ASTM D4491/D4491M-22 PDF

Scope: 1.1 These test methods cover procedures for determining the hydraulic conductivity (water permeability) of geotextiles in terms of permittivity under standard testing conditions, in the uncompressed state. Included are three procedures: the constant head and falling head methods using a water flow apparatus, and the air flow method using an air flow apparatus. 1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined. 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.4 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 D4491/D4491M-22 Referenced Document

ASTM D123 Standard Terminology Relating to Textiles*， 2023-09-14 Update
ASTM D4439 Standard Terminology for Geosynthetics*， 2024-02-01 Update
ASTM D5199 Standard Test Method for Measuring the Nominal Thickness of Geosynthetics*， 2024-04-22 Update
ASTM D653 Standard Terminology Relating to Soil, Rock, and Contained Fluids
ASTM E691 Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method

2022 ASTM D4491/D4491M-22 Standard Test Methods for Water Permeability of Geotextiles by Permittivity
2021 ASTM D4491/D4491M-21 Standard Test Methods for Water Permeability of Geotextiles by Permittivity
2020 ASTM D4491/D4491M-20e1 Standard Test Methods for Water Permeability of Geotextiles by Permittivity
2020 ASTM D4491/D4491M-20 Standard Test Methods for Water Permeability of Geotextiles by Permittivity
2017 ASTM D4491/D4491M-17 Standard Test Methods for Water Permeability of Geotextiles by Permittivity
2016 ASTM D4491/D4491M-16 Standard Test Methods for Water Permeability of Geotextiles by Permittivity
2015 ASTM D4491/D4491M-15 Standard Test Methods for Water Permeability of Geotextiles by Permittivity
1999 ASTM D4491-99a(2014)e1 Standard Test Methods for Water Permeability of Geotextiles by Permittivity
1999 ASTM D4491-99a(2009) Standard Test Methods for Water Permeability of Geotextiles by Permittivity
1999 ASTM D4491-99a(2004)e1 Standard Test Methods for Water Permeability of Geotextiles by Permittivity
1999 ASTM D4491-99a(2004) Standard Test Methods for Water Permeability of Geotextiles by Permittivity
1999 ASTM D4491-99a Standard Test Methods for Water Permeability of Geotextiles by Permittivity