Geology Reference
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available for the specified index testing, then determine the final
water content,
w
f
, in accordance with ASTM Method D 2216
(Chapter 4) and dry mass of solids,
M
d
, using the entire specimen.
If the soil is heterogeneous or more material is required for the spec-
ified index testing, then determine the final water content,
w
f
, in
accordance with Method D 2216 using a small wedge-shaped section
of the specimen. The remaining undried material should be used for
the specified index testing.
Data collected in the consolidation test should include the following:
DATA
[A] Specimen Data
At beginning of test:
Diameter of specimen,
D
(in.)
Initial height of specimen,
H
0
(in.)
Mass of specimen ring plus specimen (g)
Mass of specimen ring (g)
At end of test:
Mass of entire wet specimen plus can (g)
Mass of entire dry specimen plus can (g)
Mass of can (g)
[B] Time-versus-Deformation Data
Successive readings of deformation dial, in inches, as a function of time,
in minutes. (As explained in the section “Procedure,” separate series of
time-versus-deformation data are obtained for a number of different
loadings at different applied pressures.)
CALCULATIONS
[A] Specimen Parameters
At beginning of test:
1.
Initial wet unit weight:
With the specimen's diameter (
D
) and initial
height (
H
0
) known, its initial volume (
V
0
) can be computed. The ini-
tial wet mass of the specimen (
M
T
0
) can be determined by subtract-
ing the mass of the specimen ring from the mass of the specimen
ring plus specimen; and with the initial wet mass and volume
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