Fly ash bricks are unconventional bricks manufactured from industrial wastes such as fly ash, cement, and sand/stone dust. These types of bricks are nowadays used worldwide with gaining popularity over clay bricks.
For construction projects, fly ash bricks are utilized as an alternative to burnt clay bricks. A fly ash brick may withstand more than 100 freeze-thaw cycles if compressed at a pressure of 28 MPa, cured for 24 hours in a steam bath at 66°C, and stiffened with an air-entrainment agent.
These bricks are considered “self-cementing” since class C fly ash contains a significant amount of calcium oxide. Fly ash brick production uses less energy, emits less mercury into the atmosphere, and frequently costs 30% less than traditional clay brick production.
Environmentally friendly hydraulic pressure devices are used to produce fly ash bricks. These bricks have a compressive strength greater than 40 Mpa and are 28% lighter than normal clay bricks.
