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Autoclaved fly ash bricks are a type of construction material made from fly ash, water, quicklime, and gypsum. These bricks are known for their durability, strength, and environmental benefits. Here’s an overview of autoclaved fly ash bricks:

Composition

Fly Ash: A byproduct from coal combustion in power plants. It is the primary component.

Quicklime: (Calcium oxide) Used to react with the silica in the fly ash.

Gypsum: Added to enhance strength and workability.

Water: For mixing and hydration of materials.

Manufacturing Process

Mixing: The raw materials (fly ash, quicklime, gypsum, and water) are mixed together.

Molding: The mixture is poured into molds to form bricks.

Curing: The molded bricks are cured in an autoclave, which is a high-pressure steam vessel. This process is called autoclaving and typically lasts for several hours. It enhances the chemical reaction between the lime and silica in the fly ash, creating a strong, durable brick.