Plywood Concrete Mixer
If you have a batch of concrete to mix but nothing to mix it in, try a 4- x 8-ft. sheet of 1/4- or 3/8-in. plywood. Place a few bricks or scraps of 2×4 under all four of the plywood corners to form a shallow, concave mixing tub. Clean the concrete off thoroughly, and when you’re finished, you can still use the plywood with the other side up. — John Gandolfo.
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