Aerated Autoclaved Concrete (AAC)
Aerated Autoclaved Concrete (AAC) is a concrete-based building material for making walls, floors, and roofs.
It is lightweight, fire-resistant and has excellent sound and thermal insulation. Another advantage of AAC is that it is easy to cut, shave, shape, and readily accept nails and screws.
Market Needs
Calcium hydroxide is an important raw material to produce Aerated Autoclaved Concrete (AAC).
Its roles are to generate hydrogen gas, which causes AAC to have a porous structure and lightweight, and to produce calcium silicate hydrate, contributing to the strength of AAC.
Solutions
Low-reactivity Quicklime
- A cost-effective choice for producing calcium hydroxide, with the heat from slaking reaction that helps solidify the green cake (a soft concrete before being transformed into AAC)
- Low reactivity with water allows hydrogen gas to form slowly, resulting in tiny and uniform bubbles throughout the green cake and preventing it from collapsing during the forming stage
