alt Hacker NewsAerated concrete is an established building material in some parts of the world. In Europe, a big manufacturer is Ytong, and they even make precast panels in addition to blocks.
It's made differently from this, though. It is aerated through a chemical reaction rather than mechanically.
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stoneman24 • yesterday at 8:24 PM
There was recently a crisis in older publicly constructed buildings in the UK that were built [0].The aerated concrete had a limited lifespan especially if it was damaged and had contact with water.
Lots of people looking for compensation and claiming mis-representation.
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The industrial version is produced in an autoclave, this allows precise control over density and final mechanical resistance/insulation values. Hence, the name the material is best known by - AAC.
On the other hand, the video linked attributes too much credit and complexity to the foam manufacturing method, it can certainly be done with very primitive technology. Here are some dudes doing it in a developing country, it's very very basic, the foam generator is basically a steel wool sponge where pressurized air combine with water containing the foaming agent. They give out the complete recipe and details of their tools:
https://www.youtube.com/watch?v=-h6zBbVkuQI