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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

What should be done after placing the temperature measuring device in the freshly mixed concrete?

C) Add more concrete to the container

D) Stir the concrete around the device

A) Press down on the device to submerge it deeper

B) Gently press the concrete around the device at the surface to close the void

2 / 10

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

B) Adjust and reverify the device

D) Send the device for manufacturer recalibration

A) Discard the device

C) Use the device for another purpose

3 / 10

Which committee is responsible for the ASTM C1064 standard?

D) Committee C15 on Manufactured Masonry Units

C) Committee C12 on Mortar and Grout

B) Committee C09 on Concrete and Concrete Aggregates

A) Committee C09 on Cement

4 / 10

What is the primary purpose of ASTM C1064?

A) To determine the chemical composition of concrete

B) To measure the temperature of freshly mixed hydraulic-cement concrete

D) To evaluate the tensile strength of concrete

C) To assess the drying time of concrete

5 / 10

What is the minimum period that the thermometer should be left in the concrete to ensure a stable reading?

5 minutes

10 minutes

1 minutes

2 minutes

6 / 10

How often should the accuracy of the temperature measuring device be verified?

B) Quarterly

C) Annually

D) Every two years

A) Monthly

7 / 10

What is the reported accuracy of the reference temperature measuring device?

B) ±0.2 °C

A) ±0.1 °C

C) ±0.5 °C

D) ±1.0 °C

8 / 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

To a depth of 3 inches

To the bottom of the container

So that it is entirely submerged

9 / 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?

± 0.5 °F (± 0.3 °C)

± 1.5 °F (± 0.8 °C)

± 1.0 °F (± 0.5 °C)

± 2.0 °F (± 1.0 °C)

10 / 10

What should be done to the sample container before sampling freshly mixed concrete?

C) It should be dampened with water

B) It should be heated

A) It should be coated with a non-stick spray

D) It should be lined with plastic

Your score is

The average score is 59%