水资源与水工程学报2024，Vol.35Issue(4)：144-152,9.DOI:10.11705/j.issn.1672-643X.2024.04.17
煅烧水滑石对钢筋混凝土的阻锈机理研究
Corrosion inhibition mechanism of calcined layered double hydroxides on reinforced concrete
摘要
Abstract
The corrosion inhibition effect of layered double hydroxides(LDHs)and calcined layered double hydroxides(CLDHs)on reinforced concrete under chloride-sulfate attack was studied by approaches of linear polarization resistance(LPR),electrochemical impedance spectroscopy(EIS),energy dispersive spectroscopy(EDS),and chloride ion content test.The results show that CLDHs and LDHs have small particle sizes and large specific surface areas,their micro-aggregate effect can improve the compressive strength of the concrete at 28 d by about 6％,optimize the pore structure of the concrete,and improve the chloride ion binding rate of the concrete system.Under coupled erosion of salt and drying-wetting cycles,CLDHs and LDHs can significantly increase the polarization resistance and capacitive arc of steel bars in re-inforced concrete,and the corrosion inhibition efficiency of CLDHs is larger than that of LDHs.With the in-crease of the number of cycles,the corrosion inhibition efficiency decreases,but the corrosion inhibition ef-ficiency of CLDHs is still above 85％after 90 drying-wetting cycles,and the corrosion inhibition mecha-nism is mainly originated from the adsorption effect of CLDHs on free chloride ions.Therefore,the addition of CLDHs can effectively improve the corrosion resistance of reinforced concrete.关键词
钢筋混凝土/阻锈机理/氯离子/电化学/煅烧水滑石Key words
reinforced concrete/corrosion inhibition mechanism/chloride ion/electrochemistry/layered double hydroxides(LDHs)/calcined layered double hydroxides(CLDHs)分类
建筑与水利引用本文复制引用
冀慧星,杭美艳,杨宇斌..煅烧水滑石对钢筋混凝土的阻锈机理研究[J].水资源与水工程学报,2024,35(4):144-152,9.基金项目
国家自然科学基金项目(52168033、52268044) （52168033、52268044）
内蒙古科技大学建筑科学研究所开放基金项目(JYSJJ-2021M07) （JYSJJ-2021M07）
内蒙古自治区直属高校基本科研业务费项目(2024QNJS089) （2024QNJS089）
内蒙古自治区高校青年科技英才项目(NJYT22068) （NJYT22068）
