• ASTM D 7012 : 2014 : EDT 1

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    Standard Test Methods for Compressive Strength and Elastic Moduli of Intact Rock Core Specimens under Varying States of Stress and Temperatures

    Available format(s):  Hardcopy, PDF

    Language(s):  English

    Published date:  08-14-2017

    Publisher:  American Society for Testing and Materials

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    1.1These four test methods cover the determination of the strength of intact rock core specimens in uniaxial and triaxial compression. Methods A and B determine the triaxial compressive strength at different pressures and Methods C and D determine the unconfined, uniaxial strength.

    1.2Methods A and B can be used to determine the angle of internal friction, angle of shearing resistance, and cohesion intercept.

    1.3Methods B and D specify the apparatus, instrumentation, and procedures for determining the stress-axial strain and the stress-lateral strain curves, as well as Young's modulus, E, and Poisson's ratio, υ. These methods make no provision for pore pressure measurements and specimens are undrained (platens are not vented). Thus, the strength values determined are in terms of total stress and are not corrected for pore pressures. These test methods do not include the procedures necessary to obtain a stress-strain curve beyond the ultimate strength.

    1.4Option A allows for testing at different temperatures and can be applied to any of the test methods, if requested.

    1.5This standard replaces and combines the following Standard Test Methods: D2664 Triaxial Compressive Strength of Undrained Rock Core Specimens Without Pore Pressure Measurements; D5407 Elastic Moduli of Undrained Rock Core Specimens in Triaxial Compression Without Pore Pressure Measurements; D2938 Unconfined Compressive Strength of Intact Rock Core Specimens; and D3148 Elastic Moduli of Intact Rock Core Specimens in Uniaxial Compression. The original four standards are now referred to as Methods in this standard.

    1.5.1Method A:Triaxial Compressive Strength of Undrained Rock Core Specimens Without Pore Pressure Measurements.

    1.5.1.1Method A is used for obtaining strength determinations. Strain is not typically measured; therefore a stress-strain curve is not produced.

    1.5.2Method B:Elastic Moduli of Undrained Rock Core Specimens in Triaxial Compression Without Pore Pressure Measurements.

    1.5.3Method C:Uniaxial Compressive Strength of Intact Rock Core Specimens.

    1.5.3.1Method C is used for obtaining strength determinations. Strain is not typically measured; therefore a stress-strain curve is not produced.

    1.5.4Method D:Elastic Moduli of Intact Rock Core Specimens in Uniaxial Compression.

    1.5.5Option A: Temperature Variation—Applies to any of the methods and allows for testing at temperatures above or below room temperature.

    1.6For an isotropic material in Test Methods B and D, the relation between the shear and bulk moduli and Young's modulus and Poisson's ratio are:

    Equation D7012-14E01_1

    Equation D7012-14E01_2

    where:

    G = shear modulus,
    K = bulk modulus,
    E = Young's modulus, and
    υ = Poisson's ratio.

    1.6.1The engineering applicability of these equations decreases with increasing anisotropy of the rock. It is desirable to conduct tests in the plane of foliation, cleavage or bedding and at right angles to it to determine the degree of anisotropy. It is noted that equations developed for isotropic materials may give only approximate calculated results if the difference in elastic moduli in two orthogonal directions is greater than 10 % for a given stress level.

    Note 1:Elastic moduli measured by sonic methods (Test Method D2845) may often be employed as a preliminary measure of anisotropy.

    1.7Test Methods B and D for determining the elastic constants do not apply to rocks that undergo significant inelastic strains during the test, such as potash and salt. The elastic moduli for such rocks should be determined from unload-reload cycles that are not covered by these test methods.

    1.8The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

    1.9All observed and calculated values shall conform to the guidelines for significant digits and rounding established in Practice D6026.

    1.9.1The 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 analytical methods for engineering design.

    1.10This 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.

    1.11This 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.

    General Product Information - (Show below) - (Hide below)

    Committee D 18
    Document Type Test Method
    Publisher American Society for Testing and Materials
    Status Current
    Supersedes

    Standards Referenced By This Book - (Show below) - (Hide below)

    ASTM D 5878 : 2019 Standard Guides for Using Rock-Mass Classification Systems for Engineering Purposes
    ASTM D 4623 : 2016 Standard Test Method for Determination of In Situ Stress in Rock Mass by Overcoring Method—Three Component Borehole Deformation Gauge
    ASTM D 5873 : 2014 Standard Test Method for Determination of Rock Hardness by Rebound Hammer Method
    ASTM D 5731 : 2016 Standard Test Method for Determination of the Point Load Strength Index of Rock and Application to Rock Strength Classifications
    ASTM C 170/C170M : 2017 Standard Test Method for Compressive Strength of Dimension Stone

    Standards Referencing This Book - (Show below) - (Hide below)

    ASTM D 2216 : 2005 Standard Test Methods for Laboratory Determination of Water (Moisture) Content of Soil and Rock by Mass
    ASTM D 4543 : 2004 Standard Practices for Preparing Rock Core Specimens and Determining Dimensional and Shape Tolerances
    ASTM D 4543 : 1985 : R1991 : EDT 1 Standard Practices for Preparing Rock Core Specimens and Determining Dimensional and Shape Tolerances
    ASTM D 2845 : 2000 Standard Test Method for Laboratory Determination of Pulse Velocities and Ultrasonic Elastic Constants of Rock
    ASTM D 653 : 2007 Standard Terminology Relating to Soil, Rock, and Contained Fluids
    ASTM D 2216 : 2010 Standard Test Methods for Laboratory Determination of Water (Moisture) Content of Soil and Rock by Mass
    ASTM D 3740 : 2012 Standard Practice for Minimum Requirements for Agencies Engaged in Testing and/or Inspection of Soil and Rock as Used in Engineering Design and Construction
    ASTM D 2845 : 2005 Standard Test Method for Laboratory Determination of Pulse Velocities and Ultrasonic Elastic Constants of Rock
    ASTM D 3740 : 2019 Standard Practice for Minimum Requirements for Agencies Engaged in Testing and/or Inspection of Soil and Rock as Used in Engineering Design and Construction
    ASTM D 3740 : 2004 : REV A : EDT 1 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 D 3740 : 2008 Standard Practice for Minimum Requirements for Agencies Engaged in Testing and/or Inspection of Soil and Rock as Used in Engineering Design and Construction
    ASTM D 4543 : 2007 Standard Practices for Preparing Rock Core as Cylindrical Test Specimens and Verifying Conformance to Dimensional and Shape Tolerances
    ASTM D 6026 : 2013 Standard Practice for Using Significant Digits in Geotechnical Data
    ASTM D 6026 : 2006 Standard Practice for Using Significant Digits in Geotechnical Data
    ASTM D 3740 : 1999 : REV C 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 D 2845 : 2008 Standard Test Method for Laboratory Determination of Pulse Velocities and Ultrasonic Elastic Constants of Rock (Withdrawn 2017)
    ASTM E 122 : 2017 : R2022 Standard Practice for Calculating Sample Size to Estimate, With Specified Precision, the Average for a Characteristic of a Lot or Process
    ASTM E 122 : 2017 Standard Practice for Calculating Sample Size to Estimate, With Specified Precision, the Average for a Characteristic of a Lot or Process
    ASTM D 2845 : 2000 : R2004 : EDT 1 Standard Test Method for Laboratory Determination of Pulse Velocities and Ultrasonic Elastic Constants of Rock
    ASTM D 4543 : 2019 Standard Practices for Preparing Rock Core as Cylindrical Test Specimens and Verifying Conformance to Dimensional and Shape Tolerances
    ASTM D 4543 : 2008 : EDT 1 Standard Practices for Preparing Rock Core as Cylindrical Test Specimens and Verifying Conformance to Dimensional and Shape Tolerances (Withdrawn 2017)
    ASTM D 653 : 2020 : EDT 1 Standard Terminology Relating to Soil, Rock, and Contained Fluids
    ASTM D 4543 : 2001 Standard Practices for Preparing Rock Core Specimens and Determining Dimensional and Shape Tolerances
    ASTM D 6026 : 1999 Standard Practice for Using Significant Digits in Geotechnical Data
    ASTM D 3740 : 2011 Standard Practice for Minimum Requirements for Agencies Engaged in Testing and/or Inspection of Soil and Rock as Used in Engineering Design and Construction
    ASTM D 6026 : 2001 : EDT 1 Standard Practice for Using Significant Digits in Geotechnical Data
    ASTM D 3740 : 2010 Standard Practice for Minimum Requirements for Agencies Engaged in Testing and/or Inspection of Soil and Rock as Used in Engineering Design and Construction
    ASTM D 653 : 2021 : REV A Standard Terminology Relating to Soil, Rock, and Contained Fluids
    ASTM D 2216 : 2019 Standard Test Methods for Laboratory Determination of Water (Moisture) Content of Soil and Rock by Mass
    ASTM D 6026 : 1996 Standard Practice for Using Significant Digits in Geotechnical Data
    ASTM D 3740 : 2004 : REV A 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 D 4543 : 2008 Standard Practices for Preparing Rock Core as Cylindrical Test Specimens and Verifying Conformance to Dimensional and Shape Tolerances
    ASTM D 3740 : 2001 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 D 653 : 2021 Standard Terminology Relating to Soil, Rock, and Contained Fluids
    ASTM E 4 : 2021 Standard Practices for Force Calibration and Verification of Testing Machines
    ASTM D 653 : 2021 : REV B Standard Terminology Relating to Soil, Rock, and Contained Fluids
    ASTM D 6026 : 1996 : EDT 1 Standard Practice for Using Significant Digits in Geotechnical Data
    ASTM D 3740 : 2012 : REV A Standard Practice for Minimum Requirements for Agencies Engaged in Testing and/or Inspection of Soil and Rock as Used in Engineering Design and Construction
    ASTM D 3740 : 2003 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 D 2216 : 1998 Standard Test Method for Laboratory Determination of Water (Moisture) Content of Soil and Rock by Mass
    ASTM D 6026 : 2021 Standard Practice for Using Significant Digits and Data Records in Geotechnical Data
    ASTM D 2216 : 1971 Standard Method of Laboratory Determination Of Moisture Content Of Soil
    ASTM D 6026 : 2001 Standard Practice for Using Significant Digits in Geotechnical Data
    ASTM D 3740 : 2004 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
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