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探讨了钢纤维再生混凝土在氯盐侵蚀环境下的抗压性能。首先,在室内配制水灰比分别为0.45、0.53、0.61的标准立方体钢纤维再生混凝土试件各27个,在标准条件下养护28d;再将这三种水灰比的试件分别浸入浓度为2.0%、3.5%、5.0%的Na Cl溶液中浸泡50d、100d、150d,并测得其抗压强度;最后分别对标准立方体试件上深度为5mm~25mm处的氯离子含量进行了测定。试验结果表明:随着水灰比的减小,钢纤维再生混凝土抗压强度逐渐增大;在浸泡天数相同的条件下,其抗压强度随着氯离子浓度的增加呈降低趋势,且在同一深度下水灰比越大的试件,侵入的氯离子浓度越高;在浸泡浓度相同的条件下,其抗压强度随着浸泡时间的增长而降低。
The compressive properties of recycled steel fiber reinforced concrete under chloride salt environment were discussed. First, 27 standard cubic steel fiber recycled concrete specimens with water-cement ratios of 0.45, 0.53, and 0.61 were prepared indoors, respectively, and cured under standard conditions for 28 days. The specimens with these three kinds of water- 2.0%, 3.5% and 5.0% NaCl solution for 50d, 100d and 150d, respectively. The compressive strength was measured. Finally, the content of chloride ion in the depth of 5mm ~ 25mm on the standard cube was measured respectively. The experimental results show that the compressive strength of steel fiber reinforced concrete increases with the decrease of water-cement ratio. With the same number of soaking days, the compressive strength of concrete decreases with the increase of chloride ion concentration. The depth of the water-cement ratio greater sample intrusion, the higher the concentration of chloride ions; immersion concentration in the same conditions, the compressive strength decreases with increasing immersion time.