【摘要】 采用60V稳压电源、饱和氢氧化钙溶液、钛金属网阳极对圆柱体混凝土试件进行连续14天的电化学除氯实验,研究不同配合比混凝土试件的通电量、氯离子排出量和混凝土中残余氯离子含量.结果表明:相同电场作用条件下,水灰比越小,混凝土电化学除氯时通过的电量越少,除氯效果越差;掺入硅灰、矿渣使通过混凝土的电量值明显减少,电化学除氯效果变差;掺粉煤灰混凝土的电化学除氯效果接近甚至高于基准混凝土.因此,针对不同配合比混凝土应采用不同的电化学除氯电压和除氯时间才能达到理想除氯效果.更多还原

【Abstract】 Electrochemical chloride extraction(ECE) treatment was applied to cylindrical concrete specimens for 14 days,and a constant electrical source with voltage of 60V,saturated calcium hydroxide solution and titanium mesh as the external anode were used in the treatment.The electric quantity passing different mixing proportion concrete specimen,the amount of extracted chloride ion and the amount of residual chloride ion were studied in this research.The results show that the electric quantity passing concrete specimen reduces and the chloride extraction efficiency decreases with the reduction of water-cement ratio when the concretes are treated under the same electric field.The addition of silica fume or furnace slag reduces evidently the electric quantity passing concrete and leads to a lower chloride extraction efficiency than the reference concrete.The concrete containing fly ash has a similar or a little higher chloride extraction efficiency than the reference concrete.Therefore,the electrical voltage and treatment duration should be changed according to different mixing proportion of concretes in order to reach a good chloride extraction efficiency.更多还原