Temperature Of Freshly Mixed Hydraulic Cement Concrete

Question 1

What is the Performance Checklist 7 steps

Answer 1

1. Obtain sample in a non-absorptive container that can provide 75 mm of cover
   2.Use a CSA Approved Thermometer accurate to 0.5 degrees through 0 to 50 degrees
2. Place thermometer in sample with min 75 mm cover
3. Gently press the concrete around the thermometer
4. Read the temperature after a minimum or 2 minutes
5. Complete the measurement within 5 minutes
6. Record temperature to nearest 0.5 degree

Question 2

The temperature measuring device shall be calibrated blank or blank

Answer 2

Annually / question of accuracy

Question 3

Calibration should be performed within the range of blank to blank two temperatures at least blank apart

Answer 3

0 / 50 / 15

Question 4

Temp of concrete can be taken in a wheelbarrow

Answer 4

True

Question 5

The temperature of concrete can be taken in concrete placed in a wall form

Answer 5

True

Question 6

If a 150 x 300 mm test cylinder mould is used as a container for measuring the temperature of concrete. What must be done to the container

Answer 6

The container must be dampened

Question 7

What must be done to the concrete surrounding the temperature measuring device after it is inserted into the fresh concrete

Answer 7

Must be gently pressed around the temperature measuring device

Question 8

How long must the temperature measure device remain in the freshly mix concrete for an accurate reading?

Answer 8

Two minutes or until stable

Question 9

What action must be taken after the temperature measuring device has remained in the freshly mix concrete for two minutes and the temperature reading has stabilized

Answer 9

Read and record the temperature wow the temperature measuring device remains in the concrete

Question 10

Complete the temperature measurement of freshly mixed concrete within blank immediately after blank the sample

Answer 10

5 min / obtaining

Question 11

The temperature of the concrete is recorded to the nearest blank

Answer 11

0.5 degree

Question 12

What is the purpose of measuring temperature of freshly mixed concrete?

Answer 12

To verify conformance

Question 13

What special procedures are required when measuring the temperature of concrete containing course aggregate particles that are greater than 80 mm

Answer 13

Ensure the temperature is stabilized before recording the reading