硅酸盐通报2025，Vol.44Issue(4)：1297-1305,9.DOI:10.16552/j.cnki.issn1001-1625.2024.1581
溶脱处理对矿渣基胶凝材料性能的提升机理
Enhancement Mechanism of Performance of Slag-Based Cementitious Materials By Infiltrated Process
摘要
Abstract
Granulated blast furnace slag with volcanic ash charateristics can be used to produce slag-based cementitious materials after grinding.Compared with traditional cement,the hydration activity of slag-based cementitious materials is low.In order to enhance the hydration activity of grind granulated blast furnace slag(GGBS)in slag-based cementitious materials,this paper innovatively proposed to use polymerized aluminum sulfate solution to infiltrate and treat GGBS,accelerated the depolymerization of GGBS glass network structure,and improved the performance of slag-based cementitious materials.The ion dissolution behavior,surface elemental composition and microstructure morphology of GGBS-infiltrate were compared to GGBS-mix.The mechanism of infiltrated process to enhance the performance of slag-based cementitious materials was also analyzed by compressive strength,exothermic hydration,phase changes,and microscopic morphology tests.The results show that the amount of silicon ions dissolved in infiltrated filtrate is significantly higher than the amount of silicon ions dissolved in the mixed filtrate,the molar ratio of n(Ca)∶((n(Si)+n(Al))on the surface of the GGBS-infiltrate is reduced to 0.266,and the structure of GGBS-infiltrate is corroded.The setting time of the slag-based cementitious material prepared using infiltrated GGBS is reduced to 147 min,and the compressive strength of samples reaches to 3.75 MPa at 1 d.The GGBS-infiltrated process can promote the generation of ettringite and C-A-S-H gel,accelerate the hydration process of slag-based cementitious materials,and improve the performance of slag-based cementitious materials.关键词
聚合硫酸铝/溶脱/磨细高炉矿渣/矿渣基胶凝材料/物相分析Key words
polymerized aluminum sulfate/infiltrate/ground granulated blast furnace slag/slag-based cementitious material/phase analysis分类
建筑与水利引用本文复制引用
谢辰,陈伟,王辉,王栋民,刘一辉,李博..溶脱处理对矿渣基胶凝材料性能的提升机理[J].硅酸盐通报,2025,44(4):1297-1305,9.基金项目
青年科学基金(52102031) （52102031）
