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Concrete Strength acceptance Criteria

 Concrete strength acceptance Criteria for concrete structures As per ACI318

The compressive strength of 28 days is considered satisfactory if both conditios are met, 

1. No single strength test falls below the specified compressive strength by more than 500psi (32kg/cm2) for FCU>5000Psi (340kf/cm2)& or 0.1Fcu for FCU<5000psi(340kg) cm2) 

2.the average of every three consecutive strength test equal or exceeded the specified compressive strength.


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