化工矿物与加工2024，Vol.53Issue(7)：47-52,6.DOI:10.16283/j.cnki.hgkwyjg.2024.07.007
早强型钢渣基胶凝材料的制备及其水化机理研究
Preparation and hydration mechanism of early strength steel slag-based cementitious materials
摘要
Abstract
Steel slag is the main waste produced in the process of steelmaking,which has the characteristics of single use,large production and environmental pollution.This article prepares early strength steel slag based cementing materials by mixing steel slag micro powder and 42.5 ordinary Portland cement with reinforcing agents Ⅰ and Ⅱ,respectively.By measuring the chemical composition and mineral composition of the raw materials,the mechanical properties of the cementing materials were tested,and their thermal stability and microstructure were analyzed to reveal the hydration mechanism of the cementing materials.The results showed that the early compressive strength of the gelled material is greatly improved,and the later compressive strength is good.This is because the reinforcer can promote the consumption of Ca(OH)2 and increase the hydration reaction rate,and the OH-hydrolyzed by Ca(OH)2 can promote the dissolution of silicate from the vitreous in the steel slag powder and form C-S-H gel with Ca2+.The sulfate contained in the reinforcer can form ettringite AFt with the cementing material and fill the gel pores to enhance the compactness of the material.The optimal ratio of early-strength steel slag based cementing material is 125 g steel slag powder and 10 g reinforcement agent Ⅱ.The research results provide the new idea for the preparation of early-strength steel slag based cementing materials,and can also provide reference for the comprehensive utilization research of steel slag.关键词
钢渣微粉/增强剂/早强/胶凝材料/水化机理Key words
steel slag micro powder/reinforcing agent/early strength/gelling material/hydration mechanism分类
建筑与水利引用本文复制引用
张浩,马伟克,叶雁飞,申振伟,司乐琦,胡道庆..早强型钢渣基胶凝材料的制备及其水化机理研究[J].化工矿物与加工,2024,53(7):47-52,6.基金项目
国家自然科学基金项目(51674002) （51674002）
中国宝武低碳冶金创新基金资助项目(BWLCF202202) （BWLCF202202）
安徽高校协同创新项目(GXXT-2020-072) （GXXT-2020-072）
中国博士后科学基金资助项目(2017M612051). （2017M612051）
