Our second project to make use of the minimum-amount concrete delivery was to try a prototype of the curbs which will be used to cap our rock column supports and walls. We constructed the re-usable form from smooth faced plywood, all screwed and clamped together. The experiment worked well, but next time we'll vibrate the concrete to eliminate the pock marks and maybe include some fiber reinforcement to provide a bit of strength when moving the completed (very heavy) curbs from the mold to the wall tops.
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