Autoclaved aerated concrete

Autoclaved aerated concrete (AAC), also known as autoclaved cellular concrete or autoclaved concrete, is a lightweight, precast building material that is used as an alternative to traditional concrete blocks and clay bricks. It was developed in the mid-1920s by Johan Axel Eriksson. Unlike cellular concrete, which is typically mixed and poured on-site, AAC products are manufactured in a factory under controlled conditions.

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Source: Wikipedia · Image: Wikimedia Commons · CC BY-SA 4.0

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