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    ASTM C40 / C40M - 20

    Standard Test Method for Organic Impurities in Fine Aggregates for Concrete

    Active Standard ASTM C40 / C40M | Developed by Subcommittee: C09.20

    Book of Standards Volume: 04.02

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    Significance and Use

    4.1 This test method is used in making a preliminary determination of the acceptability of fine aggregates with respect to the requirements of Specification C33/C33M that relate to organic impurities.

    4.2 The principal value of this test method is to furnish a warning that injurious amounts of organic impurities may be present. When a sample subjected to this test produces a color darker than the standard color it is advisable to perform the test for the effect of organic impurities on the strength of mortar in accordance with Test Method C87/C87M.

    1. Scope


    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/C33M Specification for Concrete Aggregates

    C87/C87M Test Method for Effect of Organic Impurities in Fine Aggregate on Strength of Mortar

    C125 Terminology Relating to Concrete and Concrete Aggregates

    C702/C702M Practice for Reducing Samples of Aggregate to Testing Size

    D75/D75M Practice for Sampling Aggregates

    D1544 Test Method for Color of Transparent Liquids (Gardner Color Scale)

    ICS Code

    ICS Number Code 91.100.30 (Concrete and concrete products)

    Referencing This Standard
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    DOI: 10.1520/C0040_C0040M-20

    Citation Format

    ASTM C40 / C40M-20, Standard Test Method for Organic Impurities in Fine Aggregates for Concrete, ASTM International, West Conshohocken, PA, 2020, www.astm.org

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