Are things that look like gum on top of or embedded in concrete actual chewing gum or are they ever building materials?
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@shortstories - I think those gummy materials are meant to keep water out of the cracks... 🤔 in an effort to forestall for a while, the freeze/thaw cycle that breaks up concrete.
I have no real concrete experience, but I once read about a similar material used on Mt. Rushmore, for the same purpose.
