硅酸盐通报2024，Vol.43Issue(10)：3607-3614,8.
碱激发矿渣液相环境中钢筋钝化膜形成及破坏规律
Formation and Failure Law of Rebar Passivation Film in Liquid Phase Environment of Alkali-Activated Slag
摘要
Abstract
To explore formation and failure mechanism of rebar passivation film in the liquid-phase environment of alkali-activated slag(AAS)system,AAS cementitious material systems with different mixing designs were prepared.The time-dependent evolution of the pH value of AAS real pore solution was studied in various factors such as different types of activator,alkali equivalent,water-glass modulus,fly ash addition,and curing time.In addition,the generation time,composition,thickness,and critical chloride threshold of rebar passivation film in simulated pore solution were monitored and analyzed over time.The results show that the pH value of AAS real pore solution decreases with the increase of curing time,with pH values of all samples remaining above 12.8 at 28 d.The increase in pH value in the simulated pore solution reduces the formation time of rebar passivation film,increases its thickness,and enhances its resistance to chloride ion erosion.The characteristic of AAS real pore solution having a higher pH value can provide a more favorable liquid phase environment for the stable existence of rebar passivation film,thereby improving the long-term performance of reinforced concrete structures.关键词
碱激发矿渣/孔溶液/pH值/钢筋钝化膜/钢筋锈蚀/激发剂Key words
alkali-activated slag/pore solution/pH value/rebar passivation film/rebar corrosion/activator分类
建筑与水利引用本文复制引用
万小梅,王博世,孙忠涛,张东方..碱激发矿渣液相环境中钢筋钝化膜形成及破坏规律[J].硅酸盐通报,2024,43(10):3607-3614,8.基金项目
国家自然科学基金(51878365) （51878365）
山东省自然科学基金(ZR2023ME030) （ZR2023ME030）
