Yeah love the flying concrete guy.
Thought about doing some lightweight concrete after seeing his stuff years ago.
Then I priced vermiculite. Not cheap. Plus all the rebar and wire mess are kind of a turn off.
Have been making a hoop house with walls of woodchips (2 5gal buckets of woodchips, .5 of a 5gal
bucket of (wet) pulped paper and a 2 shovel fulls of cement and 3 of lime and about .5 5gal bucket of
water).
Sets up very nice and the woodchips are not only free they deliver them for free. Can't get much cheaper than that.
Here's a vid a buddy did of the build