How can surface defects be corrected in finished concrete?

Surface defects in finished concrete can significantly affect both the aesthetic appeal and the durability of the slab. Correcting these defects requires a careful approach to ensure that the integrity of the concrete is maintained while improving its appearance and function.

Grinding, patching, or applying a surface overlay is a comprehensive method for addressing various surface defects. Grinding can effectively smooth out minor imperfections, such as trowel marks or small bumps, ensuring a more uniform finish. Patching is used for filling larger voids or cracks, restoring the surface to a level that enhances both function and appearance. Surface overlays provide a fresh finish that can cover up existing imperfections while also adding a protective layer, improving durability, and allowing for various decorative treatments.

The other options either would not effectively resolve surface defects or could exacerbate the problem, leading to further deterioration or new issues in the concrete's surface. Thus, using grinding, patching, or applying a surface overlay presents a viable solution to correct surface defects in finished concrete effectively.