硅酸盐通报2024，Vol.43Issue(10)：3595-3606,12.
杂散电流与复合离子作用下埋地碱激发矿渣混凝土中钢筋锈蚀研究
Corrosion of Steel Reinforcement in Buried Alkali-Activated Slag Concrete under Stray Current and Complex Ion Action
摘要
Abstract
The corrosion of steel reinforcement in underground engineering concrete,such as that found in coastal subways,is susceptible to occurring under the combined influences of stray current and corrosion ions.The corrosion behavior of steel reinforcement in different environments was studied.The real-time strain monitoring,electrochemical impedance spectroscopy(EIS),and microscopic analysis were employed for both ordinary Portland cement(OPC)concrete and alkali-activated slag(AAS)concrete.The results show that the steel reinforcement in concrete undergoes pitting corrosion.The chemical composition of corrosion products formed in the steel reinforcement appears to be unaffected by the type of concrete or the presence of corrosion ions.Furthermore,the corrosion rate observed in AAS concrete is found to be lower than that in OPC.Additionally,the time of deactivation of steel reinforcement and concrete rust expansion cracking is relatively logging behind.As the concentration of sulfate ions in saline soil increases,the rust cracking time and rust cracking force of steel reinforcement concrete increase first and then decrease.This suggests that sulfate ions have a mitigating effect on the corrosion rate of steel reinforcement induced by chloride salts.关键词
碱激发矿渣混凝土/杂散电流/复合离子/钢筋锈蚀/电化学阻抗/锈胀应力Key words
alkali-activated slag concrete/stray current/complex ion/corrosion of steel reinforcement/electrochemical impedance/rust expansion stress分类
建筑与水利引用本文复制引用
李祥翔,金祖权,逄博..杂散电流与复合离子作用下埋地碱激发矿渣混凝土中钢筋锈蚀研究[J].硅酸盐通报,2024,43(10):3595-3606,12.基金项目
国家自然科学基金面上项目(52078259) （52078259）
