How can the inspector assess whether there is adequate slump for a hand finishing operation after discharge?

How can the inspector assess whether there is adequate slump for a hand finishing operation after discharge?

• A. Compare the measured slump to project requirements and adjust finishing approach; request re-tempering if permitted by contract
• B. Ignore slump and proceed
• C. Only use visual assessment
• D. Delay finishing until specified time

Answer: (A)

The key idea is that hand finishing quality depends on the concrete’s workability at the moment of finishing. After discharge, you need to verify the slump against project requirements to know whether the concrete has the right consistency for finishing. If the measured slump matches the spec, you can proceed with the planned finishing method. If it doesn’t, the best course is to adjust how you finish to accommodate the actual workability, and, if the contract allows, request re-tempering to bring the slump into the required range. This ensures you can finish properly without defects caused by too stiff or too fluid concrete, while respecting any contract limits on adding water or admixtures. Relying on visual judgment alone is not reliable, delaying finishing won’t fix the underlying workability issue, and ignoring the slump can lead to poor surface quality or segregation.

The key idea is that hand finishing quality depends on the concrete’s workability at the moment of finishing. After discharge, you need to verify the slump against project requirements to know whether the concrete has the right consistency for finishing. If the measured slump matches the spec, you can proceed with the planned finishing method. If it doesn’t, the best course is to adjust how you finish to accommodate the actual workability, and, if the contract allows, request re-tempering to bring the slump into the required range. This ensures you can finish properly without defects caused by too stiff or too fluid concrete, while respecting any contract limits on adding water or admixtures. Relying on visual judgment alone is not reliable, delaying finishing won’t fix the underlying workability issue, and ignoring the slump can lead to poor surface quality or segregation.