ASTM D6023 - 07

    Standard Test Method for Density (Unit Weight), Yield, Cement Content, and Air Content (Gravimetric) of Controlled Low-Strength Material (CLSM)

    Active Standard ASTM D6023 | Developed by Subcommittee: D18.15

    Book of Standards Volume: 04.09


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    1. Scope

    1.1 This test method explains determination of the density (Note 1) of freshly mixed Controlled Low-Strength Material (CLSM) and gives formulas for calculating the yield, cement content, and the air content of the CLSM. This test method is based on Test Method C 138 for Concrete.

    Note 1- Unit Weight was the previous terminology used to describe the property determined by this test method, which is mass per unit volume.

    1.2 All observed and calculated values shall conform to the guidelines for significant digits and rounding established in Practice D 6026.

    1.2.1 The method used to specify how data are collected, calculated, or recorded in this standard is not directly related to the accuracy to which the data can be applied in design or other uses, or both. How one applies the results obtained using this standard is beyond its scope.

    1.3 The values stated in SI units are to be regarded as standard. The inch-pound equivalents are shown for information only.

    1.4 CLSM is also known as flowable fill, controlled density fill, soil-cement slurry, soil-cement grout, unshrinkable fill, "K-Krete," and other similar names.

    1.5 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. (Warning: Fresh hydraulic cementitious mixtures are caustic and may cause chemical burns to skin and tissue upon prolonged exposure.)


    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

    C29/C29M Test Method for Bulk Density (Unit Weight) and Voids in Aggregate

    C125 Terminology Relating to Concrete and Concrete Aggregates

    C128 Test Method for Density, Relative Density (Specific Gravity), and Absorption of Fine Aggregate

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

    C150 Specification for Portland Cement

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

    D653 Terminology Relating to Soil, Rock, and Contained Fluids

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

    D4832 Test Method for Preparation and Testing of Controlled Low Strength Material (CLSM) Test Cylinders

    D5971 Practice for Sampling Freshly Mixed Controlled Low-Strength Material

    D6024 Test Method for Ball Drop on Controlled Low Strength Material (CLSM) to Determine Suitability for Load Application

    D6026 Practice for Using Significant Digits in Geotechnical Data

    D6103 Test Method for Flow Consistency of Controlled Low Strength Material (CLSM)


    ICS Code

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

    UNSPSC Code

    UNSPSC Code 30121900(Soil stabilizers and reinforcing materials)


    DOI: 10.1520/D6023-07

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