ASTM D7004/D7004M-03(2021)

Standard Test Method for Grab Tensile Properties of Reinforced Geomembranes

SIGNIFICANCE AND USE
4.1 This test method evaluates grab tensile properties of reinforced geomembranes for the purposes of quality control, quality assurance, and research. In order to evaluate the full contribution of the reinforcement, testing is performed parallel to the directions of reinforcement. This test method is an index test and is not intended for design purposes.
SCOPE
1.1 This test method is used to measure the grab tensile properties of reinforced geomembranes.  
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.

General Information

• Status: Published
• Publication Date: 30-Jun-2021
• ICS: 59.080.70 - Geotextiles
• Technical Committee: D35 - Geosynthetics
• Drafting Committee: D35.10 - Geomembranes

Relations

• Refers: ASTM D4439-24 - Standard Terminology for Geosynthetics
• Effective Date: 01-Feb-2024
• Refers: ASTM D4354-12(2020) - Standard Practice for Sampling of Geosynthetics and Rolled Erosion Control Products (RECPs) for Testing
• Effective Date: 01-May-2020
• Refers: ASTM D4439-18 - Standard Terminology for Geosynthetics
• Effective Date: 15-Apr-2018
• Refers: ASTM D4439-17 - Standard Terminology for Geosynthetics
• Effective Date: 01-Aug-2017
• Refers: ASTM D4439-15a - Standard Terminology for Geosynthetics
• Effective Date: 01-Sep-2015
• Refers: ASTM D4439-15 - Standard Terminology for Geosynthetics
• Effective Date: 01-Jul-2015
• Refers: ASTM D4439-14 - Standard Terminology for Geosynthetics
• Effective Date: 01-Mar-2014
• Refers: ASTM D4354-12 - Standard Practice for Sampling of Geosynthetics and Rolled Erosion Control Products(RECPs) for Testing
• Effective Date: 01-Jul-2012
• Refers: ASTM D76/D76M-11 - Standard Specification for Tensile Testing Machines for Textiles
• Effective Date: 01-Dec-2011
• Refers: ASTM D4439-11 - Standard Terminology for Geosynthetics
• Effective Date: 01-Oct-2011
• Refers: ASTM D4354-99(2009) - Standard Practice for Sampling of Geosynthetics for Testing
• Effective Date: 15-Jan-2009
• Refers: ASTM D4354-99(2004) - Standard Practice for Sampling of Geosynthetics for Testing
• Effective Date: 01-Nov-2004
• Refers: ASTM D4439-04 - Standard Terminology for Geosynthetics
• Effective Date: 01-Jun-2004
• Refers: ASTM D4439-02 - Standard Terminology for Geosynthetics
• Effective Date: 10-Aug-2002
• Refers: ASTM D4439-00 - Standard Terminology for Geosynthetics
• Effective Date: 10-Sep-2001

Overview

ASTM D7004/D7004M-03(2021), published by ASTM International, is the recognized standard test method for evaluating the grab tensile properties of reinforced geomembranes. This method is critical for ensuring quality control, quality assurance, and research consistency in geomembrane production and installation. The standard outlines procedures for measuring the tensile strength of geomembranes that are internally reinforced with textile materials, ensuring a uniform approach to testing across the industry.

Key Topics

• Purpose and Scope
  This standard provides a reliable method to measure the grab tensile properties (strength and elongation) of reinforced geomembranes. These properties are essential indicators of durability and suitability for demanding containment applications.

• Test Directions
  Testing is performed parallel to the direction of reinforcement within the geomembrane to fully assess the contribution of reinforcement materials. Both machine and transverse directions, or any direction of reinforcement, are considered as required by the material's construction.

• Specimen Preparation
  The standard precisely defines specimen dimensions and orientation, ensuring consistency. Specimens must exclude damaged material and be cut to capture the properties of different reinforcing yarns.

• Test Conditions
  Standard atmospheric conditions for geosynthetics testing are mandated:

  • Temperature: 21 ± 2°C [70 ± 4°F]
  • Relative Humidity: 50 to 70% This provides repeatable and comparable results across facilities.

• Reporting Requirements
  Results must include material identification, test direction, average and standard deviation for peak strength, and elongation at peak load. Any deviations from the procedure should be reported for transparency.

• Index Test
  ASTM D7004/D7004M is an index test method and is not intended for project design calculations but serves as a standard reference for material comparisons and quality benchmarks.

Applications

• Quality Control and Assurance
  Manufacturers and installers use ASTM D7004/D7004M to verify the integrity of reinforced geomembranes before deployment in environmental and civil engineering projects. Regular testing ensures that materials meet project and regulatory specifications.

• Material Comparison and Selection
  Comparative testing between geomembrane products enables engineers and specifiers to select materials with proven grab tensile properties, supporting risk mitigation in containment applications.

• Research and Development
  R&D teams leverage this standard for consistent evaluation of new geomembrane composites and reinforcements. It supports innovation while maintaining industry reliability.

• Regulatory Compliance
  Project owners and regulators may reference ASTM D7004/D7004M as a baseline standard for performance requirements in waste containment, mining, and water resource management projects.

Related Standards

For comprehensive geosynthetics testing and terminology, the following ASTM standards are closely associated with ASTM D7004/D7004M:

• ASTM D76/D76M - Specification for Tensile Testing Machines for Textiles
• ASTM D4354 - Practice for Sampling of Geosynthetics and Rolled Erosion Control Products
• ASTM D4439 - Terminology for Geosynthetics

By implementing ASTM D7004/D7004M-03(2021), organizations can ensure the consistent evaluation of reinforced geomembrane tensile properties, supporting robust quality assurance programs and fostering material performance in critical environmental and civil infrastructure projects. Using this standard helps meet internationally recognized quality requirements and promotes reliable, safe, and efficient geomembrane applications.

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: D7004/D7004M − 03 (Reapproved 2021)
Standard Test Method for
Grab Tensile Properties of Reinforced Geomembranes
This standard is issued under the fixed designation D7004/D7004M; 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 3.1.2 atmosphere for testing geosynthetics, n—air main-
tained at a relative humidity between 50 to 70 % and a
1.1 This test method is used to measure the grab tensile
temperature of 21 6 2 °C [70 6 4 °F].
properties of reinforced geomembranes.
3.1.3 reinforced geomembrane, n—a geomembrane inter-
1.2 The values stated in either SI units or inch-pound units
nally reinforced with a textile.
are to be regarded separately as standard. The values stated in
3.1.4 yarn, n—a generic term for a continuous strand of
each system are not necessarily exact equivalents; therefore, to
textile fibers, filaments, or material in a form suitable for
ensure conformance with the standard, each system shall be
knitting, weaving, or otherwise intertwining to form a textile
used independently of the other, and values from the two
fabric.
systems shall not be combined.
1.3 This standard does not purport to address all of the
4. Significance and Use
safety concerns, if any, associated with its use. It is the
4.1 This test method evaluates grab tensile properties of
responsibility of the user of this standard to establish appro-
reinforced geomembranes for the purposes of quality control,
priate safety, health, and environmental practices and deter-
quality assurance, and research. In order to evaluate the full
mine the applicability of regulatory limitations prior to use.
contribution of the reinforcement, testing is performed parallel
1.4 This international standard was developed in accor-
to the directions of reinforcement. This test method is an index
dance with internationally recognized principles on standard-
test and is not intended for design purposes.
ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom-
5. Apparatus
mendations issued by the World Trade Organization Technical
5.1 Tensile Testing Machine—Constant rate of extension
Barriers to Trade (TBT) Committee.
(CRE) equipment meeting the requirements of Specification
D76/D76M. The load cell shall be accurate to within 61%of
2. Referenced Documents
the applied force. The drive mechanism shall be able to control
2.1 ASTM Standards:
the rate of extension to within 61 % of the targeted rate.
D76/D76M Specification for Tensile Testing Machines for
5.2 Grips—One of the grips must be self-aligning to com-
Textiles
pensate for uneven distribution of force across the specimen.
D4354 Practice for Sampling of Geosynthetics and Rolled
The clamping force and the clamp surfaces shall hold the
Erosion Control Products (RECPs) for Testing
specimen firmly without causing damage. The clamps shall be
D4439 Terminology for Geosynthetics
capable of gripping a 25 mm [1 in.] by 25 mm [1 in.] area.This
can be accomplished by either using 25 mm [1 in.] square
3. Terminology
clamp faces or by using clamps with dimensions of 25 mm
3.1 Definitions:
[1 in.] by greater than 25 mm [1 in.] and crossing the clamps in
3.1.1 Definitions of terms applying to this test method
the grips so that only a 25 mm [1 in.] by 25 mm [1 in.] area is
appear in Terminology D4439.
gripped.
5.3 Recording Mechanism—The testing machine shall be
This test method is under the jurisdiction of ASTM Committee D35 on
equipped with equipment capable of producing a hard copy of
Geosynthetics and is the direct responsibility of Subcommittee D35.10 on Geomem-
the force versus displacement curve. Electronic data acquisi-
branes.
tion with printer capabilities or direct recording devices are
Current edition approved July 1, 2021. Published July 2021. Originally approved
ɛ1
acceptable.
in 2003. Last previous edition approved in 2013 as D7004/D7004M – 03 (2013) .
DOI: 10.1520/D7004_D7004M-03R21.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or 6. Sampling, Test Specimens, and Test Units
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
6.1 Lot Sample—For the lot sample, take rolls of geomem-
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. brane per the applicable project specification, or as agreed
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D7004/D7004M − 03 (2021)
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