摘要:
从钢渣作为混凝土粗骨料的可行性研究着手, 通过XRF、XRD和SEM微观测试手段研究了钢渣的形貌、化学成分及矿物组成等特性。在钢渣稳定性试验方法的基础上, 分别测定钢渣掺量为100%、75%、50%、25%、0%的粗骨料压蒸粉化率, 并相应制取钢渣混凝土试件, 测定不同龄期下的抗压强度, 28 d测其稳定性。结果表明:钢渣作为混凝土粗骨料可行;随着钢渣配比的增加, 对应的混凝土稳定性变差, 以50%掺量为最佳, 对应的粉化率为4.7%。
关键词:
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钢渣 /
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混凝土 /
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粗骨料 /
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粉化率 /
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抗压强度 /
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稳定性
Abstract:
From the view of feasibility study on steel slag as coarse aggregate of concrete,morphology,chemical composition and mineral composition and other characteristics of steel slag had been investigated through the XRF,XRD and SEM microscopic observation. Different coarse aggregates had been prepared with addition of 100%,75%,50%,25%,and 0% steel slag.Based on the determination method for steel slag stability,autoclaved powder ratio of resulted coarse aggregated had been measured.The corresponding concrete test block made of the different aggregate had been test in terms of its compressive strength at different ages and its stability after 28-day aging.The results show that the steel slag can be used as the coarse aggregate of concrete.With the increase of the proportion of steel slag,the stability of the concrete is reduced,the optimum content is 50%,and the corresponding powdering rate is about 4.7%.
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