ASTM C1646 / C1646M - 08a

    Standard Practice for Making and Curing Test Specimens for Evaluating Resistance of Coarse Aggregate to Freezing and Thawing in Air-Entrained Concrete

    Active Standard ASTM C1646 / C1646M | Developed by Subcommittee: C09.67

    Book of Standards Volume: 04.02

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    Significance and Use

    This practice provides standard requirements for evaluating frost-susceptible coarse aggregate in air-entrained concrete subjected to freezing and thawing in accordance with Test Method C 666/C 666M.

    Concrete containing frost-resistant paste may not be resistant to freezing and thawing if it contains coarse aggregate that becomes critically saturated. An aggregate particle is considered to be critically saturated when there is insufficient unfilled pore space to accommodate the expansion of water that accompanies the freezing.

    The potential of the coarse aggregate to cause damage due to cycles of freezing and thawing is evaluated by Test Method C 666/C 666M.

    1. Scope

    1.1 This specification covers materials for use in hydraulic-cement concrete mixtures to be placed by shotcreting. It does not cover mixing, placement, curing, or protection of the concrete placed by shotcreting.

    1.2 This specification covers materials for both wet-mix and dry-mix shotcreting.

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

    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 the 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

    C33 Specification for Concrete Aggregates

    C39/C39M Test Method for Compressive Strength of Cylindrical Concrete Specimens

    C125 Terminology Relating to Concrete and Concrete Aggregates

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

    C150 Specification for Portland Cement

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

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

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

    C490 Practice for Use of Apparatus for the Determination of Length Change of Hardened Cement Paste, Mortar, and Concrete

    C494/C494M Specification for Chemical Admixtures for Concrete

    C666/C666M Test Method for Resistance of Concrete to Rapid Freezing and Thawing

    D75 Practice for Sampling Aggregates

    ACI Standard

    211.1 Practice for Selecting Proportions for Normal, Heavyweight, and Mass Concrete

    ICS Code

    ICS Number Code 91.100.30 (Concrete and concrete products)

    UNSPSC Code

    UNSPSC Code 30111800(Aggregates)

    DOI: 10.1520/C1646_C1646M-08A

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