Optimization of Fly Ash-slag Based Cementitious Material Proportions Based on Response Surface Method

Abstract

Fly ash, slag, and carbide slag are wastes generated from industrial production. As bulk industrial solid wastes, the efficient utilization of these industrial by-products has long been a pressing issue. Research on these wastes has been increasing both domestically and internationally, and wastes such as fly ash have been widely applied, particularly in the field of civil construction materials. They can not only be used as raw materials for cement but also as admixtures in construction mortar and concrete, aiming to achieve high-performance utilization by optimizing the proportioning of cementitious materials. However, there are still challenges in the optimal mix design of solid waste-based materials. By scientifically optimizing the mix proportions, the core properties of cementitious materials, such as strength and durability, can be precisely regulated, addressing the issue of performance fluctuations caused by solid waste incorporation and ensuring they meet the requirements of various construction scenarios. This study optimizes the proportion of fly ash-slag-based all-solid waste cementitious materials using the response surface methodology, exploring the interactions between activators and solid waste materials.