Burn scars can take place on your sidewalk, porch, or driveway if there was a fire or another incident that occurred nearby. Concrete might be challenging to clean, but it is possible to remove burn traces from the surface.
When washing concrete, it is important to avoid using any harsh chemicals, especially any cleaners that contain acid, as they can cause the concrete to deteriorate. Instead, choose more gentle cleaners like baking soda, dish soap, and water to get the job done.