Critical Review on Types of Bricks Type 2: Fly Ash Bricks
In India, bricks are mainly composed up of clay, and are generally produced in traditional, unorganized small
scale industries. Bricks are important building material and about 250 billion bricks are annually produced by the industries.
Red clay bricks making consumes larger amount of clay which leads to top soil removal and land degradation. Large areas of
lands are destroyed every year especially in developing countries due to collection of soil from a depth of about 1 to 2 m
from agricultural land. An important step in brick making is firing of bricks in brick kilns which causes serious
environmental pollution and health problems. Brick burning largely influence the concentrations of greenhouse gases in the
atmosphere. This causes serious air pollution and also workers in brick industries are prone to respiratory diseases To avoid
all this environmental threats brick made of waste that is originated from the waste as a residue from the different industries
and factories, this types of bricks is termed as fly ash bricks which is composed by the different materials such as lime,
gypsum, sand, fly waste etc. The objective of this paper is to explain about manufacturing of fly ash bricks in present era and
advantages of using it as a construction material. In this paper author explain about advantages and disadvantages and
manufacturing process of fly ash brick. The main motive of this paper is to aware the people about the different devasting
effect that is slowly killing our environment by the use of red clay bricks and to promote the usage of fly ash bricks.
Keywords - Fly ash bricks, tests , manufacturing process