I was trying to mount something to a concrete wall and completely botched it. I had 4 drop-in anchors, so I took a hammer drill and some bits that were, by eye, pretty close to the diameter of the anchor, and made some holes for it.
Well eyeballing it turned out to be a HUGE mistake, the hole diameters were just slightly too small and
it cause the anchors to leak their lead (which, as I understand, is supposed to get pushed out by pressure to fill the irregularities in the concrete) into their own threaded screw holes. edit: actually that was just the inside of the anchors that didn't get pushed down far enough by the installation tool.
Now I've got 4 anchors stuck in the wall (one of them is still poking out a bit) that can't be removed, and the concrete has also become pitted from the attempts to insert them.
1) How do I fix this? I'm thinking of using a metal saw to take off the parts of the anchors that are poking out past the wall face, then spackling over or something. Seems simple enough but right now I don't trust my own judgement and want a second opinion.
2) How do I finish this? I was thinking of trying again a few inches further up, but the mounting is gonna have to support maybe up to 500lbs and I'm worried about the damage I may have done to the concrete below.
The anchors are 3/8" diameter and about 1" long.
edit: here's a pic of the damage
Those black pen marks are where I want to try again. It might be better to try again to the left but the concrete is thinner. I don't know if that matters. Any advice would be appreciated.