钢渣细度和掺量对钢渣复合水泥力学性能的影响

Influence of Steel Slag Fineness and Mixture Amount on Composite Cement Containing Steel Slag Powders

为找出在钢渣复合水泥中钢渣的最佳细度和最佳掺量,从钢渣的粉磨时间、掺量、不同助磨剂的作用和水泥配比等方面研究钢渣细度及掺量对复合水泥力学性能的影响,分析各个影响因素的作用。结果表明,随着磨细钢渣粒度的减小,钢渣复合水泥的抗折、抗压强度会有不同程度的提高;磨细钢渣的掺量为10%和20%时,钢渣复合水泥的力学性能较好,抗折、抗压强度甚至超过纯水泥;当掺量为30%和40%时,复合水泥力学强度下降幅度较大,3 d抗折强度不符合国家标准规定。

In order to get the optimal steel slag fineness and the best mixture amount of steel slag powders in the composite cement containing steel slag, the influence of fineness and mixture amount of steel slag powders on the mechanical property of composite cement were studied based on the grinding time of steel slag, mixture amount, application of different grinding agent and proportion of cement and ground steel slag powders. The effect of each factor was analyzed. The results show that the flexible strength and compressive strength of composite cement increase to some extent with the decrease of particle size of ground steel slag. When the mass fraction of ground steel slag powders in composite cement is 10% and 20%, the mechanical property of the composite cement improve, its flexible strength and compressive strength exceed the pure cement. When the mass fraction of ground steel slag powders is 30% and 40%, the mechanical strength of the composite cement decrease obviously, 3 d flexible strength does not meet the requirements of the national standard.