ASTM D4751-04

    Standard Test Method for Determining Apparent Opening Size of a Geotextile


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    1. Scope

    1.1 This test method is used to determine the apparent opening size (AOS) of a geotextile by sieving glass beads through a geotextile.

    1.2 This test method shows the values in both SI units and inch-pound units. "SI" units is the technically correct name for the system of metric units known as the International System of Units. "Inch-pound" units is the technically correct name for the customary units used in the United States. The values in inch-pound units are provided for information only.

    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

    C136 Test Method for Sieve Analysis of Fine and Coarse Aggregates

    D1776 Practice for Conditioning and Testing Textiles

    D4238 Test Method for Electrostatic Propensity of Textiles

    D4354 Practice for Sampling of Geosynthetics and Rolled Erosion Control Products(RECPs) for Testing

    D4439 Terminology for Geosynthetics

    E11 Specification for Woven Wire Test Sieve Cloth and Test Sieves


    ICS Code

    ICS Number Code 59.080.70 (Geotextiles)

    UNSPSC Code

    UNSPSC Code 30121702(Geotextile)


    Referencing This Standard

    DOI: 10.1520/D4751-04

    ASTM International is a member of CrossRef.


    Citation Format

    ASTM D4751-04, Standard Test Method for Determining Apparent Opening Size of a Geotextile, ASTM International, West Conshohocken, PA, 2004, www.astm.org

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