Standard Method of Test for
Temperature of Freshly Mixed Hydraulic· Cement Concrete
AASHTO Designation: T 309M/T 309-06
ASTM Designation: C 1064/C 1064M·05
1.The values stated in SI units are to be regarded as the standard.
2.All references to ASTM standards contained in ASTM C 1064/C 1064M-05, listed in the following table, shall be replaced with the corresponding AASHTO standard.
C 172 T 141
3.Replace Sections 4.2 and 4.4 of ASTM C 1064/C 1064M-05 with the following:
4.2 Temperature Measuring Device-The temperature measuring device shall be capable of measuring the temperature of the freshly mixed concrete to ±0.5°C (±1°F) throughout the entire temperature range likely to be encountered in the fresh concrete.
Liquid-in-glass thermometers having a range of -18 to 49°C (0 to 120°F) are satisfactory.
Other thermometers of the required accuracy, including the metal immersion type, are acceptable.
4.4 Reference Temperature Measuring Device-The reference temperature measuring device shall be a liquid-in-glass thermometer readable to 0.2°C (0.5°F) that
has been verified and calibrated. The calibration certificate or report indicating conformance to the requirements of ASTM E 77 shall be available for inspection.
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