ASTM D2850-23
Standard Test Method for Unconsolidated-Undrained Triaxial Compression Test on Cohesive Soils

Standard No.

ASTM D2850-23

Release Date

2023

Published By

American Society for Testing and Materials (ASTM)

Latest

ASTM D2850-23

Scope

1.1 This test method covers determination of the strength and stress-strain relationships of a cylindrical specimen of either intact, compacted, 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 application of the confining fluid pressure or during the compression phase of the test. The specimen is axially loaded 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/D2166M. NOTE 2—The determination of the consolidated, undrained strength of cohesive soils with pore pressure measurement is covered by Test Method D4767. 1.3 All observed and calculated values shall conform to the guidelines for significant digits and rounding established in Practice D6026. 1.3.1 The procedures used to specify how data are collected/ recorded or calculated in this standard are regarded as the industry standard. In addition, they are representative of the significant digits that generally should be retained. The procedures used do not consider material variation, purpose for obtaining the data, special purpose studies, or any considerations for the user’s objectives; and it is common practice to increase or reduce significant digits of reported data to be commensurate with these considerations. It is beyond the scope of this standard to consider significant digits used in analysis methods for engineering design. 1.4 Units—The values stated in SI units are to be regarded as the standard. The values given in parentheses are mathematical conversions to inch-pound units, which are provided for information only and are not considered standard. Reporting of test results in units other than SI shall not be regarded as nonconformance with this test method. 1.4.1 The converted inch-pound units use the gravitational system of units. In this system, the pound (lbf) represents a unit of force (weight), while the unit for mass is slugs. The slug unit is not given, unless dynamic (F = ma) calculations are involved. 1.5 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

ASTM D2850-23 Referenced Document

• ASTM D1587/D1587M Standard Practice for Thin-Walled Tube Sampling of Fine-Grained Soils for Geotechnical Purposes*， 2024-04-21 Update
• ASTM D2166/D2166M Standard Test Method for Unconfined Compressive Strength of Cohesive Soil*， 2024-04-21 Update
• ASTM D2216 Standard Test Method for Laboratory Determination of Water (Moisture) Content of Soil and Rock by Mass
• ASTM D2487 Standard Test Method for Classification Of Soils For Engineering Purposes
• ASTM D2488 Recommended Practice for Description Of Soils (Visual-Manual Procedure)
• ASTM D3740 Standard Practice for Minimum Requirements for Agencies Engaged in the Testing and/or Inspection of Soil and Rock as Used in Engineering Design and Construction
• ASTM D422 Standard Test Method for Particle-Size Analysis of Soils
• ASTM D4220/D4220M Standard Practices for Preserving and Transporting Soil Samples*， 2024-04-21 Update
• ASTM D4318 Standard Test Methods for Liquid Limit, Plastic Limit, and Plasticity Index of Soils
• ASTM D4753 Standard Specification for Evaluating, Selecting, and Specifying Balances and Scales for Use in Soil, Rock, and Construction Materials Testing
• ASTM D4767 Standard Test Method for Consolidated Undrained Triaxial Compression Test for Cohesive Soils
• ASTM D6026 Standard Practice for Using Significant Digits in Geotechnical Data
• ASTM D653 Standard Terminology Relating to Soil, Rock, and Contained Fluids
• ASTM D6913/D6913M Standard Test Methods for Particle-Size Distribution (Gradation) of Soils Using Sieve Analysis
• ASTM D854 Standard Test Methods for Specific Gravity of Soil Solids by the Water Displacement Method*， 2023-11-01 Update

ASTM D2850-23 history

• 2023 ASTM D2850-23 Standard Test Method for Unconsolidated-Undrained Triaxial Compression Test on Cohesive Soils
• 2015 ASTM D2850-15 Standard Test Method for Unconsolidated-Undrained Triaxial Compression Test on Cohesive Soils
• 2003 ASTM D2850-03a(2007) Standard Test Method for Unconsolidated-Undrained Triaxial Compression Test on Cohesive Soils
• 2003 ASTM D2850-03a Standard Test Method for Unconsolidated-Undrained Triaxial CompressionTest on Cohesive Soils
• 2003 ASTM D2850-03 Standard Test Method for Unconsolidated-Undrained Triaxial CompressionTest on Cohesive Soils
• 1999 ASTM D2850-95(1999) Standard Test Method for Unconsolidated-Undrained Triaxial CompressionTest on Cohesive Soils