This experiment reports using clayish crushed stone for production of aerated concrete.B05 and B06 grade aerated concrete were prepared successfully using different clay content.
Aerating also exposes the wine to oxygen, and oxygen causes oxidation: a rearrangement of electrons that can shift a chemical's properties and help break down molecules.
Workers want to be close to job opportunities and companies want to be close to workers. So the whole industry has aerated in just a handful of locations.