ASTM C78 / C78M - 10e1

    Standard Test Method for Flexural Strength of Concrete (Using Simple Beam with Third-Point Loading)

    Active Standard ASTM C78 / C78M | Developed by Subcommittee: C09.61

    Book of Standards Volume: 04.02


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    Significance and Use

    3.1 This test method is used to determine the flexural strength of specimens prepared and cured in accordance with Test Methods C42/C42M or Practices C31/C31M or C192/C192M. Results are calculated and reported as the modulus of rupture. The strength determined will vary where there are differences in specimen size, preparation, moisture condition, curing, or where the beam has been molded or sawed to size.

    3.2 The results of this test method may be used to determine compliance with specifications or as a basis for proportioning, mixing and placement operations. It is used in testing concrete for the construction of slabs and pavements.

    1. Scope

    1.1 This test method covers the determination of the flexural strength of concrete by the use of a simple beam with third-point loading.

    1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.

    1.3 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

    C31/C31M Practice for Making and Curing Concrete Test Specimens in the Field

    C42/C42M Test Method for Obtaining and Testing Drilled Cores and Sawed Beams of Concrete

    C192/C192M Practice for Making and Curing Concrete Test Specimens in the Laboratory

    C617 Practice for Capping Cylindrical Concrete Specimens

    C1077 Practice for Agencies Testing Concrete and Concrete Aggregates for Use in Construction and Criteria for Testing Agency Evaluation

    E4 Practices for Force Verification of Testing Machines


    ICS Code

    ICS Number Code 91.100.30 (Concrete and concrete products)

    UNSPSC Code

    UNSPSC Code 30111500(Concrete and mortars)


    Referencing This Standard

    DOI: 10.1520/C0078_C0078M-10E01

    ASTM International is a member of CrossRef.

    Citation Format

    ASTM C78 / C78M-10e1, Standard Test Method for Flexural Strength of Concrete (Using Simple Beam with Third-Point Loading), ASTM International, West Conshohocken, PA, 2010, www.astm.org

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