Traditional bricks in the construction sector are quickly being replaced by AAC blocks, also known as autoclaved aerated concrete blocks. AAC is a foam concrete material up to three times more lightweight than ordinary bricks, making it simple to handle and put to use.
AAC is a familiar construction material in the industry. Instead, it came into being sometime during the 1920s. However, it became popular only in the past decade. If you are building a house, you should consider using AAC blocks rather than red bricks.
How are AAC blocks made?
AAC blocks are lightweight because of their porous, foam-like surfaces. Components like cement, water, sand, and lime are utilised to construct these blocks. Additionally, a tiny amount of raising agent is added, which helps create the porous structure.
Burnt clay bricks and AAC blocks are manufactured differently and use different ingredients. To make the AAC block construction lightweight and durable, it is autoclaved. An autoclave is a machine that can set high pressure and temperature to produce superheated steam.
Now, as the AAC is blended and cast, other substances are added to improve the properties of the AAC blocks. Calcium hydroxide and aluminium powder are combined, releasing water and hydrogen gas. The porous, foam-like structure that is produced at the end is primarily due to the frothing up of this gas. The completed structure is up to three times lighter than a typical cement block because the gas rises to a height of 3mm inside the mixture.
It takes the mixed slurry roughly 10 to 12 hours in the autoclave chamber to solidify. The sizes of AAC blocks are largely uniform worldwide. The price and the weight of the AAC block depend on the size you choose. Most often, people choose a size 600mmX 200mmX200mm. These blocks can weigh up to 15 kg each.