Concrete – How to pond concrete

Unbelievable good math for a block wall, but I think Jim is only going to have one block on the ground at the top of the pond. The liner itself is very strong, and once laid up and over the block, that block is not going anywhere. Not only would 6 inches of water have to move the block, but stretch the liner the same distance as moving the block. The most i would do is drive a few 3 foot rebar rods in the holes of the blocks and fill the holes with dirt or concrete. We have build 100 foot by 150 foot, 8 inch deep deep skating rinks out of standard concrete blocks with absolutely no extra support, just a little backfill behind the block, laid in the liner, the fire dept filled it up and nothing moved.

Actually, what you want to do is a three step process. You first need to pour the concrete into the forms and screed it. The second step is to float it and bring some of the butter out. The third step is to stamp the partially dried concrete. The stamping can go pretty quick if you had two molds set up on a tamp or step board that can be tapped with a mallet. The working time can vary, temp, humidity etc, but you usually have an hour or two to do what you need to do. Ask the concrete company to give you a longer cure mix, just a bit wetter