ASTM C1064 - Temperature of Freshly Mixed Hydraulic-Cement Concrete
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Temperature Measuring Device (TMD) Requirements
The thermometer in use must adhere to the following requirements:
- Measure to within +/- 1 degree Fahrenheit
- Measuring device must read between 30 to 120 degrees
- Have 3-inches concrete cover in all directions
- Be inserted a minimum of 3-inches
- Be left in concrete a minimum of 2 min., maximum of 5 min.
- Be calibrated annually, or if there’s a question of accuracy
- Not vary by more than 1 degree Fahrenheit when verified against a reference thermometer