混凝土电渗排水的水分迁移规律试验初探

Experimental Research Scheme of Water Migration Rule in Electroosmotic Drainage of Concrete

摘要: 本试验旨在研究混凝土电渗排水过程中的水分迁移规律并确定影响因素最优水平组合。自制电渗试验装置，设置水灰比、缓凝剂、阳极钢筋直径、通电电压、阴阳电极间距、通电起始时间、通电持续时间七种因素，通过正交试验设计和部分因素全面试验，以混凝土电渗排水量为指标，研究阳极钢筋直径、通电电压、阴阳电极间距三种因素的最好水平、最优水平组合及对指标影响的重要程度。试验依据电解水和电渗基本原理进行，采用商品河砂、石子和P.O 42.5普通硅酸盐水泥配制C35混凝土试样。试验结果将为地下厂房超高竖井混凝土电脱膜施工组织提供参考依据，有望提高工程质量和效率，同时也为混凝土电渗排水技术的进一步优化提供了理论基础和实践指导。

Abstract: The purpose of this experiment is to study the law of water migration in the process of concrete electroosmotic drainage and determine the optimal level combination of influencing factors. Seven factors, including water-cement ratio, retarder, diameter of anode steel, energized voltage, distance between anode and cathode electrodes, energized starting time, and energized duration, were set up in a self-made electroosmotic test device. Through orthogonal test design and comprehensive test of some factors, the electroosmotic displacement of concrete was taken as the index. The optimum level and combination of the three factors of anode bar diameter, current voltage, and electrode distance between anode and cathode were studied. The test was carried out according to the basic principles of electrolytic water and electroosmosis, using commercial river sand, stone, and P.O 42.5 ordinary Portland cement with C35 concrete samples. The test results will provide a reference for the construction organization of concrete electrode membrane in the ultra-high vertical shaft of the underground powerhouse, which is expected to improve the quality and efficiency of the project and also provide a theoretical basis and practical guidance for further optimization of concrete electroosmotic drainage technology.