碱激发矿渣-钢渣-粉煤灰复合胶凝材料的配比优化

Optimization of the Mixing Ratio of Alkali-excited Slag-steel Slag-fly Ash Composite Cementitious Material

为进一步提高矿渣、钢渣、粉煤灰等工业固废的综合利用率,选取矿渣、钢渣、粉煤灰、碱当量为影响因素,以28d抗压强度和压折比为响应值,采用曲面响应法对碱激发矿渣-钢渣-粉煤灰复合胶凝材料的原料配合比进行了优化设计。通过回归方程拟合分析和响应曲面分析,揭示了各影响因子对该碱激发材料性能的影响规律,并在此基础上确定了原料最佳配合比。研究结果表明,矿渣掺量为60%,钢渣掺量为20%,粉煤灰掺量为20%,碱当量为6%时,碱激发材料28d抗压强度和压折比分别达到47.8MPa和7.4MPa,所制备的材料展现出较高的强度、较低的脆性,综合性能较优。

In order to further improve the comprehensive utilization rate of industrial solid wastes such as slag,steel slag,and fly ash,it selected slag,steel slag,fly ash,and alkali equivalent as influencing factors,and used the 28d compressive strength and compression-fold ratio as response values.The surface response method was used to optimize the raw material mix ratio of alkali-activated slag-steel slag-fly ash composite cementitious materials.Through regression equation fitting analysis and response surface analysis,the influence of each influencing factor on the performance of the alkaliactivated material was revealed,and the optimal raw material mix ratio was determined on this basis.The research results show that when the slag content is 60%,the steel slag content is 20%,the fly ash content is 20%,and the alkali equivalent is 6%,and then,the 28d compressive strength and compression-fold ratio of the alkali-activated material reach 47.8MPa and 7.4MPa respectively.The prepared material exhibits high strength and low brittleness,and has excellent overall performance.