Brief description about AAc Blocks

AAC Blocks- Autoclaved Aerated Concrete Blocks

AAC (Autoclaved Aerated Concrete) Block is a certified green building material. These precast concrete blocks are extremely lightweight and widely used for internal and external construction. It is a Lightweight, Load-bearing, High-insulating, Durable building product- which is produced in wide range of sizes and strengths. AAC Block is lightweight and when compared to red bricks AAC blocks are three times lighter. The Autoclaved Aerated Concrete (AAC) material was developed in 1924 in Sweden. It has become one of the most used building materials in Europe and is rapidly growing in many other countries around the world. AAC offers incredible opportunities to increase building quality and at the same time reduce costs at the construction site. AAC is produced out of a mix of quartz sand and/or pulverized fly ash (PFA), lime, cement, gypsum, water and aluminum and is hardened by steam-curing in autoclaves. As a result of its excellent properties, AAC is used in many building constructions, for example in residential homes, commercial and industrial buildings, schools, hospitals, hotels and many other applications. AAC contains 60% to 85% air by volume.

AAC Block Advantages

Eco Friendly

Reduces at least 30% of environmental waste

Light weight

50% lighter than CLC blocks

Design Flexibility

Easy to cut, drill, nail, mill and groove

Faster- Construction

20% reduction in construction time

Low Maintenance

Overall construction cost reduces by 15 to 20%

Seismic Resistant

Decreases the impact of an earthquake

Technical Details

Dimensional Precision

+/- 2mm

Precision in Size

Variation 2mm (+/-)

Compressive Strength

35kg to 40kg per Cm2 / 3.5 to 4.0 N/mm2 conforming to IS 2185/1984

Fire Resistance

1600° Celsius for 6 hours for a block with 200mm thickness


600-650 kg/m3 (dry)

Sound Reduction

45db for 200 mm thick wall

Thermal Conductivity

Low / 0.16 kelvin per meter


Light Grey

AAC Block Comparison