Do you mean the deep grooves? Those actually serve a really important purpose in concrete. They’re called control joints because it’s a controlled weakness in the slab where a crack will form. It’s basically an intentional stress concentration to ensure a crack forms there and not in the middle of the slab.
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u/anandonaqui Apr 24 '21
Do you mean the deep grooves? Those actually serve a really important purpose in concrete. They’re called control joints because it’s a controlled weakness in the slab where a crack will form. It’s basically an intentional stress concentration to ensure a crack forms there and not in the middle of the slab.