If your concrete is spalling, these are the repair options: patch the spalled area with a color matching compound. Have your concrete resurfaced with an overlay. Rip out and replace the entire slab.
How to Fix Concrete Spalling?
Spalling is the process where the surface of concrete starts to peel away, chip, or flake. It can happen for a variety of reasons, but most commonly it is the result of water damage.
When water seeps into the concrete, it starts to break down the structure from the inside out. This can happen slowly over time, or it can happen suddenly if there is a lot of water all at once (like from a flood).
Spalling can also be caused by chemical reactions, freezing and thawing, or physical damage (like from a heavy object hitting the concrete). There are a few different ways to fix concrete spalling, depending on the severity of the damage.
For minor damage, you can just sand down the surface to smooth it out. For more severe damage, you may need to patch the area with new concrete.
If the spalling is widespread, you may need to replace the entire concrete slab. To fix minor spalling, start by sanding down the surface with a coarse–grit sandpaper.
Sand in a circular motion until the surface is smooth. If there are any divots or craters, fill them in with a concrete patching compound. Let the patching compound dry for 24 hours,