ASTM D5994/D5994M Measuring Core Thickness of Textured Geomembranes 

ASTM D5994/D5994M measures the core thickness of textured geomembranes. The values indicated in either SI or inch-pound units are to be regarded as standard.... Read More

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    ASTM D5994/D5994M covers all commercially available textured geomembranes deployed as manufactured geomembrane sheets. Many geomembranes have thickness as their basic index parameter for controlling and tracking their quality.

    Test Procedure:

    In ASTM D5994/D5994M, the core thickness of a textured geomembrane is determined as the average value of calculations taken on replicate specimens of the sample under investigation. The thickness of each specimen is measured at a specific location as the distance between two-gauge points. The opposing thickness gauge points are manufactured to a defined geometry, with a specified force applied along their axis.

    Video 01: ASTM D5994 Thickness textured geomembrane

    Specimen Size

    For ASTM D5994/D5994M, the specimens should have a temperature equilibrium of 21 ± 2 °C [70 ± 4 °F] and relative humidity of 60 ± 10 %.


    The average thickness of the sample is calculated from the individual specimen results and recorded to the nearest 0.025 mm or 0.001 in.


    ASTM D5994/D5994M measures the core thickness of textured geomembranes.


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