电沉积法封堵混凝土裂缝的效果与机理  

Effect and Mechanism of Electrochemical Deposition Method for Plugging Concrete Cracks

作　　者：任亮 朱洪波[1] 陈庆[1] 段立辉 REN Liang;ZHU Hongbo;CHEN Qing;DUAN Lihui(Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education,Tongji University,Shanghai 201804,China;Shanghai Zhenji Engineering Technology Development Co.,Ltd.,Shanghai 200436,China)

机构地区：[1]同济大学先进土木工程材料教育部重点实验室,上海201804 [2]上海振济工程技术发展有限公司,上海200436

出　　处：《建筑材料学报》2025年第4期375-384,392,共11页Journal of Building Materials

基　　金：“十四五”国家重点研发计划项目(2022YFC3803104)。

摘　　要：采用Cu、Zn、Fe阳极材料及CuSO_(4)、ZnSO_(4)、Fe_(2)(SO_(4))_(3)电解液,通过电化学沉积方法(EDM)来封堵钢筋混凝土裂缝,对比分析了电流密度、电解质溶液浓度和电沉积时间对裂缝表面闭合率、裂缝抗渗系数、离子在裂缝中的扩散深度及电极质量损失率等的影响,并通过X射线衍射和扫描电镜分析了电沉积产物的组成与形貌.结果表明:愈合裂缝中电沉积物的结晶程度较高,形态各异;较低的电流密度和电解液浓度最有利于EDM的堵漏效果.Cracks in reinforced concrete were sealed by electrochemical deposition method(EDM).Three types of anode materials,Cu,Zn,Fe and their corresponding CuSO_(4),ZnSO_(4),Fe_(2)(SO_(4))_(3) electrolytes were used in EDM.The effects of current density,electrolyte solution concentration,and electrodeposition time on crack surface closure rate,crack impermeability coefficient,ion diffusion depth in cracks,and electrode quality loss rate,were analyzed.The composition of the electrodeposited products was analyzed by X⁃ray diffraction and scanning electron microscopy.The results indicate that the degree of crystallization of electrodeposits is relatively high,and their shapes vary overall.Lower current density and lower electrolyte concentrations are most beneficial for the plugging effect of DEM on concrete cracks.

关 键 词：电化学沉积 电解阳极 混凝土 裂缝修复 

分 类 号：TU528.01[建筑科学—建筑技术科学]