Concrete repair is the process of fixing a hardened concrete surface that over time has lost the ability to hold the binding concrete materials together due to damage or environmental exposure. Concrete repair is appropriate for honey-comb, cracks, physical impacts, chipped out surfaces or surface scaling.There are various ways to repair a concrete surface, such as: formwork pre-pack pressure grouting, formwork gravity pour, carbon fiber strengthening, by trowel or patching applied.