ASTM D5493-23

Standard Test Method for Permittivity of Geotextiles Under Load

SIGNIFICANCE AND USE
5.1 The thickness of a geotextile decreases with increase in the normal compressive stress. This decrease in thickness may result in the partial closing or the opening of the voids of geotextile depending on its initial structure and the boundary conditions.  
5.2 This test method measures the permittivity due to a change of void structure of a geotextile as a result of an applied compressive stress.
SCOPE
1.1 This test method covers the determination of the water permittivity behavior of geotextiles in a direction normal to the plane of the geotextile when subjected to specific normal compressive loads.  
1.2 Use of this test method is limited to geotextiles. This test method is not intended for application with geotextile-related products such as geogrids, geonets, geomembranes, and other geocomposites.  
1.3 The values stated in SI units are to be regarded as the standard. The inch-pound units given in parentheses are 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.

General Information

• Status: Published
• Publication Date: 30-Apr-2023
• ICS: 59.080.70 - Geotextiles
• Technical Committee: D35 - Geosynthetics
• Drafting Committee: D35.03 - Permeability and Filtration

Relations

• Refers: ASTM D4354-12(2020) - Standard Practice for Sampling of Geosynthetics and Rolled Erosion Control Products (RECPs) for Testing
• Effective Date: 01-May-2020

Standards Content (Sample)

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.
Designation: D5493 − 23
Standard Test Method for
1
Permittivity of Geotextiles Under Load
This standard is issued under the fixed designation D5493; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope Geotextiles by Permittivity
D4716/D4716M Test Method for Determining the (In-plane)
1.1 This test method covers the determination of the water
Flow Rate per Unit Width and Hydraulic Transmissivity
permittivity behavior of geotextiles in a direction normal to the
of a Geosynthetic Using a Constant Head
plane of the geotextile when subjected to specific normal
E11 Specification for Woven Wire Test Sieve Cloth and Test
compressive loads.
Sieves
1.2 Use of this test method is limited to geotextiles. This test
method is not intended for application with geotextile-related
3. Terminology
products such as geogrids, geonets, geomembranes, and other
3.1 Definitions:
geocomposites.
3.1.1 geotextile, n—any permeable textile material used
1.3 The values stated in SI units are to be regarded as the
with foundation, soil, rock, earth, or any other geotechnical
standard. The inch-pound units given in parentheses are for
engineering related material as an integral part of a manmade
information only.
project, structure, or system (see Terminology D4439).
1.4 This standard does not purport to address all of the
3.1.2 hydraulic gradient, i, n—the loss of hydraulic head per
safety concerns, if any, associated with its use. It is the
unit distance of flow, dh/dL (see Test Method D4716/
responsibility of the user of this standard to establish appro-
D4716M).
priate safety, health, and environmental practices and deter-
–1
3.1.3 permittivity, (ψ), (T ), n—of geotextiles, the volumet-
mine the applicability of regulatory limitations prior to use.
ric flow rate of water per unit cross-sectional area per unit head
1.5 This international standard was developed in accor-
under laminar flow conditions, in the normal direction through
dance with internationally recognized principles on standard-
a geotextile (see Terminology D4439).
ization established in the Decision on Principles for the
3.2 For the definitions of other terms relating to geotextiles,
Development of International Standards, Guides and Recom-
refer to Terminology D4439. For the definitions of textile
mendations issued by the World Trade Organization Technical
terms, refer to Terminology D123. For the definitions of
Barriers to Trade (TBT) Committee.
coefficient of permeability, refer to Terminology D653.
2. Referenced Documents
4. Summary of Test Method
2
2.1 ASTM Standards:
4.1 This test method provides a procedure for measuring the
D123 Terminology Relating to Textiles
water flow, in the normal direction, through a known cross
D653 Terminology Relating to Soil, Rock, and Contained
section of a single layer of a geotextile at a predetermined
Fluids
constant hydraulic head over a range of applied normal
D4354 Practice for Sampling of Geosynthetics and Rolled
compressive stresses.
Erosion Control Products (RECPs) for Testing
D4439 Terminology for Geosynthetics
4.2 The permittivity of a geotextile, ψ, can be determined by
D4491/D4491M Test Methods for Water Permeability of
measuring the flow rate of water, in the normal direction,
through a known cross section of a geotextile at a predeter-
mined constant water head.
1
This test method is under the jurisdiction of ASTM Committee D35 on
Geosynthetics and is the direct responsibility of Subcommittee D35.03 on Perme- 4.3 Water flow through geotextiles can be laminar, transient,
ability and Filtration.
or turbulent, and therefore permittivity cannot be taken as a
Current edition approved May 1, 2023. Published June 2023. Originally
constant.
approved in 1993. Last previous edition approved in 2016 as D5493 – 06 (2016).
DOI: 10.1520/D5493-23.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or 5. Significance and Use
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
5.1 The thickness of a geotextile decreases with increase in
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. the normal compressive stress. This decrease in thickness may
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D5493 − 23
result in the partial closing or the opening of the voids of 6.3
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: D5493 − 06 (Reapproved 2016) D5493 − 23
Standard Test Method for
1
Permittivity of Geotextiles Under Load
This standard is issued under the fixed designation D5493; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 This test method covers the determination of the water permittivity behavior of geotextiles in a direction normal to the plane
of the geotextile when subjected to specific normal compressive loads.
1.2 Use of this test method is limited to geotextiles. This test method is not intended for application with geotextile-related
products such as geogrids, geonets, geomembranes, and other geocomposites.
1.3 The values stated in SI units are to be regarded as the standard. The inch-pound units given in parentheses are 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 and healthsafety, 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.
2. Referenced Documents
2
2.1 ASTM Standards:
D123 Terminology Relating to Textiles
D653 Terminology Relating to Soil, Rock, and Contained Fluids
D4354 Practice for Sampling of Geosynthetics and Rolled Erosion Control Products (RECPs) for Testing
D4439 Terminology for Geosynthetics
D4491/D4491M Test Methods for Water Permeability of Geotextiles by Permittivity
D4716/D4716M Test Method for Determining the (In-plane) Flow Rate per Unit Width and Hydraulic Transmissivity of a
Geosynthetic Using a Constant Head
E11 Specification for Woven Wire Test Sieve Cloth and Test Sieves
3. Terminology
3.1 Definitions:
1
This test method is under the jurisdiction of ASTM Committee D35 on Geosynthetics and is the direct responsibility of Subcommittee D35.03 on Permeability and
Filtration.
Current edition approved Jan. 1, 2016May 1, 2023. Published June 2016June 2023. Originally approved in 1993. Last previous edition approved in 20112016 as
D5493 – 06 (2016).(2011). DOI: 10.1520/D5493-06R16.10.1520/D5493-23.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D5493 − 23
3.1.1 geotextile, n—any permeable textile material used with foundation, soil, rock, earth, or any other geotechnical engineering
related material as an integral part of a manmade project, structure, or system (see Terminology D4439).
3.1.2 hydraulic gradient, i, n—the loss of hydraulic head per unit distance of flow, dh/dL (see Test Method D4716/D4716M).
-1–1
3.1.3 permittivity, (ψ), (T ), nn——of geotextiles, the volumetric flow rate of water per unit cross-sectional area per unit head
under laminar flow conditions, in the normal direction through a geotextile (see Terminology D4439).
3.2 For the definitions of other terms relating to geotextiles, refer to Terminology D4439. For the definitions of textile terms, refer
to Terminology D123. For the definitions of coefficient of permeability, refer to Terminology D653.
4. Summary of Test Method
4.1 This test method provides a procedure for measuring the water flow, in the normal direction, through a known cross section
of a single layer of a geotextile at a predetermined constant hydraulic headshead over a range of applied normal compressive
stresses.
4.2 The permittivity of a geotextile, ψ, can be determined by measuring the flow rate of water, in the normal direction, through
a known cross section of a geotextile at a predetermined constant water heads. head.
4.3 Water flow through geotextiles can be laminar, transient, or turbulent, and therefore permittivity cannot be taken as a c
...