An exterior air-entrained paving mix arrives below the specified slump after a long haul. The driver offers to add water at the chute until the crew likes the look. Which response is appropriate?
Correct Answer
C) Follow the approved adjustment procedure, retest slump and air, and reject the load if it cannot meet specification
Water added outside the approved procedure can raise water-cement ratio and disturb air content; the load needs controlled adjustment and retesting or rejection. Other choices: visual judgment, untested water addition, and bucket cement changes are not quality-controlled concrete practice.
Why This Is the Correct Answer
Water added outside the approved procedure can raise water-cement ratio and disturb air content; the load needs controlled adjustment and retesting or rejection. Other choices: visual judgment, untested water addition, and bucket cement changes are not quality-controlled concrete practice.
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