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为了更有效利用钢渣废料,通过与无钢渣再生骨料自密实混凝土的对比试验,研究了不同磨细钢渣取代率(10%、20%、30%、40%和50%)对再生骨料自密实混凝土的抗压强度、劈裂抗拉强度和微观结构的影响.试验结果表明:随着钢渣取代水泥量增大,混凝土28 d抗压强度不断降低,劈裂抗拉强度呈先增大后减小的趋势;采用15%的粉煤灰和10%的钢渣替代水泥可以制备出性能更优的掺钢渣再生骨料自密实混凝土(28 d抗压强度相近,劈裂抗拉强度更高);其弹性模量比与普通混凝土相比略有下降;提出了弹性模量、劈裂抗拉强度与抗压强度的计算关系式.
In order to make more effective use of steel slag scrap, the effects of replacement ratio (10%, 20%, 30%, 40% and 50%) of recycled steel slag Compressive strength, splitting tensile strength and microstructure of concrete.Experimental results show that with the increase of steel slag instead of cement, the compressive strength of concrete decreases continuously at 28 d, the splitting tensile strength first increases The trend of decreasing is that 15% fly ash and 10% slag can replace cement to make better self-compacting concrete with steel slag (28d compressive strength and higher splitting tensile strength) ; Its elastic modulus is slightly lower than that of ordinary concrete; and the calculation formula of elastic modulus, splitting tensile strength and compressive strength is proposed.