溶液种类对电沉积修复混凝土裂缝效果的影响

The Effect of Solution Types on the Electrodeposition in Repairing Concrete Cracks

摘要: 电沉积方法是通过电场诱导水环境中离子迁移、沉积生长来实现裂缝修复，对地下结构微细渗漏裂缝修复具有良好前景。本文探究了三种不同弱酸电解质复合溶液(乙酸钙–硫酸铝、乙酸钙–乙酸镁、乙酸锌–柠檬酸钠)电沉积修复规律，比较了这几种体系的宏观修复效果，分析了它们的微观修复机理，发现乙酸钙–硫酸铝体系修复速率快，裂缝断面覆盖率高，抗渗性能提升明显，修复前后渗透系数下降近四个数量级。这为地下结构电沉积修复的溶液选择提供物理基础。

Abstract: The electro deposition method achieves crack repair by inducing ion migration and deposition growth in the water environment through an electric field, and has good prospects for repairing micro leakage cracks in underground structures. This article explores the electro deposition repair laws of three different weak acid electrolyte composite solutions (calcium acetate aluminum sulfate, calcium acetate magnesium acetate, zinc acetate sodium citrate), compares the macroscopic repair effects of these systems, analyzes their microscopic repair mechanisms, and finds that the calcium acetate aluminum sulfate system has a fast repair rate, high crack section coverage, significant improvement in impermeability, and a decrease of nearly four orders of magnitude in permeability coefficient before and after repair. This provides a physical basis for the selection of solutions for the electro deposition repair of underground structures.