This is probably a stupid question but could you put aircrete inside an icf form instead of concrete?

there is alot of stupid question floating around these days, especially with ICF..........is aircrete like light weight concrete,,,,,,,,where do you come up with the stuff?

I was asking someone that knows about these things. Not a troll trying to be rude.

Such lightweight concretes typically require an autoclave - so you can't pour them onsite.

well as one troll talking with another, we've been doing ICF for over 15 years, sorry you don't have a sense of humor, aircrete is AUTOCLAVE, two different systems brother, now if you want to use lightweight concrete at double the regular concrete price (we've done it before) that is possible !
the great thing about ICF is that all of the big details have been worked out already, foam, concrete etc, if you start messing around with those basic components, all you do is add costs to your project..but i have had customers that love spending money on their ideas about ICF, going back to my stump home now!
good luck! and there are no stupid questions, unless of course it really is a stupid question!haha chill out

I misunderstood you and do apologize. The reason for the question is that I heard aircrete is almost as strong as concrete but with the r-value of foam. I thought maybe it would make the home an r-70 or r-80 rather than r-25.

Per inch, it's less strong than concrete and a worse insulator than EPS foam. When you look at the numbers in the US, you should find that the end result is more $ to get to the same strength and thermal performance as ICF.

If you really want R70, look at a cellulose filled double wall (concrete, wood or a combination).

"AirCrete is inexpensive, easy to make, and easy to work with. It requires only basic skills.

It's easy to make. And, like baking a cake, you have to get the recipe right. The quality and density of the foam is important. Use an accurate postal or kitchen scale to check the weight of your foam. It should be between 80 - 100 grams/liter (about 3 ounces/quart). "

https://youtu.be/b9Gmor0I3mw?t=217
https://go.discovery.com/tv-shows/building-off-the-grid-on-discovery/full-episodes/hawaii-dome-house

AUTOCLAVE is not used for the AirCrete OP is talking about. I would love to know if anyone has tried this. ICF with air-crete inside.

Mass in a house is a good thing...

Concrete adds weight to a floor but also adds structure. Like bridges are made of concrete...not air-crete or asphalt.

Yes, interior thermal mass is a very good thing... ICF needs a concrete core to satisfy structural requirements. An ICF concrete core can also transform what would be R22ish wall into a R60ish wall because of thermal mass effect in some diurnal temperature climate locations. If you really want a foam wall, just do SIPs...and hope the adhesive doesn't fail over time because of moisture issues or whatever. And this post is over 6 years old...and was ridiculous from the start...