ASTM C348 - 08

    Standard Test Method for Flexural Strength of Hydraulic-Cement Mortars

    Active Standard ASTM C348 | Developed by Subcommittee: C01.27

    Book of Standards Volume: 04.01


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    Significance and Use

    This test method provides a means for determining the flexural strength of hydraulic cement mortars. Portions of the mortar prisms tested in flexure according to this test method may be used for the determination of compressive strength in accordance with Test Method C 349.

    The values are determined from this test method for research or reference purposes only and are not used for determining compliance with specification requirements.

    1. Scope

    1.1 This test method covers the determination of the flexural strength of hydraulic-cement mortars.

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

    1.3 Values in SI units shall be obtained by measurement in SI units or by appropriate conversion, using the Rules for Conversion and rounding given in Standard IEEE/ASTM SI 10, of measurements made in other units.

    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. (Warning—Fresh hydraulic cementitious mixtures are caustic and may cause chemical burns to skin and tissue upon prolonged exposure. )


    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

    C109/C109M Test Method for Compressive Strength of Hydraulic Cement Mortars (Using 2-in. or [50-mm] Cube Specimens)

    C230/C230M Specification for Flow Table for Use in Tests of Hydraulic Cement

    C305 Practice for Mechanical Mixing of Hydraulic Cement Pastes and Mortars of Plastic Consistency

    C349 Test Method for Compressive Strength of Hydraulic-Cement Mortars (Using Portions of Prisms Broken in Flexure)

    C670 Practice for Preparing Precision and Bias Statements for Test Methods for Construction Materials

    C778 Specification for Sand

    C1005 Specification for Reference Masses and Devices for Determining Mass and Volume for Use in the Physical Testing of Hydraulic Cements

    C1437 Test Method for Flow of Hydraulic Cement Mortar


    ICS Code

    ICS Number Code 91.100.10 (Cement. Gypsum. Lime. Mortar)

    UNSPSC Code

    UNSPSC Code 30111504(Mortars)


    DOI: 10.1520/C0348-08

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    ASTM C348

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