How do you repair a damaged joint arris?

The 'arris' is the sharp edge of a concrete joint. Heavy traffic often breaks these edges (spalling). To repair them, we saw-cut the concrete to create a clean, vertical edge, removing the damaged section. We then rebuild the arris using a high-strength epoxy mortar that cures harder than concrete. This restores a smooth transition for wheels and prevents the joint sealant from failing due to edge collapse.