Concrete spall in industrial regions should be would becould very well be because of deicing salts and trapped moisture

https://beauybiy770.quillnesty.com/posts/rebar-corrosion-repair-neutralizing-chlorides-and-restoring-protection

Concrete spall in commercial locations could be brought on by deicing salts and trapped moisture. Proper cleanup, curing, and rebar medical care cut the risk of repeating spalls.