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通过控制掺入硅灰和矿粉的量,制备了3个系类10种不同配比的混凝土。测试混凝土在循环制度一(干燥6h,浸泡18h)和循环制度二(干燥24h,浸泡48h)的抗氯离子渗透性能。实验结果显示:干湿循环频率越慢,混凝土内部的氯离子浓度越低;混凝土的抗氯离子渗透能力随着单掺矿物掺合料掺量的增加而增加,掺硅粉混凝土的抗氯离子能力更好,当硅粉的量为20%时,混凝土内部的氯离子浓度最低;双掺硅灰和矿粉不能提高混凝土的抗氯离子渗透能力;混凝土内部的氯离子浓度随着深度的增加而降低。
By controlling the amount of silica fume and slag, three series of 10 different proportions of concrete were prepared. The concrete was tested for its resistance to chloride ion penetration in a circulation system (6h drying, 18h soaking) and 2 cycles (24h drying, 48h soaking). The experimental results show that the slower the wetting and drying cycles, the lower the concentration of chloride ions in the concrete. The resistance to chloride ion penetration increases with the content of single mineral admixture. The chloride ion Better ability, when the amount of silicon powder is 20%, the concrete interior chloride ion concentration is the lowest; double silica fume and slag can not improve the concrete resistance to chloride ion penetration; concrete chloride ion concentration with increasing depth Lower.