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The purpose of this study was to evaluate the benefits of replacing Ordinary Portland Cement (OPC) withCorncob Ash (CCA) blended cements. The cement industry contributes considerable amount of CarbonDioxide (CO2) emissions into the atmosphere. The main contribution of CO2 emissions from cementproduction results from the process of creating Calcium Oxide (CaO) from limestone (CaCO3) commonlyknown as the calcination process. Blending OPC with a pozzolanic material will assist in the reduction ofCO2 emissions due to calcination as well as enhance the quality of OPC. There are various pozzolanicmaterials such as fly ash, rice husk, silica fume and CCA that could be promising partial replacement forOPC. In this study, CCA will serve as the primary blending agent with OPC. An experiment wasperformed to designate an appropriate percentage replacement of CCA that would comply with specificstandards of cement production. The experimental plan was designed to analyze compressive strength,workability and thermal performance of various CCA blended cements. The data from the experimentindicates that up to 10% CCA replacement could be used in cement production without compromising thestructural integrity of OPC. In addition, it was found that the compressive strength and workability of theresulting concrete could be improved when CCA is added to the mixtures. Furthermore, it was shown thatthe introduction of 10% CCA can lead to significant reduction in thermal conductivity of the mixture.
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