How to clean lime stains on pavement ?
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They have tons of concreat cleaners in the stores... not many work... dont laugh, but I bought a cheap toilet bowl cleaner (Dont buy the blue kind i could stain concrete) It worked Great... took out all the rust stains from my sprinklers too,
Try using a pressure washer on it. You'd be suprised how powerful those machines are. Most cities have places that rent them by the hour or by the day.
Lime deposits are akaline, and an acid is the natural opposite. Many concrete cleaning solutions contain muriatic acid, though naturalhandyman.com recommends muriatic acid only as a last resort. They recommend phosphoric acid instead. In either case, if you choose to use a strong acid, you need to recognize that they are very dangerous substances--potential for harm comes not just from direct contact, but from breathing the fumes. On the other hand, it's precisely because they are so volatile (chemically unstable) that they do what they do. They quickly combine with other substances and neutralize themselves. It's not as if they leave permanent or even long-lived harmful residues. Anyone using strong acids should take a little time to educate themselves on the properties of these chemicals and learn how to use appropriate precautions.
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