Test Method C1064: Temp of Freshly Mixed Hydraulic Cement Concrete

Question 1

The sensor of the temperature measuring device shall be submerged a minimum of ___ inches into the freshly mixed concrete.

Answer 1

3 in.

Question 2

The temp measuring device shall have a capacity of measuring temp or freshly mixed concrete to ___ degree F. It ranges from ___ to ___ degrees F.

Answer 2

1 degree F.

30 - 120 degrees F

Question 3

The temp measuring device shall be calibrated ______, or whenever there is a question of _____.

Answer 3

annually, accuracy

Question 4

The temp of concrete may be measured in a wheelbarrow. T/F

Answer 4

True

Question 5

The temp of concrete may be measured in a wall form. T/F

Answer 5

True

Question 6

A composite sample of concrete is required even if the only purpose for obtaining the sample is to determine temperature. T/F

Answer 6

False

Question 7

What must be done to the sample container prior to sampling the concrete?

Answer 7

Dampen (with water)

Question 8

What must be done to the concrete surrounding the temp measuring device after the device is submerged in the fresh concrete?

Answer 8

Gently press the concrete around the temperature measuring device at the surface of the concrete.

Question 9

How long must the temperature measuring device remain in the freshly mixed concrete?

Answer 9

At least 2 minutes, but no more than 5.

Question 10

After the temp of the concrete is read, what is required?

Answer 10

Reporting of temperature

Question 11

The temp of concrete is reported to the nearest ___ degrees F.

Answer 11

1 degree

Question 12

According to ASTM C1064, what is one reason to take the temperature of concrete?

Answer 12

Verify conformance to a specified requirement for temperature of concrete.

Question 13

A maximum temp of freshly mixed concrete is specified in ASTM C1064. T/F

Answer 13

False

Question 14

The sample of concrete used for temp determination must be rodded 25 times. T/F

Answer 14

False