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常用矿物掺合料对超高性能混凝土性能的影响 被引量:14

Influence of Supplementary Cementitious Materials on Properties of Ultra-high Performance Concrete
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摘要 矿物掺合料的选择与应用,是超高性能混凝土(UHPC)研制工作中的重要环节。本文梳理了可用于UHPC的几种重要矿物掺合料,包括硅灰、粉煤灰、矿渣粉、稻壳灰、偏高岭土和玻璃微粉,探讨了它们的理化性质,并基于这些矿物掺合料对UHPC体系产生的微集料效应和填充效应,促进(或抑制)水泥水化反应的效应,以及它们本身的火山灰反应活性等,深入分析了掺加这些矿物掺合料对UHPC在新拌状态和硬化状态下几项重要性能的影响。还整理、分析了涉及矿物掺合料的UHPC相关专利,为UHPC中矿物掺合料的选择与优化提供重要参考。 Selection of supplementary cementitious materials(SCM)is one of the most important steps for preparing ultra-high-performance concrete(UHPC).This paper summarizes the properties of SCMs usually used in UHPC including silica fume,fly ash,slag powder,metakaolin,rice husk ash and glass powder.The influence of SCMs on properties of UHPC at fresh and hardened state is discussed.This work also analyzes patents related to SCMs used in UHPC aiming at providing information for studies on selection and optimization of SCMs in UHPC.
出处 《混凝土世界》 2022年第4期42-52,共11页 China Concrete
基金 重庆市科技局专项项目(cstc2020kqjscx-phxm1594) 上海市科委项目(19DZ1202702,19DZ1201404) 上海市建委专项课题(住建管2021-001-002) 住建部项目(项目号:K20200988)。
关键词 超高性能混凝土 矿物掺合料 理化性质 微集料效应 填充效应 火山灰效应 强度 自收缩 ultra-high performance concrete supplementary cementitious material physical and chemical properties micro-aggregate effect filler effect pozzolanic effect strength autogenous shrinkage
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