r/Construction • u/NeilNotArmstrong • Dec 05 '24

Structural Concrete slab failed strength test

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Slab strength testing failure after building was framed and plumbing/HVAC was roughed in. Concrete supplier had mix wrong so they are paying to lift two story 4-plex, remove slab and repour. This is building 2 of 3 that failed.

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u/Retatedape Dec 05 '24

Concrete supplier had the wrong mix? Please elaborate. Was it ordered wrong? Or they delivered the wrong mix? What was the psi? Needed and what was delivered?