偏高岭土对超高性能混凝土性能的影响研究  

Effect of Metakaolin on the Properties of Ultra High Performance Concrete

作　　者：莫宗云[1] 白力改[1] 王大光[1] 周慧文[1] Mo Zongyun;Bai Ligai;Wang Daguang;Zhou Huiwen(Construction Engineering Department,North China Institute of Aerospace Engineering,Langfang,Hebei 06500)

机构地区：[1]北华航天工业学院建筑工程系,河北廊坊065000

出　　处：《非金属矿》2018年第6期30-32,共3页Non-Metallic Mines

基　　金：河北省重点研发计划自筹经费项目(17273812);廊坊市科技支撑计划项目(2018011019);廊坊市科技支撑计划项目(2017011062);北华航天工业学院青年基金项目(KY-2017-14)

摘　　要：研究不同掺量偏高岭土(MK)对超高性能混凝土(UHPC)强度和微观性能的影响,包括抗压和抗折强度测试、化学结合水量及MK反应程度测试、DTA和XRD分析及压汞测试。结果表明:UHPC强度随MK掺量增加而提高,后期强度发展主要依赖于MK的活性反应;MK与水泥水化产物Ca(OH)2的活性反应会使UHPC的微观结构更加致密。The effect of diffrent replacement of metakaolin（MK） on the strength and micro-structures of ultra high performance concrete（UHPC） was studied, which includes the compressive and flexural strength measurement, chemical bounding water and MK reaction degree test, DTA and XRD analysis and mercury intrusion porosimetry. Results indicate the strength of UHPC enhances with increase of MK replacement. The strength development of UHPC at late age is primarily dependent on MK active reaction; MK react with Ca（OH）2 derived from cement hydration resulting in more dense micro-structures of UHPC.

关 键 词：偏高岭土 超高性能混凝土 抗压强度 孔结构 

分 类 号：TU52[建筑科学—建筑技术科学]