ACI CLTT-2 Practice Questions - ACI Concrete Laboratory Testing Technician - Level 2 Exam

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Per ASTM C192/C192M, after a 0.028 m³ (1 ft³) drum batch is mixed, what is the minimum allowed mixing time after all ingredients are in the mixer?

1 minute mixing, 2 minutes rest, 1 minute remix 3 minutes mixing, 3 minutes rest, 2 minutes remix 5 minutes mixing then immediate discharge 10 minutes mixing then 5 minutes rest

Correct Answer:

3 minutes mixing, 3 minutes rest, 2 minutes remix

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