Which data should be recorded as field test data for transit concrete?

Which data should be recorded as field test data for transit concrete?

• A. Weather forecast
• B. Batch weight correction factor
• C. Delivered temperature and time in transit
• D. Color of concrete

Answer: (C)

When assessing transit concrete, the most important field data to record are the temperature of the concrete on delivery and the time it has spent in transit. Temperature history is crucial because it directly influences the rate of hydration, strength development, and workability. If concrete arrives too hot or too cold, its setting time and finishability change, potentially affecting placement windows and final performance. Time in transit matters because it combines with temperature to determine how much the concrete has already set or stiffened before placement, which can impact pumpability, consolidation, and cure timing. Other items don’t serve as direct field-test data for the concrete in transit. Weather forecast is planning information rather than a measurement taken from the concrete itself. Batch weight correction factor relates to batching accuracy and mix design adjustments rather than what is observed in the field. Color of the concrete is not a reliable indicator of its properties or performance in transit. So recording delivered temperature and time in transit provides the essential data to verify that the concrete can be placed and cured within the specified limits and will perform as intended.

When assessing transit concrete, the most important field data to record are the temperature of the concrete on delivery and the time it has spent in transit. Temperature history is crucial because it directly influences the rate of hydration, strength development, and workability. If concrete arrives too hot or too cold, its setting time and finishability change, potentially affecting placement windows and final performance. Time in transit matters because it combines with temperature to determine how much the concrete has already set or stiffened before placement, which can impact pumpability, consolidation, and cure timing.

Other items don’t serve as direct field-test data for the concrete in transit. Weather forecast is planning information rather than a measurement taken from the concrete itself. Batch weight correction factor relates to batching accuracy and mix design adjustments rather than what is observed in the field. Color of the concrete is not a reliable indicator of its properties or performance in transit.

So recording delivered temperature and time in transit provides the essential data to verify that the concrete can be placed and cured within the specified limits and will perform as intended.