ASTM C305 - 20

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

    Active Standard ASTM C305 | Developed by Subcommittee: C01.22

    Book of Standards Volume: 04.01


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    Significance and Use

    4.1 This practice is intended for use in the mechanical mixing of pastes and mortars for the testing of hydraulic cements.

    1. Scope

    1.1 This practice covers the mechanical mixing of hydraulic cement pastes and mortars of plastic consistency.

    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 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

    1.4 This 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.


    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

    C219 Terminology Relating to Hydraulic and Other Inorganic Cements

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

    C778 Specification for Standard Sand


    ICS Code

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

    UNSPSC Code

    UNSPSC Code 30111504(Mortars)


    Referencing This Standard
    Link Here
    Link to Active (This link will always route to the current Active version of the standard.)

    DOI: 10.1520/C0305-20

    Citation Format

    ASTM C305-20, Standard Practice for Mechanical Mixing of Hydraulic Cement Pastes and Mortars of Plastic Consistency, ASTM International, West Conshohocken, PA, 2020, www.astm.org

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