Partially Replacement of Cement by Fly Ash and Rice Husk Ash

In recent year, Many researchers have established that the use of supplementary material like FA & RHA etc. can not only improve the various properties of concrete both in its fresh & hardened states, but also contribute to economy in construction cost. FA is collected from Reliance Thermal power plant Nagpur. RHA is collected from Bhandara. In this paper, the detailed experimental investigation is done to study the effect of partially replacement of cement by FA & RHA in combined proportion started from 20% FA & 20% RHA mix together in concrete by replacement by cement with gradual increase of RHA with 5% & decrease of FA with 5%. Last proportion is taken 10% FA & 35% RHA. Concrete mixtures were produced, tested & compared of compressive strength with conventional concrete. This taste carried out to evaluate the compressive strength at a various curing period such as 7, 14 & 28 days. Test conducted for fresh concrete for workability rest like slump test & compaction factor test.