不同养护条件下粉煤灰掺量对UHPC性能的影响  

Influence of Different Curing Conditions and fly Ash Content on UHPC Performance

作　　者：刘一颖 陈建强[2] 栗曰峰 纪洪广[3] LIU Yiying;CHEN Jianqiang;LI Yuefeng;JI Hongguang(Logistics Division of Navy,Beijing 100071,China;School of Civil Engineering,Qingdao University of Technology,Qingdao 266033,China;School of Civil and Resource Engineering,University of Science and Technology Beijing,Beijing 100083,China)

机构地区：[1]海军后勤部,北京100071 [2]青岛理工大学土木工程学院,山东青岛266033 [3]北京科技大学土木与资源工程学院,北京100083

出　　处：《建井技术》2021年第6期38-42,共5页Mine Construction Technology

摘　　要：为探究不同养护方式及粉煤灰掺量对超高性能混凝土(UHPC)性能的影响,系统研究了5种粉煤灰掺量的UHPC在蒸压养护和水中养护条件下的工作性能、力学性能和渗透性能。试验结果表明,水中养护和蒸压养护条件下,UHPC的抗压强度均随着粉煤灰掺量的增加而显著提高;UHPC的抗压性能受蒸压养护时间和温度的影响很大,超过一定限值,会导致其抗压性能降低。此外,随着粉煤灰掺量从0%增加到40%,UHPC的渗透性能逐渐降低,混凝土拌合物的工作性逐渐提高。In order to explore the influence of different curing methods and fly ash content on the performance of ultra-high performance concrete(UHPC),the workability,mechanical properties and permeability of UHPC with five fly ash content under autoclave curing and water curing were systematically studied.The test results show that the compressive strength of UHPC increases significantly with the increase of fly ash content under both water curing and autoclave curing conditions.The compressive performance of UHPC is greatly affected by the autoclaved curing time and temperature,and when it exceeds a certain limit,its compressive performance will be reduced.In addition,with the increase of fly ash content from 0%to 40%,the permeability of UHPC decreases gradually,and the workability of concrete mixture improves gradually.

关 键 词：超高性能混凝土 粉煤灰掺量 工作性 抗压强度 渗透性 

分 类 号：TD352.3[矿业工程—矿井建设]