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Lab Services: Soil testing

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Test Method Title

Standard Method of Test for Unconsolidated, Undrained Compressive Strength of Cohesive Soils in Triaxial Compression

Reference Number

AASHTO T 296

Material

Soil

Test Property

Undrained Strength

Description of Test

This test method covers determination of the strength and stress-strain relationships of a cylindrical specimen of either undisturbed or remolded cohesive soil. Specimens are subjected to a confining fluid pressure in a triaxial chamber. No drainage of the specimen is permitted during the test. The specimen is sheared in compression without drainage at a constant rate of axial deformation (strain controlled). This test method provides data for determining undrained strength properties and stress-strain relations for soils. This test method provides for the measurement of the total stresses applied to the specimen, that is, the stresses are not corrected for pore-water pressures.

Preferred Test Sample Size

2.87 in diameter x 5 ft Shelby tube or equivalent

Number of Test Specimens

3

Test Specimen Size

Cylindrical specimens with a minimum diameter of 3.3 cm (1.3 in) and a height to diameter ratio of between 2.0 to 2.5. Maximum particle size shall be smaller than 1/6 the specimen diameter.

Keywords

Cohesive soil, lateral confinement, strain-controlled loading, stress-strain relationships, total stresses, unconsolidated undrained strength, UU, triaxial, shear

For more information, contact GeoTesting Express:



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770.645.6575


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978.635.0424


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224.676.1371


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212.566.6630



info@geotesting.com

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