At my church, there is an old set of stairs made of concrete. They've begun to crumble on the top to the point where the treads are no longer flat and smooth.
I've not seen any material that has fallen off of the stairs so I can't tell you if it's flaking or crumbling off. (And I'm not sure if it makes a difference or if there is a difference.)
Is it possible to patch these concrete stairs or would the new concrete not bond well to the old? If so, can I just use some 2x10s and quickrete?
Up to this point, I've just ignored it since it would be far worse to have a giant chunk of concrete fall off (from a bad patch) than to leave it as is.