Special diamond tips drills which will cut through concrete, steel at virtually any depth you want.
Robore Hire have a range of drill motors from 110v, 3 phase and air powered. We also have rock drills that attach to our robotic machines.
Both crunching and bursting is an extremely efficient method for removing concrete without vibration or water.
Using multiple burster heads you can achieve bursting power ratios up to 2000 tons.