Quote Originally Posted by Chubby View Post
One very good way of beefing things up is to get a supply of the TC bullets from the old APDS anti tank rounds. Use something of the sort to replace some of the aggregate in the concrete mix. Old broken drills, taps, dies, files etc are all old friends too.
Would corrosion of files, drills, taps etc that get thown in the mix cause eventual weakening of the concrete ?