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This paper summarizes the comparison between properties of Rice Husk Ash (RHA) and Metakaolin when used as partial replacement for Ordinary Portland Cement (OPC) in concrete. OPC was replaced with these mineral admixtures at 2%, 4%,6% and 8% by weight. 0% replacement served as the control. Compressive Strength test was carried out on hardened 150mm concrete cubes after at 7 & 28 days curing in water. Compression strength test confirms its suitability as a partial replacement mineral admixture.
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