Use of Flyash & Lime as Partial Replacement of Cement and Partial Replacement of Fine Aggregate with Brick Kiln Dust

The research deals with the use of available Flyash and Lime as a partial replacement of cement and use of Brick Kiln Dust (BKD) as partial replacement of fine aggregate in concrete. The reuse of flyash and brick kiln dust is done which will reduce the amount of waste to be disposed of. As the flyash will reduce the use of cement, the pollution caused by emission of CO2 during cement manufacture will be reduced. So, the pollution caused due to both the reasons will be reduced. This paper mainly focuses on the use of waste i.e. flyash and brick kiln dust for production of eco-friendly and cost effective concrete. The objective of this paper is to find out the suitable proportions up to which cement can be replaced by flyash and lime corresponding to maximum compressive strength. Same objective goes for Brick kiln dust. The work is done for mix M25 High volume flyash concrete (HVFA) with 75% cement replacement by weight. Replaced portion contained different proportions of flyash and lime. Lime is being used in proportion from 30% to 40% by weight of replaced 75% cementitious material. The fine aggregate is being replaced with brick kiln dust in proportions from 5% to 40% by weight. Compressive strength test of cubes is tested at 7 days, 14 days & 28 days.