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Page Title: Table 1. Standard Laboratory Test Procedures
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ERDC TN-DOER-N5
July 2000
Unified Soil Classification System classification.
Specific gravity.
Organic content.
Standard geotechnical laboratory test procedures, such as those of the American Society for Testing
and Materials (ASTM), should be used for each test. Table 1 gives the standard ASTM designation
for the needed tests; it also cross-references the ASTM procedures to those of several other
organizations that have standardized test methods. As discussed in the following paragraphs,
nonstandard laboratory testing must usually be used for shear strength, consolidation, and perme-
ability determinations in these very soft dredged materials.
Table 1
Standard Laboratory Test Procedures
Test Designation
1
2
3,4
COE
DoD
Comments
Soil
ASTM
AASHTO
Water content
D 2216
T265
I
Method 105, 2-VII
Grain size
D 422
T88
V
2-III, 2-V, 2-VI
Atterberg limits
D 4318
T89
III
Method 103,
T90
2-VIII
Classification
D 2487
III
Specific gravity
D 854
T100
IV
2-IV
Organic content
D 2974
Use Method C
Consolidation5
D 2435
T216
VIII
Permeability6
D 2434
T215
VII
Shear tests
D 2573
Field test
D 4648
Laboratory test
1
American Association of State Highway and Transportation Officials.
2
Headquarters, USACE (1986).
3
Department of Defense (1964).
4
Department of the Army (1987).
5
Do not use the ASTM laboratory test for determining consolidation. Instead, use the modified standard
consolidation test and the self-weight test (Headquarters, USACE, 1987; Cargill 1983; Poindexter 1987, 1988).
6
One value of pemeability must be calculated from the self-weight consolidation test.
Shear Strength Testing. Determination of the shear strength of very soft soils is extremely
difficult. Because of the soft conditions of the materials, they are difficult to sample, transport, and
test in an undisturbed condition. Many of these soils are too soft to stand under their own weight;
thus conventional triaxial testing, unconfined compression testing, and direct shear testing are
impossible or impractical to run. The most commonly used laboratory testing technique for very
soft sediments is the laboratory vane shear device. Although it does not always correlate directly
to field vane testing, it is much more economical and is used extensively in the marine sediment
industry. Because of its extensive use and the large volume of strength data it has generated, the
laboratory vane shear test is well accepted in the marine geotechnical engineering community.
5

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