ASTM D2734 - 09

    Standard Test Methods for Void Content of Reinforced Plastics

    Active Standard ASTM D2734 | Developed by Subcommittee: D20.18

    Book of Standards Volume: 08.01


    Buy Standard (PDF)
    3 pages
    $37.00
    Buy Standard (Print)
    3 pages
    $37.00
    Buy Standard + Redline (PDF)
    6 pages
    $44.40

    Historical (view previous versions of standard)


    ASTM D2734

    Significance and Use

    The void content of a composite may significantly affect some of its mechanical properties. Higher void contents usually mean lower fatigue resistance, greater susceptibility to water penetration and weathering, and increased variation or scatter in strength properties. The knowledge of void content is desirable for estimation of quality of composites.

    1. Scope

    1.1 These test methods cover the void content of reinforced plastics or composites. The test methods are applicable to composites for which the effects of ignition on the materials are known. Most plastics, glass, and reinforcements fall into this class. These test methods are not applicable to composites for which the effects of ignition on the plastics, the reinforcement, and any fillers are unknown. This class may include silicone resins, which do not burn off completely, reinforcements consisting of metals, organic materials, or inorganic materials which may gain or lose weight, and fillers consisting of oxides, carbonates, etc., which may gain or lose weight. Note that separate weight loss tests of individual materials will usually, but not necessarily, give the same result as when all the materials are combined.

    Note 1—There is no known ISO equivalent to these test methods.

    1.2 The values stated in SI units are to be regarded as 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 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

    D618 Practice for Conditioning Plastics for Testing

    D792 Test Methods for Density and Specific Gravity (Relative Density) of Plastics by Displacement

    D1505 Test Method for Density of Plastics by the Density-Gradient Technique

    D2584 Test Method for Ignition Loss of Cured Reinforced Resins


    ICS Code

    ICS Number Code 83.120 (Reinforced plastics)

    UNSPSC Code

    UNSPSC Code 13100000(Rubber and elastomers)


    DOI: 10.1520/D2734-09

    ASTM International is a member of CrossRef.

    ASTM D2734

    Citing ASTM Standards
    Back to Top