Fly ash brick
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Fly ash brick (FAB) are building materials, specifically masonry units, containing Class C fly ash and water. Compressed at 4,000 psi and cured for 24 hours in a 150 °F (66 °C) steam bath , then toughened with an air entrainment agent, the bricks last for more than 100 freeze-thaw cycles. Owing to the high concentration of calcium oxide in class C fly ash, the brick can be described as "self-cementing". The manufacturing method is said to save energy, reduce mercury pollution, and costs 20% less than traditional clay brick manufacturing.
The raw material that is used for fly ash brick are:
Fly ash
Sand/Stone dust
Lime
Gypsum
Cement
ADVANTAGES :-
1. Due to high strength, practically no breakage during transport & use. 2. Due to uniform size of bricks mortar required for joints & plaster reduces almost by 50%. 3. Due to lower water penetration seepage of water through bricks is considerably reduced. 4. Plaster of Paris / Gypsum Plaster can be directly applied on these bricks without a backing coat of plaster 5. These bricks do not require soaking in water for 24 hours. Only sprinkling of water before use is enough.The raw material that is used for fly ash brick are: Fly ash Sand/Stone dust Lime Gypsum Cement
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