To study the combined effect of mineral admixtures on the properties of fresh concrete as partial replacement to cement to achieve sustainable concrete

Abstract: Concrete is one of the most used universal material. Use of concrete is increasing day by day due to increasing infrastructure demand. Increased use of concrete results in an increased use of cement, one of the most important ingredient of concrete in terms of strength and binding. Energy utilization while manufacturing of cement is very high. Besides it is also responsible for release of carbon dioxide into the atmosphere , a major reason for global warming and air pollution . Researchers globally have therefore put forth their investigations about mineral admixtures, to be used as partial replacement to cement . In the present study the two mineral admixtures to be investigated are Rice husk ash(RHA) and Sugarcane bagasse ash (SCBA) and their combined effect on the fresh properties of cement for various replacement percentages. Their use is promoted in most of the countries due to the minimization of the hazardous effects of concretization on the environment. Hence in this study the fresh properties of concrete like standard consistency, workability, compaction factor and bleeding are investigated after partially replacing cement with these admixtures. Reduction in usage of cement will be a step towards reduction in the emission of greenhouse gases and achieving a sustainable environment for the future generations.

Keywords: water cement ratio, slump , compaction factor , Workability , setting time , bleeding , Interstitial pores