Experimental Study of Replacement of Ingredients of Concrete with Local Waste of Industries

Abstract

Use of recycled waste fly ash bricks in concrete can be useful for environmental protection and economical terms. Recycle of fly ash bricks as replacement of coarse aggregate are the Materials for the future. Same as fly ash is also a by-product from various industries. Fly ash is a group of materials that can vary significantly in composition. Its residue left from burning coal, which is collected on an electrostatic precipitator or in a bag house. It mixes with flue gases that result when powdered coal is used to produce electric power. The advantages of using fly ash for outweigh the disadvantages. The most important benefit is reduced permeability to water and aggressive chemicals. Properly cured concrete made with fly ash creates a denser product because the sizes of the pores are reduced. This increases strength and reduces permeability. Globally, the concrete industry consumes large quantities of natural resources, which are becoming insufficient to meet the increasing demands. At the same time, large number of old buildings and other structures have reached the end of their service life and are being demolished, resulting in generation of demolished concrete. Some of this concrete waste issued as backfill material, and much being sent to landfills. Recycling of fly ash bricks by using it as replacement to new aggregate in concrete could reduce concrete waste and conserve natural sources of aggregate. In this thesis we also found that due to addition of fly ash bricks increasing voids in concrete so we used granite dust its provided strength and remove voids. Fly ash is known to be good pozzolanic increase the ultimate compressive strength and workability of fresh concrete. At the 30% we get good result for replacement of concrete ingredient.