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 alkali-activated 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.
