The combined action of Mg 2+ and Cl − ions in cement pastes

Abstract

In order to study the phenomenon of seawater attack on hydrated cement components, we focused our interest on the combined action of Mg 2+ and Cl − ions on hydrated cement pastes. Thus, cement pastes were prepared from portland cement and its mixture with 30% pozzolan (Santorin Earth). These pastes were cured in baths of varied concentrations of Mg 2+ and Cl − ions and stored in 18 ± 2° C. The hydration phenomena were studied in these cement pastes, by XRD and SEM.