5. Apparatus
5.1 Compression Device—The compression device may be
a platform weighing scale equipped with a screw-jack-
activated load yoke, a hydraulic loading device, or any other
compression device with sufficient capacity and control to
provide the rate of loading prescribed in 7.1. For soil with an
unconfined compressive strength of less than 100 kPa (1.0
ton/ft
2
) the compression device shall be capable of measuring
the compressive stress to within 1 kPa (0.01 ton/ft
2
). For soil
with an unconfined compressive strength of 100 kPa (1.0
ton/ft
2
) or greater, the compression device shall be capable of
measuring the compressive stress to the nearest 5 kPa (0.05
ton/ft
2
).
5.2 Sample Extruder, capable of extruding the soil core
from the sampling tube in the same direction of travel in which
the sample entered the tube, at a uniform rate, and with
negligible disturbance of the sample. Conditions at the time of
sample removal may dictate the direction of removal, but the
principal concern is to keep the degree of disturbance negli-
gible.
5.3 Deformation Indicator—The deformation indicator
shall be a dial indicator graduated to 0.03 mm (0.001 in.) or
better and having a travel range of at least 20 % of the length
of the test specimen, or some other measuring device, such as
an electronic deformation measuring device, meeting these
requirements.
5.4 Dial Comparator, or other suitable device, for measur-
ing the physical dimensions of the specimen to within 0.1 % of
the measured dimension.
N
OTE
4—Vernier calipers are not recommended for soft specimens,
which will deform as the calipers are set on the specimen.
5.5 Timer—A timing device indicating the elapsed testing
time to the nearest second shall be used for establishing the rate
of strain application prescribed in 7.1.
5.6 Balance—The balance used to weigh specimens shall
determine the mass of the specimen to within 0.1 % of its total
mass.
5.7 Equipment, as specified in Test Method D 2216.
5.8 Miscellaneous Apparatus, including specimen trimming
and carving tools, remolding apparatus, remove the water
content cans, and data sheets, as required.
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