‘Artfloorescence’ – There Is Beauty In Destruction These pics are from a project I tested a few years back. It was an old abandoned Costco down in Southern CA. About 100k sq. ft. worth. Efflorescence, which means to ‘flower out’ in French, is when soluble compounds from either topical moisture, the concrete itself, or the soil below, to migrate up to the surface through evaporation. It is often assumed that these chemicals are alkaline, but not always. These formations were a result of ‘normal’ areas of development that were being exposed to additional water from interior flooding due to some roof leaks, then re-drying to form what you see in the pics. When these crystals form, it usually results in surface damage. Effervescence, a term that is sometimes used incorrectly to describe this issue, actually means ‘bubbles in a liquid, fizz’. Clearly if your concrete is fizzing, you have other issues… 🙂 Just trying to help. Have a great day.