Expansion in outdoor tiles
Concrete slab, though, will crack. And if such crack is under center of
tile(s)
I'd expect tile(s) to crack too, depending on the exact type and extent
of deformation.
For indoor spaces, over a cracked slab, a "membrane" is often used
between the two to keep the tiles from also cracking. This may also be
viable for outdoor spaces, you'll have to check.
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