压强度,深刻揭示聚羧酸减水剂和钢纤维耦合作用对UHPC性能影响规律。结果表明:聚羧酸减水剂含量为3%,钢纤维的掺入量为1.5%时,UHPC性能最优异,其中坍落度达到135 mm,坍落度保持率约66.7%,抗压强度达到144 MPa。Polycarboxylate superplasticizer(PCE)and steel fiber are important components of ultra-high performance concrete(UHPC),and their coupling effect has a significant impact on the working and mechanical performances of UHPC.Based on the slump and retention of freshly mixed UHPC and the compressive strength of hardened UHPC under the coupling effect of PCE and steel fiber,it deeply reveals the law of the coupling effect of PCE and steel fiber on the performance of UHPC.The results show that when the content of PCE is 3%and the content of steel fiber is 1.5%,the performance of UHPC is the best,the slump reaches 135 mm,the slump retention rate is about 66.7%,and the compressive strength reaches 144 MPa.

关 键 词：超高性能混凝土 聚羧酸减水剂 钢纤维 坍落度 力学性能 

分 类 号：TU528.31[建筑科学—建筑技术科学]