The Fly Ash Bricks have the following Advantages:

• Saves Construction Cost
  Due to the uniform shape and size of the fly ash brick,it saves labor in laying bricks by
  about 15%. This translates into reduction in labor cost in laying each brick, which is
  quite substantial.
• Less Water Seepage and Dampness in wall
  Due to high strength and less water absorption of fly ash bricks there is less water
  seepage and dampnessin walls of building.
• Less Energy
  Huge Energy is Consumed in heating clay bricks in kilns. By using fly ash bricks much
  energy is saved in brick manufacturing
• Reduction in Air Polluction
  Much fossil fuel is used in heating clay bricks in kilns. Burning such fuel generates air
  pollution and greenhouse gas(CO2), contributing to global warming