Section 2: Temperature of Fresh Concrete

The stem of the thermometer is submerged a minimum of ….. into the freshly mixed concrete.

3 inches

The thermometer shall be capable of accurately measuring the temperature of freshly mixed concrete to ….. throughout a range of …..

1 deg-F throughout the range of 30 deg-F to 120 deg-F

The thermometer shall be verified within …..

At least one year of its current use

True or False: The temperature of concrete may be measured in a wheelbarrow.

True

True or False: The temperature of concrete may be measured in a wall form.

True

True or False: A composite sample of concrete is required even if the only purpose for obtaining the sample is to determine the temperature.

False

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

Dampened (with water)

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

Push concrete around the thermometer to ensure the concrete is in full contact with the thermometer.

How long must the thermometer remain in the freshly mixed concrete?

For 2-5 minutes

After the temperature of the concrete is read, what is then required?

Record the temperature.

The temperature of the concrete is recorded to the nearest …..

1 deg-F

True or False: There is a specified maximum temperature of freshly mixed concrete.

False

The sample of concrete used for temperature determination must be rodded 25 times.

False