Vinegar can be used to clean concrete. A simple mixture of warm water and white vinegar is enough to clean everyday dirt from concrete. Mix equal parts warm water and vinegar together and apply to the concrete. Allow the solution to sit for several minutes before wiping down and rinsing.
Undiluted vinegar can be used to remove tougher stains and dirt on concrete. Spray the soiled area with undiluted white vinegar and then allow it to sit for a few minutes. Scrub the area with a stiff brush to break up any stains. Rinse the concrete with warm, clean water.