@Doc I would say no. I don't have experience with magnesium cement. Further, adding aggregate will collapse the mix. So I thinking refractory air cement is not possible unless you make it with lye and aluminum powder, but then it's not aircrete and doesn't require the little dragon.

However, after the structure is up you could paste on lava stone or actual refractory cement. If fire is the primary design consideration then perhaps an underground structure is the better option or tall earth berms. You could also engineer a battery, pump, water tank sized to burn times and BTU exposure and spray cool it.. Live in field..

I suspect that are aircrete would actually survive a fire but even if it didn't the whole point of all this is cheap housing right?

Now I'm rambling...

@ignachos Totally agree with you. I loved the idea too. Then I did it a few times.. Great job for indoors with hired help LOL

Try it! Make something. I'm not trying to discourage.

I have a cost an material estimator setup you are welcome to use. Just select your numbers in the green fields and it will show you the cost as well as the amount of materials to order.

Estimate Dome Cost Calculator

In some locations, you can build a "storage shed" as long as its under a certain size and has not been plumbed in when its inspected.

Yes I build these domes. As well as manage workshops. You can find me at TinyGiantLife.biz

I preformed crush test on aircrete. It's compresive strength exceeds frame construction. A dome also does not catch wind and therefore is not harmes by hurricane winds.

My test stopped at three weeks when my scale was no longer able to measure the weight.

3 weeks holding 250 pounds per square inch.

R value is not the entire story.. link text

I will soon have the engineering values that allow design. The U value which allows proper heat load calculation.

Find me at TinyGiantLife.biz

Add some glycerin.

It's more like sidestepping the code. Cellular concrete is in the building code and legal. However, when you make your own blocks it's doesn't apply. You could buy a pallet of the real thing and get code approval then use your own product...

It works, but you have to buy or find and process all that foam into tiny pieces.

I looked into EPS personally just want to avoid the plastic.