Hypertufa Pagoda Project - Molding Cement
Hypertufa Cement Mix - Zen Garden Pagoda Project
3.5 part portland cement
2 part kids play sand
1 part vermiculite
4 part peat moss
1-2 cup acrylic binding agent
These are the rough proportions for our Hypertufa mix, your mileage may very. Just be sure to use the same measuring container.
Obviously we added water too, though we didn't measure the proportions. We mixed in water until the consistency would form a solid ball.