【摘要】 针对当前尚无公认的水泥混凝土用钢渣砂安定性检测和评价方法的现状,采用一种新的测试方法——5 h蒸汽粉化率法来评价钢渣砂的安定性,并以不同后期处理方式和不同钢厂的钢渣砂为对象,研究了5 h蒸汽粉化率与f-CaO含量和钢渣砂砂浆(SSM)断裂龄期的相关性,分析了蒸汽粉化率与80℃水热养护制度SSM的膨胀破坏行为关系.结果表明:蒸汽粉化率中的最大粉化率(PM)消除了膨胀组分在钢渣砂内分布不均的影响,且与钢渣砂f-CaO含量及砂浆稳定龄期近似呈指数规律发展,其相关系数大于0.90.据此提出最大蒸汽粉化率可用于钢渣砂安定性的初步评价.更多还原

【Abstract】 A new test method——5 hours’ steam pulverizing rate was used in this study to evaluate the soundness of steel slag sand used in concrete.The 5 hours’ steam pulverizing rate and relationship between it and the content of fCaO and stable ages or expansion behavior of mortars made with steel slag sand as fine aggregate(SSM) were investigated.The results show that a good correlation between the maximum of 5 hours’ steam pulverizing rate(P_M) and content of f-CaO and stable ages of SSM exists and uneven distribution of expansive components doesn’t affect the value of P_M.The soundness of steel slag sand can be preliminarily evaluated by P_M.更多还原