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ACI Concrete Field Testing Technician - Grade I Terms in this set (68) The end of the temperature sensing portion of the temperature measuring device is submerged a minimum of __mm [__in.] into the freshly mixed concrete. 77mm /3in. The temperatur€6,68
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ACI Concrete Field Testing Technician - Grade I Terms in this set (68) The end of the temperature sensing portion of the temperature measuring device is submerged a minimum of __mm [__in.] into the freshly mixed concrete. 77mm /3in. The temperatur
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ACI Concrete Field Testing Technician - Grade I
Terms in this set (68)
The end of the temperature sensing portion of the temperature measuring device is submerged a minimum of __mm [__in.] into the freshly mixed concrete. 77mm /3in.
The temperature measuring device shall be capable...
ACI Concrete Field Testing Technician - Grade I
Jeremiah
Terms in this set (68)
The end of the temperature sensing portion 77mm /3in.
of the temperature measuring device is
submerged a minimum of __mm [__in.] into the
freshly mixed concrete.
The temperature measuring device shall be 0.5 C / +-1F / 0-50 Decrees C
capable of accurately measuring the
temperature of freshly mixed concrete to +-
__C [+__F] throught a range of __.
The temp. measuring device shall be verified Annually / accuracy
__, or whenever there is a question of __.
The temp of concrete may be measured in a True
wheelbarrow? T/F
The temp. of concrete may be measured in a True
wall form. T/F
A composite sample of concrete is required False
even if the only purpose for obtaining the
sample is to determine temp. T/F
What must be done to the sample container It must be dampened with water
prior to sampling the concrete
What must be done to the concrete Gently press the concrete at the surface around the measuring device.
surrounding the temp measuring device after
the device is submerged in the fresh
concrete?
How long must the temperature measuring At least 2 min., no longer than 5 min.
device remain in the freshly mixed concrete?
After the temperature of the concrete is Reporting of temp.
read, what is then required?
The temp. of concrete is reported to the 1 degree F
nearest __.
ACI Concrete Field Testing Technician - Grade I
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, 9/4/24, 5:51 PM
According to ASTM C1064, what is one to verify conformance to a specific requirement.
reason to take the temperature of concrete?
A max. temp. of freshly mixed concrete is False
specified in ASTM C1064. T/F
The sample of concrete used for False
temperature determination must be rodded
25 times.
Sampling by this method covers procedures Compliance
or obtaining representative samples, on
which test are to be performed to
determined __ with quality requirements of
the specifications under which the concrete
is furnished.
This method covers sampling from four Stationary mixers / Paving mixers / revolving drum mixers / open top mixers
types of mixers, which are __, __, __, and __.
The elapsed time between obtaining the first 15 min.
and final portions of a composite sample
shall not exceed __ min.
Portions of a composite sample shall be True
thoroughly mixed before beginning test on
the sample. T/F
Start tests for slump, temp, and air content 5 min.
within __ min. after obtaining the final portion
of the composite sample.
start molding specimens fr strength tests 15 min.
within __ after fabrication the composite
sample.
The concrete sample must be protected Rapid evaporation
from contamination and __.
The maximum size sample for making 1 foot cubed.
strength test specimens is __ ft cubed
When sampling from a STATIONARY mixer, 2
the batch must be sampled at __ or more
regularly spaced intervals during discharge
of the middle portion of the batch.
When sampling from a PAVING mixer, obtain 5
samples from at least __ different portions of
the pile and combine them into one
composite sample for test purposes
When sampling from a REVOLVING DRUM 2
TRUCK mixer, sample the concrete by
collecting __ or more portions taken at
regularly spaced intervals during discharge
of the middle portion of the batch.
Concrete samples from a truck mixer will be False
obtained before any water or admixtures are
added to the mixer at the job site. T/F
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