ASTM D2850-95(1999)

    Standard Test Method for Unconsolidated-Undrained Triaxial CompressionTest on Cohesive Soils


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    1. Scope

    1.1 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).

    1.2 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 pressure.

    Note 1--The determination of the unconfined compressive strength of cohesive soils is covered by Test Method D2166.

    Note 2--The determination of the consolidated, undrained strength of cohesive soils with pore pressure measurement is covered by Test Method D4767.

    1.3 The values stated in SI units are to be regarded as the standard. The values stated in inch-pound units and given in parentheses are approximate.

    1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.


    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    D422 Test Method for Particle-Size Analysis of Soils

    D653 Terminology Relating to Soil, Rock, and Contained Fluids

    D854 Test Methods for Specific Gravity of Soil Solids by Water Pycnometer

    D1587 Practice for Thin-Walled Tube Sampling of Soils for Geotechnical Purposes

    D2166/D2166M Test Method for Unconfined Compressive Strength of Cohesive Soil

    D2216 Test Methods for Laboratory Determination of Water (Moisture) Content of Soil and Rock by Mass

    D2487 Practice for Classification of Soils for Engineering Purposes (Unified Soil Classification System)

    D2488 Practice for Description and Identification of Soils (Visual-Manual Procedure)

    D3740 Practice for Minimum Requirements for Agencies Engaged in Testing and/or Inspection of Soil and Rock as Used in Engineering Design and Construction

    D4220/D4220M Practices for Preserving and Transporting Soil Samples

    D4318 Test Methods for Liquid Limit, Plastic Limit, and Plasticity Index of Soils

    D4753 Guide for Evaluating, Selecting, and Specifying Balances and Standard Masses for Use in Soil, Rock, and Construction Materials Testing

    D4767 Test Method for Consolidated Undrained Triaxial Compression Test for Cohesive Soils

    D6026 Practice for Using Significant Digits in Geotechnical Data

    D6913 Test Methods for Particle-Size Distribution (Gradation) of Soils Using Sieve Analysis


    ICS Code

    ICS Number Code 93.020 (Earth works. Excavations. Foundation construction. Underground works)

    UNSPSC Code

    UNSPSC Code 11111501(Soil)


    Referencing This Standard
    Link Here
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    DOI: 10.1520/D2850-95R99

    Citation Format

    ASTM D2850-95(1999), Standard Test Method for Unconsolidated-Undrained Triaxial CompressionTest on Cohesive Soils, ASTM International, West Conshohocken, PA, 1999, www.astm.org

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