Step 1.4. Hypertufa
Hypertufa (in a sense) is a lightweight concrete.
Okay! Having read stories about other people's less than perfect hypertufa attempts resulting in cracked and crumbling end results, I decided to take the above advice very seriously.
My hypertufa mix
● 3 buckets of peat moss
● 2 buckets of perlite
● 2 buckets of cement
● 2 plus buckets of water (more or less)
The peat moss and the perlite was bought from a garden center and the cement from a building supply store.
Some safety stuff: Breathing in any of the above ingredients (except the water) is not good for your health. Wear a mask, goggles, gloves, and appropriate clothing. The ingredients are very light and any wind or mixing disturbance will cause the dust particles to float through the air.
The above dry ingredients were poured (carefully) into a wheelbarrow and mixed together with a spade.
Then the water was poured in slowly - about 1/2 of a bucket at a time - and the mixing continued.
It was mixed with the spade from underneath and folded over. Mixing and adding water continued until the mix was a uniform consistency: wet enough without puddling and able to be spread without crumbling.
Tip: A smaller spade or shovel is easier to work with than a bigger one.