COMPARATIVE STUDY ON COMPRESSIVE STRENGTH OF NORMAL MIX AND LIGNITE COAL FLY-ASH CONCRETE

Abstract

Fly ash which is also known as flue-ash, that the residues generated by burning waste materials, and containing the fine particles that produce with the flue gases. Ash which does not rise is termed bottom ash. In an industrial context, fly ash usually refers to ash produced during burning of coal. Fly ash is a waste product which is produced from thermal or coal based power plants. Use of fly ash in the concrete greatly improves many of its properties. Its use reduces hydration of heat, permeability and alkali aggregate reaction, improves workability, increased resistance to sulphate attack and corrosion thus making concrete mass more strong and durable. Besides these advantages, its use also reduces cost of concrete by using required quantity of cement. World over, in many of the developed countries, use of fly ash is one of the essential ingredient of durable concrete. Fly ash is generally captured by electrostatic precipitators or other particle filtration equipment before the flue gases reach the chimneys of coal-fired power plants and together with bottom ash removed from the bottom of the furnace is in this case jointly known as coal ash.

Present study aim is to carryout work on lignite coal fly ash as partial replacement with cement. Prepare normal mix concrete and lignite coal fly ash concrete mix and compare compressive strength of cube and cylindrical mould after 3 days, 14 days and 28 days respectively.