ASTM D2974-07a

    Standard Test Methods for Moisture, Ash, and Organic Matter of Peat and Other Organic Soils


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    1. Scope

    1.1 These test methods cover the measurement of moisture content, ash content, and organic matter in peats and other organic soils, such as organic clays, silts, and mucks.

    1.1.1 Method A – moisture is determined by drying peat or organic sample at 105 °C.

    1.1.2 Method B – Alternative moisture method which removes the total moisture in two steps: (1) evaporation of moisture at room temperature, (2) subsequent oven drying of air dried sample at 105 °C.

    1.1.3 Method C – Ash content of a peat or organic soil sample is determined by igniting oven dried sample from moisture content determination in a muffle furnace at 440 °C.

    1.1.4 Method D – Ash content of a peat or organic soil sample is determined by igniting oven dried sample from moisture content determination in a muffle furnace at 750 °C.

    1.2 This test method should be used for geotechnical and general classification. In addition, the test method should be used when peats are being evaluated for use as a fuel.

    1.3 The values stated in SI units are to be regarded as the standard. No other units of measurement are included in this standard. Use Practice D 6026 for determining significant digits to report.

    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.


    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

    D653 Terminology Relating to Soil, Rock, and Contained Fluids

    D2216 Test Methods for Laboratory Determination of Water (Moisture) Content of Soil and Rock by Mass

    D2944 Practice of Sampling Processed Peat Materials

    D3740 Practice for Minimum Requirements for Agencies Engaged in Testing and/or Inspection of Soil and Rock as Used in Engineering Design and Construction

    D4753 Guide for Evaluating, Selecting, and Specifying Balances and Standard Masses for Use in Soil, Rock, and Construction Materials Testing

    D6026 Practice for Using Significant Digits in Geotechnical Data

    E145 Specification for Gravity-Convection and Forced-Ventilation Ovens


    ICS Code

    ICS Number Code 65.080 (Fertilizers)

    UNSPSC Code

    UNSPSC Code 15101603(Peat); 11111800(Clays)


    Referencing This Standard
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    DOI: 10.1520/D2974-07A

    Citation Format

    ASTM D2974-07a, Standard Test Methods for Moisture, Ash, and Organic Matter of Peat and Other Organic Soils, ASTM International, West Conshohocken, PA, 2007, www.astm.org

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