C1064/C1064M – 17—Temperature of Freshly Mixed Hydraulic-Cement Concrete
This test method covers the determination of temperature of freshly mixed hydraulic-cement concrete.
1 / 10
At what maximum time interval after obtaining the sample should the temperature of the concrete be measured?
2 / 10
How often should the accuracy of the temperature measuring device be verified?
The accuracy of each temperature measuring device used for determining the temperature of freshly mixed concrete should be verified at least annually.
3 / 10
According to ASTM C1064, what should be done if the temperature measuring device fails verification?
If the temperature measuring device fails verification, it may be adjusted and then reverified to check if it then meets the required accuracy.
4 / 10
How should the thermometer be inserted into the concrete sample to ensure an accurate temperature reading?
5 / 10
What is the minimum immersion depth for the temperature measuring device in the concrete?
The end of the temperature sensing portion of the device must be submerged a minimum of 75 mm into the freshly mixed concrete to ensure an accurate measurement.
6 / 10
According to ASTM C1064/C1064M, the temperature measuring device must be capable of accurately measuring the temperature of fresh concrete to within what range?
7 / 10
What should be done after placing the temperature measuring device in the freshly mixed concrete?
After positioning the temperature measuring device, gently press the concrete around the device at the surface to prevent ambient air temperature from affecting the reading.
8 / 10
What type of bath is used for verifying the accuracy of temperature measuring devices?
Verification of the accuracy of the temperature measuring devices may be made in oil or other suitable bath liquids having uniform density.
9 / 10
What is the reported accuracy of the reference temperature measuring device?
The reference temperature measuring device must be readable and accurate to ±0.2 °C at the verification points.
10 / 10
After inserting the temperature measuring device into the fresh concrete, what should be done with the surrounding concrete?
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The average score is 67%
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