ASTM D4751-21a PDF

Scope: 1.1 These test methods cover the determination of the apparent opening size (AOS) of a geotextile either by drysieving glass beads through a geotextile (Methods A1 and A2) or by using a capillary porometer (Method B). 1.2 Method B will not be used in lieu of Method A unless the pre-qualification procedure specified in this standard is followed. 1.3 These test methods show 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. 1.4 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

ASTM D4751-21a Referenced Document

ASTM D1331 Standard Test Methods for Surface and Interfacial Tension of Solutions of Surface-Active Agents
ASTM D1776/D1776M Standard Practice for Conditioning and Testing Textiles
ASTM D4354 Standard Practice for Sampling of Geosynthetics for Testing
ASTM D4439 Standard Terminology for Geosynthetics*， 2024-02-01 Update
ASTM D6767 Standard Test Method for Pore Size Characteristics of Geotextiles by Capillary Flow Test
ASTM E11 Standard Specification for Wire Cloth and Sieves for Testing Purposes
ASTM E691 Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method

2021 ASTM D4751-21a Standard Test Methods for Determining Apparent Opening Size of a Geotextile
2021 ASTM D4751-21 Standard Test Methods for Determining Apparent Opening Size of a Geotextile
2020 ASTM D4751-20b Standard Test Methods for Determining Apparent Opening Size of a Geotextile
2020 ASTM D4751-20a Standard Test Methods for Determining Apparent Opening Size of a Geotextile
2020 ASTM D4751-20 Standard Test Methods for Determining Apparent Opening Size of a Geotextile
2016 ASTM D4751-16 Standard Test Methods for Determining Apparent Opening Size of a Geotextile
2012 ASTM D4751-12 Standard Test Method for Determining Apparent Opening Size of a Geotextile
2004 ASTM D4751-04 Standard Test Method for Determining Apparent Opening Size of a Geotextile
1999 ASTM D4751-99a(2004) Standard Test Method for Determining Apparent Opening Size of a Geotextile
1999 ASTM D4751-99a Standard Test Method for Determining Apparent Opening Size of a Geotextile