ACI Field Testing I Practice Questions - ACI Concrete Field Testing Technician Grade I Exam

According to ASTM C172, how many portions must be taken to form a composite sample from a stationary mixer?

At least 2 regularly spaced portions At least 3 regularly spaced portions, but not from the very start or very end of the discharge Exactly 5 portions A single portion from the middle of the load

Correct Answer:

At least 3 regularly spaced portions, but not from the very start or very end of the discharge

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