The main material could be smashed/pulverized glass.

As in sand. Glass is recyclable material, it makes no sense to use that for this kind of application since sand is already everywhere. Also at least some flavours of glass can melt on temperatures used on these which I'd imagine could cause problems.

I hear aircrete is an insulation thats already prevalent in europe is this true?

At least here in Finland it is not. It could be, but it's not really widely available right now. Maybe in the future, but that would need at least some changes on how things are built.