Quote:
Originally Posted by der_wille_zur_macht
Curing in acid reduces the strength of the concrete. If you've got a structure where strength is already questionable (thin concrete, big weird aggregate, rock salt creating voids) it might be best to aim for the most strength possible, which would be curing damp, letting it air dry, then submersing in water until the pH stops rising (which will be a few weeks to several months depending on the thickness, water change frequency, etc.)
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Good points. And putting cement in some acids makes it turn yellow also. Although I would have only used a weak vinegar solution.
After letting it air dry I'll put it in salt water and check on pH.