Usual story I'm afraid.
3" fence posts sunk directly into concrete. Rotted to the point of breaking at ground-level; the material under the broken post is (predictably: as per sods-law) pretty solid. Had a go at excavating the remaining post material with chisel/crowbar and mallet... no chance. Remaining option is to do it properly and completely break the concrete away and re-sink the posts with either Metpost and/or concrete.
The concrete is an "isolated lump" sunk into soil surround. It's stood the test of time so one assumes it was of adequate size and suitably anchored on a hardcore base.
Anyway, basically I'm just asking the pros here who've done this a million times before for their thoughts and for any tips on removing this sort of concrete. Should I just dig the surrounding soil away for the concrete and slug it out with the hammer and chisel?
My tools are club hammer, a variety of masonry chisels, and a fairly light-headed (2-3KG at a guess) but long-handled "sledge-hammer" that can deliver a fair clout.
Ideas and tips appreciated. Tips on how to break concrete in general welcomed.