that we have been busting through concrete where I over poured. We taped the joints, but that concrete comes out of the pump truck with such high velocity that I over filled a little in two places. A piece of advice to anyone doing this is to avoid over filling the forms if at all possible. I think we fixed it, but it was a pain. You can see my wife working on the overfilled joint. I needed a break to take the picture before it got too dark.