Concrete @ your Fingertips
Full list of Nuggets
Removing dirt
Most dirt on concrete surfaces can be removed with plain water or with a soft brush and water containing a mild soap. If a stronger solution is required, use one part of hydrochloric acid with 19 parts of water.
In addition, steam cleaning or water jetting are generally effective methods of removing dirt.
Acknowledgement:
The Concrete Society
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Visual Concrete: Weathering, stains and efflorescence
