According to Test Method C1064, what is one reason to take the concrete temperature?

• A. To measure slump.
• B. Verify conformance to a specified requirement for concrete temperature.
• C. To identify the mix design.
• D. To determine air content.

Answer: (B)

Measuring the temperature of freshly mixed concrete is a control step to ensure the batch meets the project’s specified temperature range. This matters because concrete temperature affects the rate of hydration, early strength development, and the potential for thermal cracking if the temperature is too high or too low. By following Test Method C1064, you obtain an accurate temperature reading so you can verify that the concrete conforms to the specified temperature requirement. Slump, mix design identification, and air content are determined by other tests (for workability, design records, and air-void content, respectively), not by temperature measurement.