ASTM D5731-02

    Standard Test Method for Determination of the Point Load Strength Index of Rock


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    1. Scope

    1.1 This test method covers the guidelines, requirements, and procedures for determining the point load strength index of rock. Specimens in the form of rock cores, blocks, or irregular lumps can be tested by this test method. This test method can be performed in the field or laboratory because the testing machine is portable. This is an index test and is intended to be used to classify and characterize rock.

    1.2 This test method applies to hard rock (compressive strength over 15 MPa (2200 psi)).

    1.3 All observed and calculated values shall conform to the guidelines for significant digits and rounding established in Practice D 6026.

    1.3.1 The method used to specify how data are collected, calculated, or recorded in this standard is not directly related to the accuracy to which the data can be applied in design or other uses, or both. How one applies the results obtained using this standard is beyond its scope.

    1.4 The values stated in the SI units are to be regarded as standard.

    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 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

    D653 Terminology Relating to Soil, Rock, and Contained Fluids

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

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

    D5079 Practices for Preserving and Transporting Rock Core Samples

    D6026 Practice for Using Significant Digits in Geotechnical Data

    D7012 Test Methods for Compressive Strength and Elastic Moduli of Intact Rock Core Specimens under Varying States of Stress and Temperatures

    E18 Test Methods for Rockwell Hardness of Metallic Materials

    E122 Practice for Calculating Sample Size to Estimate, With Specified Precision, the Average for a Characteristic of a Lot or Process


    ICS Code

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

    UNSPSC Code

    UNSPSC Code 60104402(Rock specimens)


    Referencing This Standard
    Link Here
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    DOI: 10.1520/D5731-02

    Citation Format

    ASTM D5731-02, Standard Test Method for Determination of the Point Load Strength Index of Rock, ASTM International, West Conshohocken, PA, 2002, www.astm.org

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