A Review on Light Weight Concrete using Coal and Fly Ash

Lightweight concretes can either be lightweight aggregate concrete, foamed concrete or autoclaved aerated concrete (AAC). Such lightweight concrete blocks are often used in house construction. Nearly all LWACs are fire resistant. In addition, depending upon the densities and strength, the concrete can be easily cut, nailed, drilled, and chased with ordinary wood working tools. This paper is a study about Lightweight concrete which are manufactured by composition of Fly ash, cement and sand with requisite quantity of water mixed in proper proportions. These concrete are comparatively lighter in weight and stronger than the ordinary concrete. The Fly ash is one of the major by-product of thermal power plants, 1kg of coal on burning produces about 200 to 500gms of Fly ash. Thus, Fly ash is very easily available which can be used to manufacture light weight concrete as a substitute of ordinary concrete which could lead to reduce the environmental pollution and help in conserving natural resources. I will calculate compressive strength using fly ash and coal.