Studies on the Influence of Limestone-Calcined Clay Blend on the Hydration of Cement

摘要

The conventional use of binary cement is changing towards a composite cementitious system which allows two or more supplementary materials in combination. In this way, present study focuses on the preparation of limestone-calcined clay blend and introduction into cement system at variable replacement level to study their influence on the properties of resulting concrete. The hydration behaviour of the ternary blended cement was carried out using heat of hydration and XRD analysis. Similarly, compressive strength was performed on mortar cubes at different hydration ages (1, 3, 7 and 28 days). From this study, it was observed that, the limestone in the presence of calcined clay results in the formation of additional hydrates. Furthermore, it is found that this ternary combination can significantly improve the substitution level of clinker with good mechanical characteristics.