摘要
硅藻土是死亡的硅藻细胞壁矿物质经地质作用沉积形成的矿物。硅藻土(主要成分为SiO_(2))是一种来源广泛、性质稳定、价格低廉的天然无机非金属矿产资源,其应用前景十分广阔。由于独特的微孔结构和成分组成,近年来硅藻土开始逐渐被应用到水泥基胶凝材料中,以期达到改善水泥基材料性能的目的。目前,硅藻土在水泥基材料中的用途可根据添加形式分为三类:以矿物掺合料添加、以纳米材料形式添加和用作轻质骨料。采用的添加形式不同,硅藻土对水泥基材料性能的影响也各不相同。与此同时,硅藻土在其他胶凝材料(如沥青、地质聚合物等)中也显示出其应用潜力。本文根据近年来国内外在硅藻土领域的研究现状,总结了硅藻土材料在水泥基材料中的用途,探讨了用硅藻土替代混凝土中不同组分对胶凝材料性能的影响;归纳了硅藻土在其他胶凝材料制备中的作用,并对其在水泥胶凝材料中的应用进行了展望。
Diatomite is a mineral formed by the deposition of dead diatom cell wall minerals by geological processes,and the main composition of which is SiO_(2).Diatomite is a kind of natural inorganic mineral resource with wide source,stable properties and low price,so it has broad application prospect.Due to its unique microporous structure and composition,diatomite has been gradually applied to cement-based materials in order to achieve the purpose of improving the performance of cement-based materials in recent years.At present,the diatomite in cement-based materials can be divided into three kinds on the basis of the different uses,namely,as mineral admixtures,as nanomaterials and as lightweight aggregate.In the different uses,the impact of diatomite on cement-based materials is not the same.Furthermore,diatomite has shown its application potential in other cementitious materials like geopolymer and asphalt.In this paper,the application of diatomite in cement-based materials is summarized based on the research status of diatomite at home and abroad in recent years,and the effect of diatomite used as a substitute for different components in concrete on the properties of cementitious materials is discussed.This paper also summarizes the role of diatomite in the preparation of different cementitious materials,and finally prospects its application in cement cementitious materials.
作者
代楠
张育新
李凯霖
刘晓英
董必钦
封丽
贾兴文
DAI Nan;ZHANG Yuxin;LI Kailin;LIU Xiaoying;DONG Biqin;FENG Li;JIA Xingwen(College of Materials Science and Engineering,Chongqing University,Chongqing 400030,China;School of Environment and Resources,Chongqing Industrial and Commercial University,Chongqing 400067,China;School of Civil and Traffic Engineering,Shenzhen University,Shenzhen 518061,Guangdong,China;Chongqing Institute of Ecological Environment Science,Chongqing 401147,China)
出处
《材料导报》
EI
CAS
CSCD
北大核心
2022年第14期141-149,共9页
Materials Reports
基金
国家自然科学基金(U180120042)。
关键词
硅藻土
水泥胶凝材料
孔隙率
力学性能
diatomite
cement cementitious material
porosity
mechanical property
