During the Fall months, we are replacing sidewalks around the property. The photos below are of a section of sidewalk that was getting pretty bad. We are replacing sections as we go, and doing the worst ones first. We have tried some repairs in certain areas, but they are short lived. So, we cut up the old sections and replace them. Some sidewalks here do not have any mesh or re-bar, and some are less than a few inches thick. We are also inserting pins along the edge when we mate up old and new sections to add rigidity.
Once again, we are fortunate to have maintenance guys capable of doing many things; we save a lot of money as compared to hiring contractors to do this stuff.