Bought some concrete last week and the bags are much harder than I would have expect. Have they gone bad?
I would be bringing them back to HD and get a couple new bags. That concrete should not be that hard and I have never seen a bag that bad. When picking out new bags, drop them gently on the corners to see if the corners collapse, meaning that the concrete inside is soft. Be careful not to break open the bag. HD is really great about returns.