Non-Autoclaved Aerated Concrete (NAAC) is a lightweight, insulating, and cost-effective building material produced without using high-pressure autoclaves.

Instead of steam curing in autoclaves, NAAC blocks are cured at ambient temperature or in low-energy thermal chambers, significantly reducing energy consumption and equipment costs.

NAAC combines cement with mineral fillers such as sand, fly ash, or other pozzolanic materials. It may also incorporate lime, gypsum, or similar calcium-based additives to enhance setting and strength development. In the production process, aluminum powder is used as a foaming agent, reacting with the alkaline components to form a porous cellular structure. The result is a lightweight, thermally efficient block suitable for modern construction needs.