Concrete Slab Floor made 100% in Substance Designer and rendered in Marmoset Toolbag 3.
The reference pictures I took (getting strange looks from my partner) we're from a car park building near my workplace - the car park concrete had a lot of the details I wanted, though the end result is a bit tweaked as the environment location is not a car park.
Can be modified to remove the sealing and change the tiling to have multiple location uses.
Bricks in the wide shot are from a previous upload, found here: https://www.artstation.com/artwork/aRLxl2