Sounds like a great idea, but I dont see that the airkrete and the aircrete(domegaia cellular concrete) have the same consistency. What seem to make airkrete an insulator is the magnesium concrete properties. Portland cement behaves differently. The aircrete or cellular concrete mixture that is shown on the domegaia videos looks much denser than that foam of the airkrete company. Since they are 2 completely different products then you may need to contract someone that is a specialist in airkrete. I guess you could inject cellular concrete by yourself, but you would have to use a different formula and experiment to get to that foamy consistency of the airkrete.com website. You wont have the same properties, though. The magnesium concrete absorbs CO2 while its curing and cures much faster than cellular concrete. I have not seen anyone successfully spray the aircrete on the domegaia videos or cellular concrete in any other video. The spraying process would surely kill the foaming that you had to achieve to get the aircrete. Spraying requires going to a fine nozzle under high pressure and the airkrete you are talking about is already a foam that is "injected". Check this : http://www.greenhomebuilding.com/QandA/manufactured/magnesiumoxide.htm

Hope this helps.

I checked out website and there is nothing available in the "Mini-Bar" area. So when they have some it will be nice.

Great Idea!

I will add 2 x 4" between the old walnut stringers. That way there will be a support every 24". I will test it out and let you know how it works.

Kind regards,
Larry

Google has an easy to use Gallons to Cubic Feet conversion tool:
https://tinyurl.com/ly72n72

50 US Liquid Gallons = 6.68 Cubic Feet

Yes unless you're creating a basement with your foundation.

It's a bit fragile but hard enough to start working with after 1 or 2 days. It continues to harden over time.

Thanks Joe, good luck with your project. The basalt products are impressive. When I tried to order some they were very expensive to bring to Hawaii so I haven't experimented with them yet. Let me know what you discover. Maybe we can get some for the Aug workshop?

Yes it is possible to make culvert pipe with aircrete. However yours is an engineering question that has too many variables to give a general answer.