Performance of Potential Pozzolanic Cement in Chloride media

Abstract

The paper presents finding of the pozzolanic activity of calcined clays from selected regions of Embu County – Kenya. The results are also presented for the compressive strength development and Chloride ingress resistance of the blend of the calcined clays with Ordinary Portland Cement (OPC), vis a vis commercial OPC and Portland Pozzolana cement (PPC). The objective of the study was to investigate the viability of using locally available materials to make affordable cementitious materials. Sampled clays were activated at different temperatures and time and blended with OPC at different replacement levels. The blends were subjected to accelerated chloride ingress. The blended cement and commercial PPC showed lower chloride ingress, in terms of apparent diffusion coefficients, compared to OPC with the blended cement exhibiting least chloride ingress