D2726_19_10
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Only specimens that are known
to be thoroughly dry,
that is, laboratory-prepared dried specimens,
are to be tested in accordance with
10.2 of the written standard.
All others are assumed
to contain moisture or solvent,
and are to be tested in accordance
with 10.1 of the written standard.
The sequence of testing for
10.1 of the written standard is... in water.
Saturated surface dry... dry.
Laboratory-prepared dried specimens, include
dry-plant produced laboratory-compacted samples.
Mass of specimen in water.
Completely submerge the specimen in the
water bath at 25±1 degree Celsius,
77±1.8 degrees Fahrenheit,
for 3 to 5 minutes.
Then determine the mass
by weighing in water.
Designate this mass as "C."
If the temperature of the specimen
differs from the temperature of the water bath
by more than 2 degrees Celsius,
3.6 degrees Fahrenheit,
the specimen shall be immersed
in the water bath for 10 to 15 minutes,
instead of 3 to 5 minutes.
Mass of saturated
surface-dry specimen in air,
within 15 seconds of removing
the sample from the water bath.
Surface-dry the specimen by
blotting quickly with a damp cloth towel.
And, then, determine the mass
by weighing in air.
Designate this mass as, "B,"
Mass of Dry Specimens.
For cores and other specimens that are
not used for further resting and evaluations,
after determining the mass in water,
and in a saturated surface-dry condition,
thoroughly dry the specimen
to a constant mass at 110±5 degrees Celsius,
230±9 degrees Fahrenheit.
Allow the specimen to cool
and weigh in air.
Designate this mass as, "A."
Other methods, such as,
Practice D7227 and D7227M,
may be used to dry the specimen,
as long as a constant mass is achieved,
mass repeats within 0.1%.
Drying the specimen at the
required temperature of 110 degrees Celsius,
230 degrees Fahrenheit, will change
the characteristics and shape of the specimen.
This will make the specimen
unsuitable for further testing.
Drying the specimen at a reduced temperature,
such as 52 degrees Celsius,
125 degrees Fahrenheit,
in order to keep it intact, will not meet
the requirements of this test method.
For specimens used to conduct performance
or additional tests and in the absence
of drying procedure provided by
the specified test method, use the practice
D7227 and D7227M method
to dry the specimen.
Mass of dry specimen in air.
Determine the mass by weighing the specimen
after it has been standing in air,
at room temperature for at least one hour.
Designate this mass as, "A."
Use the same procedure as described
in 10.1.1 of the written standard.
Surface dry the specimen by
blotting quickly with a damp cloth towel.
And, then, determine the mass
by weighing in air.
Designate this mass as, "B."