My original bricks (with twice the concrete\foam ratio) cured inside for a week and then sat in the oven at 190 for nine hours. One turned out nicely, but I have not done more than put it somewhere safe and quickly see that it does not seem crumbly:
I do not know why this one came out bubbly, but trying to smooth it made it worse!
For some reason, they formed two layers. The crumbly one had a fair amount of water, seemingly between the layers.
I will crop these pictures when I get home, but I appreciate they automatically resize now!
I showed Mom one of the Dome Gaia Gaia Domes and she asked if they were building those in Puerto Rico.