低掺量钢纤维对UHPC性能的影响  

Effect of Steel Fiber on UHPC Performance at Low Content

作　　者：杜永超 徐海宾[1] 雷余鹏 刘松鑫 DU Yongchao;XU Haibin;LEI Yupeng;LIU Songxin(School of Civil Engineering,Henan Polytechnic University,Jiaozuo 454000,China)

机构地区：[1]河南理工大学土木工程学院,河南焦作454000

出　　处：《洛阳理工学院学报（自然科学版）》2022年第3期21-24,共4页Journal of Luoyang Institute of Science and Technology：Natural Science Edition

基　　金：河南省高等学校重点科研项目(16A560021);河南理工大学博士基金项目(B2016-63).

摘　　要：为了研究低掺量钢纤维对超高性能混凝土(UHPC)性能的影响,测试了试件的流动度、抗压强度和抗折强度,对比分析了不同类型低掺量钢纤维对UHPC力学性能的影响。端钩型钢纤维和圆直型钢纤维均能提高UHPC的流动度,端钩型钢纤维效果更好,最大流动度达到245 mm,提高了4.7%。当掺量为1%时,抗压强度达到168.2 MPa,提升了31.4%;抗折强度达到35.2 MPa,提升了30.4%。In order to study the effect of steel fiber on UHPC performance at low content,liquidity,compressive strength and flexural strength of the specimens are tested,and the influence of different types of steel fibers on the mechanical properties of UHPC at low content is compared and analyzed.Both hook-shaped steel fiber and round-straight steel fiber can improve the fluidity of UHPC.Among them,the end hook-shaped steel fiber has a better effect,and the maximum can reach 245 mm,increasing by 4.7%.When the content is 1%,compressive strength is 168.2 MPa,increasing by 31.4%;the flexural strength is 35.2 MPa,increasing by 30.4%.

关 键 词：超高性能混凝土 钢纤维 流动度 抗压强度 抗折强度 

分 类 号：TU528[建筑科学—建筑技术科学]