ACI Concrete Field Testing Technician Questions And Answers
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Course
ACI concrete strength technician
Institution
ACI Concrete Strength Technician
Specimens shall not be transported until _____ after final set.
~ 8h
Transportation time shall not exceed _____.
~ 4h
Standard Curing is the curing method used when test specimens are to be used
for _________.
~ Acceptance testing for specified strength, checking the adequacy of
mixt...
ACI Concrete Field Testing
Technician Questions And
Answers
The sensor of the temperature measuring device shall be submerged a minimum
of _____ in. [_____mm] into the freshly mixed concrete.
✓~ 3 in. [75 mm]
The temperature measuring device shall have a capacity of measuring
temperature of freshly mixed concrete to +- _____ degrees F [+- _____ C]
throughout a range of _____.
✓~ 1 degree F [0.5 C], 30 degrees F to 120 F [0 C to 50 C]
The temperature measuring device shall be calibrated _____, or whenever
there is a question of _____.
✓~ Annually, accuracy
The temperature of concrete may be measured in a wheelbarrow. True or False?
, ✓~ True
The temperature of concrete may be measured in a wall form. True of False
✓~ True
A composite sample of concrete is required even if the only purpose for
obtaining the sample is to determine temperature. True of False?
✓~ False
What must be done to the sample container prior to sampling the concrete?
✓~ Dampen (with water)
What must be done to the concrete surrounding the temperature measuring
device after the device is submerged in the fresh concrete.
✓~ Gently press the concrete around the temperature measuring device
at the surface of the concrete
How long must the temperature measuring device remain in the freshly mixed
concrete?
, ✓~ At least 2 minutes but not more than 5 minutes
After the temperature of the concrete is read, what is required?
✓~ Reporting of temperature
The temperature of concrete is reported to the nearest _____ degrees F
[_____ C]
✓~ 1 degree F [0.5 C]
According to ASTM C1064, what is one reason to take the temperature of
concrete?
✓~ Verify conformance to a specified requirement for temperature of
concrete
A maximum temperature of freshly mixed concrete is specified in ASTM C1064.
True of False?
✓~ False
, The sample of concrete used for temperature determination must be rodded 25
times. True or False?
✓~ False
Sampling by this method is required when tests are to be made to determine
_____ with specification requirements.
✓~ Compliance
This method covers sampling from four types of mixtures which are _____,
_____, _____, and _____.
✓~ Stationary mixers, paving mixers, revolving drum mixers, and open
top mixers
The maximum allowable time between obtaining the first and final portions of a
composite sample is _____ minutes.
✓~ 15
Portions of a composite sample shall be thoroughly remixed bfore beginning
tests on the sample. True of False?
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