硅酸盐通报2026，Vol.45Issue(4)：1109-1121,13.DOI:10.16552/j.cnki.issn1001-1625.2025.0913
镍铁渣初始粒径对水泥砂浆碱骨料反应的影响
Influence of Initial Particle Size of Ferronickel Slag on Alkali-Silica Reaction in Cement Mortar
摘要
Abstract
Water-quenched cooling ferronickel slag fine aggregates contain a high proportion of amorphous silica and thus pose high alkali-silica reaction(ASR)activity,which may adversely affect the durability and safety of building structures.To elucidate the intrinsic relationship between the initial particle size of ferronickel slag and its ASR behavior,the aggregates were crushed and sieved to controlled size ranges,and the ASR activity of ferronickel slag fine aggregates with different initial particle sizes was systematically studied based on the evolution of hydration products,gel structure,and micro-morphology.The results indicate that the ASR reactivity of ferronickel slag fine aggregates increases with initial particle size.A large amount of calcium hydroxide generated in the ferronickel slag fine aggregate cement mortar participates in the subsequent ASR reaction.Calcium ions exchange with alkali metal ions in the gel product,and a large amount of calcium-rich gel is formed in the cracks near the aggregate.The water absorption rate of the calcium-rich gel is high,which will lead to the expansion of slurry and affect the pore structure of slurry.This study intuitively reveals the dynamic damage accumulation characteristics of aggregates with different initial particle sizes in ASR process,and provides basis and engineering reference for the ASR hazard evaluation and prevention strategy formulation of ferronickel slag fine aggregates.关键词
镍铁渣/凝胶/氢氧化钙/碱骨料反应/粒径/孔结构Key words
ferronickel slag/gel/calcium hydroxide/alkali-silica reaction/particle size/pore structure分类
化学化工引用本文复制引用
王伟,叶子,于淇,张亚梅..镍铁渣初始粒径对水泥砂浆碱骨料反应的影响[J].硅酸盐通报,2026,45(4):1109-1121,13.基金项目
国家自然科学基金重点项目(52130210) （52130210）
国家自然科学基金青年项目C类(52302017) （52302017）
