02/03/2021
Why To Start Fly ash Bricks Manufacturing Business ?
180 billion tons of common burnt clay bricks are consumed annually. Approximately 340 billion tons of clay- about 5000 acres of top layer of soil dug out for brick manufacture. Demand for dwelling units likely to rise to 80 million units by year 2018 for lower middle and low income groups. Demand for dwelling units will further grow to 90 million by 2020. The Indian housing sector at present faces a shortage of 20 million dwelling units for its lower middle and low income groups which will witness a spurt of about 22.5 million dwelling units. There is ample scope for fly ash brick and block units as government has ambitious plan of providing house for all by 2022. This will increase the demand for fly ash bricks substantially in the coming years.
What is Fly Ash Brick?
Fly ash bricks is a building material specifically masonry units containing class C or class F fly ash and water, compressed and cured for 24 hours in a 66 °C steam bath, then toughened with an air entrainment agent. Fly ash bricks are lighter and stronger than clay bricks. Main ingredients include fly ash, water, quicklime or lime sludge, cement, aluminium powder and gypsum. Autoclaving increases the hardness of the block by promoting quick curing of the cement.
Raw material Used in Fly Ash Bricks
Fly Ash Bricks are manufactured using Major percentage of fly ash generated from Thermal Power stations. Other raw materials used along with Fly Ash are lime and calcined gypsum. Fly ash is a fine, glass-like powder recovered from coal-fired electric power generation. They consist mostly of silicon dioxide (SiO2), aluminium oxide (Al2O3) and iron oxide (Fe2O3).
