# What happens to Aluminium in Autoclaved Aerated Concrete

Aluminium is used in Autoclaved Aerated Concrete in order to produce the holes.

On Wikipedia I'm reading about the ingredients: sand, calcined gypsum, lime (mineral), cement, water and Aluminum powder.

Also it says "Aluminum powder reacts with calcium hydroxide and water to form hydrogen".

I'm wondering what Aluminium ends up as if anyone can help with detailed reactions.

$$\ce{2Al + 7Ca(OH)2 -> Ca[Al(OH)4]2 + 3H2 ^ + 6CaO}$$ or maybe $$\ce{2Al + Ca(OH)2 + 6H2O -> Ca[Al(OH)4]2 + 3H2 ^}.$$