John Rumm wrote -
......concrete will break much more easily if you can get a space
under it.

That is so true.

I had a concrete garden path that was about 3 inches thick. A
sledgehammer or pick just bounced off it unless you really got savage
with it, but then there seemed to be more prospect of damage occurring
to me rather than the path.

I then hit upon the idea of trying to lever up a section of it, using a
strong pole. Once you can prise the concrete away from the ground by
just an inch or two, it only needs a tap with a club hammer to break it
off into manageable bits. Seriously, it needed so little force to break
it that a child could have done it.

The only trick is to put something under the raised section so that it
stays off the ground when the lever is moved, otherwise you have to
keep lifting it again.

60 feet of paving was demolished in a part of an afternoon. The only
hard bit was barrowing it all away.

I could have done the whole job in the time it would have taken me to
drive to the hire shop and return their kit afterwards.