ASTM C31/C31M-08a

    Historical Standard: ASTM C31/C31M-08a Standard Practice for Making and Curing Concrete Test Specimens in the Field

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    ASTM C31 / C31M

    1. Scope

    1.1 This practice covers procedures for making and curing cylinder and beam specimens from representative samples of fresh concrete for a construction project.

    1.2 The concrete used to make the molded specimens shall be sampled after all on-site adjustments have been made to the mixture proportions, including the addition of mix water and admixtures. This practice is not satisfactory for making specimens from concrete not having measurable slump or requiring other sizes or shapes of specimens.

    1.3 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. The SI units are shown in brackets.

    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. (WarningFresh hydraulic cementitious mixtures are caustic and may cause chemical burns to exposed skin and tissue upon prolonged exposure. )

    1.5 The text of this standard references notes which provide explanatory material. These notes shall not be considered as requirements of the standard.


    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

    C125 Terminology Relating to Concrete and Concrete Aggregates

    C138/C138M Test Method for Density (Unit Weight), Yield, and Air Content (Gravimetric) of Concrete

    C143/C143M Test Method for Slump of Hydraulic-Cement Concrete

    C172 Practice for Sampling Freshly Mixed Concrete

    C173/C173M Test Method for Air Content of Freshly Mixed Concrete by the Volumetric Method

    C231 Test Method for Air Content of Freshly Mixed Concrete by the Pressure Method

    C330 Specification for Lightweight Aggregates for Structural Concrete

    C403/C403M Test Method for Time of Setting of Concrete Mixtures by Penetration Resistance

    C470/C470M Specification for Molds for Forming Concrete Test Cylinders Vertically

    C511 Specification for Mixing Rooms, Moist Cabinets, Moist Rooms, and Water Storage Tanks Used in the Testing of Hydraulic Cements and Concretes

    C617 Practice for Capping Cylindrical Concrete Specimens

    C1064/C1064M Test Method for Temperature of Freshly Mixed Hydraulic-Cement Concrete

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

    American Concrete Institute Publication

    309R Guide for Consolidation of Concrete


    ICS Code

    ICS Number Code 91.100.30 (Concrete and concrete products)

    UNSPSC Code

    UNSPSC Code 30111500(Concrete and mortars)


    DOI: 10.1520/C0031_C0031M-08A

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