FIELD: construction.
SUBSTANCE: in the method to purify concrete from ammonia based on using aqueous solution of organic acid and salt, which is applied onto the surface of the concrete item, organic acid is either formic acid or acetic acid or propionic acid; and salt is nitrite of either sodium or potassium or calcium, besides, the quantity of organic acid and salt in the aqueous solution is selected as one mole of acid and one mole of salt per one mole of ammonia, and water content in the solution is from 10 to 90 wt %.
EFFECT: higher efficiency of concrete cleaning from ammonia.
4 cl
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