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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

How should the thermometer be inserted into the concrete sample to ensure an accurate temperature reading?

To a depth of 2 to 3 inches from the bottom of the container

So that it is entirely submerged

To a depth of 3 inches

To the bottom of the container

2 / 10

What is the significance of the number following the designation C1064/C1064M in the standard?

C) It specifies the number of pages in the standard

A) It indicates the number of revisions

B) It indicates the year of last revision

D) It designates the section number

3 / 10

What type of bath is used for verifying the accuracy of temperature measuring devices?

B) Oil bath

D) Air bath

A) Water bath

C) Sand bath

4 / 10

What is the maximum allowable difference in readings between the reference and the test temperature measuring devices during verification?

C) 1.0 °C

D) 1.5 °C

A) 0.2 °C

B) 0.5 °C

5 / 10

Which committee is responsible for the ASTM C1064 standard?

A) Committee C09 on Cement

C) Committee C12 on Mortar and Grout

B) Committee C09 on Concrete and Concrete Aggregates

D) Committee C15 on Manufactured Masonry Units

6 / 10

How long should the temperature measuring device remain in the concrete to obtain a reading?

A) 1 minute

D) 15 minutes

B) 2-5 minutes

C) 10 minutes

7 / 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?

± 1.5 °F (± 0.8 °C)

± 1.0 °F (± 0.5 °C)

± 2.0 °F (± 1.0 °C)

± 0.5 °F (± 0.3 °C)

8 / 10

Within how many minutes should the temperature of freshly mixed concrete be measured after obtaining the sample?

B) 15 minutes

D) 60 minutes

C) 5 minutes

A) 30 minutes

9 / 10

According to ASTM C1064, what should be done if the temperature measuring device fails verification?

C) Use the device for another purpose

B) Adjust and reverify the device

D) Send the device for manufacturer recalibration

A) Discard the device

10 / 10

What is the minimum required size of the concrete sample for temperature measurement according to ASTM C1064/C1064M?

2 cubic foot

0.5 cubic foot

1 cubic foot

1 Cubic Yard

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