Portland cement with limestone additive based on local raw materials

Abstract

This study investigates the influence of limestone additive on the physico-mechanical and chemical properties of Portland cement produced from local raw materials. Introducing limestone in amounts of 10–20 % improves the granulometric composition of cement, enhances the workability of cement paste, reduces clinker consumption, and accelerates early hydration. Experimental results showed that at the optimal additive content, sufficient compressive and flexural strength is achieved within the standard setting periods. The results confirm the feasibility of effective use of local limestone in the production of blended Portland cements that meet modern standards, allowing clinker savings and reducing production costs.