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Mar 13, 2018 at 18:22 comment added user55119 If you use NaCl on concrete, you will have a water softener where you don't want it. It is one thing to remove calcium from hard water but quite enough to remove calcium from concrete.
Nov 28, 2016 at 18:23 history edited orthocresol CC BY-SA 3.0
added 12 characters in body
Oct 10, 2013 at 12:00 history answered bobthechemist CC BY-SA 3.0