The sample of concrete used for temperature determination must be rodded how many times?

The correct number of times to rod the sample of concrete used for temperature determination is ten. Rodding is a technique used to ensure proper consolidation of the concrete mix within the measuring container, which allows for an accurate representation of the mix's consistency and temperature.

By rodding the sample ten times, it helps eliminate air pockets and achieves a uniform density. This procedure is crucial because it directly influences the accuracy of the temperature readings, ensuring that they reflect the true state of the concrete mix. Accurate temperature measurement is essential for assessing workability and the overall condition of the concrete, impacting factors such as curing and setting times.

Rodding too few times may not adequately consolidate the sample, while rodding too many times could influence the concrete's properties adversely, leading to inaccurate results. Hence, ten roddings strike a balance between achieving a well-consolidated sample and preserving the integrity of the concrete mix's properties for temperature assessment.