The primary materials of fly ash brick are fly ash, stone dust/sand, lime, gypsum, and bonding agent. The mixture is carefully formulated to produce bricks with improved strength, consistency, and homogeneity.
A) Fly ash- 60-65%
Sand/Stone dust- 20-25%
Hydrated lime- 8-12%
Gypsum-5%
B) Fly ash- 50% to 60%
Sand/stone dust – 32%-40%
Cement – 8-10%
