Hello, Friends &
Engineers. We learn about the drawbacks and benefits of AAC blocks in this post.
The classic red brick is been replaced with AAC blocks in the construction.
Over time, the building Construction has changed
in response to population growth and changing consumer demands. Prior to the
introduction of red clay bricks, we used to build our homes out of mud bricks.
Yet, burned clay bricks are known to demand a
lot of energy and produce smoke. They are also made from the richest soil.
Thus, it's necessary to locate alternative building materials.
The full name of AAC blocks is Aerated Autoclave
Concrete. It is made when cement, lime, and fly ash interact in a proportionate
ratio with aluminium. As a result of the hydrogen gas escaping during this
process, millions of small air cells are formed, giving AAC its sturdy cell
structure. It is strengthened considerably further by autoclave steam curing
under high pressure. In recent years, autoclaved aerated concrete blocks have
been used in building construction.
Benefits of AAC Blocks
The structural dead load is decreased.
Red bricks weight is more, while autoclave
aerated concrete blocks weigh less. Dead weight on buildings is decreased by
60%.
Red bricks need more jointing mortar when using
AAC bricks, which is less.
Autoclave Aerated Concrete Blocks have high
compressive strength compared to Red brick’s
AAC blocks are simple to install because to
their amorphous shape and size. Plastering is not needed because it is smoother
and has an excellent finish.
Seven red bricks are needed to make one AAC
brick.
AAC blocks provide excellent fire resistance.
Around 10% of the weight of AAC Blocks is taken
up by water.
It offers better soundproofing and improved
protection against loud sounds.
Autoclave aerated concrete block waste is
minimal.
An issue with AAC blocks
AAC blocks are non-load bearing, hence they can only be utilised as material for wall dividers.
They soak up a lot of moisture. As materials absorb water, they expand, and when they release it, they contract, causing cracks in the structure.
Autoclave aerated concrete blocks are fragile by nature and are therefore susceptible to breaking. The existence of voids makes it fragile.
In humid conditions, interior finishes must have low vapour permeability, but outdoor finishes must have high vapour permeability.
In humid conditions, interior finishes must have low vapour permeability, but outdoor finishes must have high vapour permeability.
It costs extra to create each unit as a result.
Plaster occasionally fails to adhere correctly due to its smooth surface. AAC blocks must be produced with care to prevent their surfaces from becoming too smooth.
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