钢筋混凝土电化学除氯发展现状  

Current status of electrochemical chloride extraction for reinforced concrete

作　　者：房子柱 李森林[2] 吴烨[2] 李宁 冯龙海 冯妍 孙克纬 余志诚 杨浩[1] FANG Zizhu;LI Senlin;WU Ye;LI Ning;FENG Longhai;FENG Yan;SUN Kewei;YU Zhicheng;YANG Hao(College of Materials Science and Engineering,Nanjing Tech University,Nanjing 211800,China;Materials&Structural Engineering Department,Nanjing Hydraulic Research Institute,Nanjing 210029,China;Nanjing Ruidi Technology Co.,Ltd.,Nanjing Hydraulic Research Institute,Nanjing 210029,China)

机构地区：[1]南京工业大学材料科学与工程学院,江苏南京211800 [2]南京水利科学研究院材料结构研究所,江苏南京210029 [3]南京水利科学研究院南京瑞迪科技集团有限公司,江苏南京210029

出　　处：《南京工业大学学报（自然科学版）》2024年第5期490-501,共12页Journal of Nanjing Tech University(Natural Science Edition)

摘　　要：Cl^(-)入侵会造成钢筋表面钝化膜被破坏,导致钢筋锈蚀,严重损害钢筋混凝土的结构耐久性。电化学除氯(ECE)作为有效去除混凝土中Cl^(-)的方法得到不断发展。本文主要介绍近年来电化学除氯技术的成果,分析电化学除氯的机制以及影响因素,包括电流密度、阳极种类、电解质溶液种类、活性填充料种类、水灰比、钢筋和阳极布置方式以及保护层厚度,讨论电化学除氯对钢筋混凝土的黏结性能、孔隙率、离子分布、抗渗透性能和电化学性能的影响,提出电化学除氯的发展方向,为采用电化学除氯技术提高钢筋混凝土的耐久性提供借鉴和参考。Chloride ion intrusion can damage the passivation film on the surface of steel bars,leading to corrosion and severely compromising the structural durability of reinforced concrete.Electrochemical chloride extraction(ECE)has been continuously developed as an effective method to remove chloride ions from concrete.This paper presents recent achievements in ECE technology,analyses its mechanisms and influencing factors,including current density,anode types,electrolyte solutions,active filler types,water-cement ratio,arrangement of steel bars and anodes,and thickness of concrete cover.Furthermore,it discusses the impact of ECE on the bonding performance,porosity,ion distribution,impermeability,and electrochemical performance of reinforced concrete.The paper proposes future directions for ECE development,providing a reference for improving the durability of reinforced concrete using ECE.

关 键 词：氯离子 钢筋锈蚀 钢筋混凝土 电化学除氯 耐久性 

分 类 号：TU528[建筑科学—建筑技术科学]