Effect of Cost-Effective Alkaline Additives on the Hydration of Slag-Cement Mixtures

Abstract

We have investigated the effects of secondary raw materials content on the hydration of slag-cement mixtures. We focus on the important issue of studying cost-effective alkaline additives in binder mixtures based on phosphorus slag. We have analyzed the main phases in slag and ash and found that the most common phase was slag glass. This phase has considerable hydraulic properties due to high latent energy if we compare them to compare to those of the holocrystalline phase of the same compound. The process of adding small amounts of alkali and sulfates to vitreous slag activates its latent hydraulic properties. The effect of alkaline activators creates an alkaline environment required for the reactions between slag glass components. This article provides a way of determining the composition of raw mixtures and ensuring the possibility of correcting it, as well as a method for determining the proper (in terms of quality of concrete) pH value.