Fly Ash Blocks, Color : Grey

fly ash brick (fab) is a building material, specifically masonry units, containing class c or class f fly ash and water. Compressed at 28 mpa (272 atm) and cured for 24 hours in a 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 is described as "self-cementing". The manufacturing method saves energy, reduces mercury pollution, and costs 20% less than traditional clay brick manufacturing.

ever since fal-g (fly ash-lime-gypsum) process is introduced in 1991, fly ash brick activity has been revolutionised in india. developed and patented by drbhanumathidas and kalidas has simplified the process by adding gypsum to fly ash+lime/cement, converting the calcium aluminates into calcium alumino-sulphates resulting in to achieve high early strengths.thus fal-g brick does not need any pressure and gets cured at ambient temperature of 20-40 °c. By avoiding both press and heating chamber, fal-g process has brought down the multi-million plant cost to a few lakhs, within the reach of micro units