Saturday, 14 November 2015

Effect of Replacement of Cement by Different Pozzolanic Materials on Heat of Hydration and Setting Time of Concrete

Abstract The paper aims to focus on the possibility of using industrial by products like SF, GGBS, FA and MK. The utilization of pozzolans is well accepted because of several improvements possible in the concrete composites. The present study reports the results of experimental study conducted to evaluate Setting Time, HOH and Compression Strength of Concrete, by partially replacing cement by various percentages of silica fume (SF), ground granulated blast furnace slag (GGBS), fly ash (FA) and metakaolin (MK) (5%, 10%, 15%, & 20%). The Heat of Hydration (HOH) and Compression Strength test are done for M30 grade concrete. The effort is made towards a specific understanding of efficiency of pozzolans in concrete considering the percentage of replacement and combinations of pozzolans. The pozzolans replacement as cementitious material is characterised by high compressive strength, low heat of hydration and increased initial and final setting time of concrete.

Keywords Concrete, GGBFS, Fly Ash, Silica Fume, Metakaolin, Heat of Hydration, Setting time, Shear test.

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