Question: What is the white powder that is appearing on some areas of the concrete floor and walls?
Answer: The white powder is caused by salts in the concrete mix that are carried to the surface with evaporation of moisture during the curing process. This will leave a salt deposit, which easily can be brushed off. The appearance of the white powder does not affect the strength or performance of the concrete and should cease to form after the concrete has totally cured.

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