Link points to Internet Archive / others. Not hosted by InfraLens. Details
IS 11239:2007 is the Indian Standard (BIS) for cellular concrete products. IS 11239 covers autoclaved aerated concrete (AAC) blocks and panels. AAC is a lightweight, insulating building material with density 450-1000 kg/m³ (vs normal concrete 2400). Increasingly popular in India for non-load-bearing walls due to lower weight, better insulation, and faster construction.
Specification for precast cellular (aerated) concrete products including blocks and panels, covering classification, properties, dimensions, and testing.
Grade 3 and Grade 4 (strength 3-4 MPa) can be used for low-rise load-bearing walls. For high-rise, AAC is typically used only for non-load-bearing infill walls with RCC frame structure.
What is the advantage of AAC over clay bricks?+
3-4x lighter (reduces structural load), better thermal insulation, larger size (faster laying), precise dimensions (thinner joints), and fire resistant (4 hour rating). Main drawback: higher unit cost and needs special mortar/adhesive.