Foam Generator for Aerated Block

Hi Wal,

I gave you a GA

So, it's not just a case of adding a bit of "Car Wash Foam", looks like a huge investment in plant.

Best regards,

John

No, carwash equipment is unlikely to work.
Styrofoam beads could be added to concrete mix, as could screened pieces of chopped "Styrofoam" (foamed plastic). People have used large chunks of Styrofoam, but this produces a mix that varies too much in compressive strength from point to point. Foamed plastics can usually be obtained for free, from the local waste stream. Given that a large portion of the cost of stone, concrete, etc is trucking, perhaps even the traditional lightweight fillers like perlite or pumice could be added without increasing cost.
Canoes have been built with ultralight concrete in which glass bubbles are used as a filler -- although glass bubble are expensive -- probably not a reasonable alternative.