• Geopolymer bricks are essentially made from aluminosilicate material. In a highly alkaline environment, silicon hydroxides and aluminium hydroxides are released from the material. Subsequently, the polycondensation reaction leads to solidification, whereby an aluminosilicate tetrahedral polymer network is formed.
• Red mud and phosphogypsum belong to the family of wastes produced in large quantities, like blast furnace slag (BF slag), fly ash, or municipal waste incineration ash (MWA). Using red mud for the production of bricks is a simple and economical method to utilize this waste material. These are also environmental saving, recycling of waste materials, good mechanical properties as compared to other wood substitutes, and good fire retardancy are the main causes for its utilization. Eco-friendliness, cost-effectiveness are the major advantages of these bricks.