Put on the safety goggles, a breathing mask, thick gloves, a long-sleeved shirt, pants and shoes with reinforced toes.
Place the bale on a tarp or concrete surface.
Saw the bale into thirds with the chainsaw. Set aside two-thirds of the bale.
Cut through the remaining third of the bale with the chainsaw to divide the pieces into 4- to 6-inch lengths.
Transfer the bale pieces to a wheel barrow by hand. Cut the straw as you transfer it to ensure every piece is 4- to 6-inches long.
Mist the straw lightly with a hose to keep the pieces from flying away.
Pour concrete powder into a concrete mixer or wheel barrel.
Add straw gradually to the mix as you make concrete. Stir and incorporate one-third of the bale of chopped straw in to the mixture for every cubic yard of concrete mix.
Use a cup or bucket to add water in small amounts. Add just enough water to keep the concrete mixture pourable; too much water can weaken the concrete mixture.
