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ASTM D5321/D5321M-13

(Test Method)

Standard Test Method for Determining the Shear Strength of Soil-Geosynthetic and Geosynthetic-Geosynthetic Interfaces by Direct Shear

Standard Test Method for Determining the Shear Strength of Soil-Geosynthetic and Geosynthetic-Geosynthetic Interfaces by Direct Shear

SIGNIFICANCE AND USE
5.1 The procedure described in this test method for determination of the shear resistance of the soil and geosynthetic or geosynthetic and geosynthetic interface is intended as a performance test to provide the user with a set of design values for the test conditions examined. The test specimens and conditions, including normal stresses, are generally selected by the user.  
5.2 This test method may be used for acceptance testing of commercial shipments of geosynthetics, but caution is advised as outlined in 5.2.1.  
5.2.1 The shear resistance can be expressed only in terms of actual test conditions (see Note 2 and Note 3). The determined value may be a function of the applied normal stress, material characteristics (for example, of the geosynthetic), soil properties, size of sample, moisture content, drainage conditions, displacement rate, magnitude of displacement, and other parameters.Note 2—In the case of acceptance testing requiring the use of soil, the user must furnish the soil sample, soil parameters, and direct shear test parameters. The method of test data interpretation for purposes of acceptance should be mutually agreed to by the users of this test method.Note 3—Testing under this test method should be performed by laboratories qualified in the direct shear testing of soils and meeting the requirements of Practice D3740, especially since the test results may depend on site-specific and test conditions.  
5.2.2 This test method measures the total resistance to shear between a geosynthetic and a supporting material (substratum) or a geosynthetic and an overlying material (superstratum). The total shear resistance may be a combination of sliding, rolling and interlocking of material components.  
5.2.3 This test method does not distinguish between individual mechanisms, which may be a function of the soil and geosynthetic used, method of material placement and hydration, normal and shear stresses applied, means used to hold the geosynthetic in place, r...
SCOPE
1.1 This test method covers a procedure for determining the shear resistance of a geosynthetic against soil, or a geosynthetic against another geosynthetic, under a constant rate of deformation.  
1.1.1 The test method is intended to indicate the performance of the selected specimen by attempting to model certain field conditions. Results obtained from this method may be limited in their applicability to the specific conditions considered in the testing.  
1.2 The test method is applicable for all geosynthetics, with the exception of geosynthetic clay liners (GCLs) which are addressed in Test Method D6243/D6243M.  
1.3 The test method is not suited for the development of exact stress-strain relationships for the test specimen due to the non-uniform distribution of shearing forces and displacement.  
1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.  
1.5 This standard does not purport to address all 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.

General Information

Status
Historical
Publication Date
22-Aug-2013
ICS
59.080.70 - Geotextiles
Technical Committee
D35 - Geosynthetics
Drafting Committee
D35.01 - Mechanical Properties
Current Stage
Ref Project

Relations

Replaces
ASTM D5321-12 - Standard Test Method for Determining the Shear Strength of Soil-Geosynthetic and Geosynthetic-Geosynthetic Interfaces by Direct Shear
Effective Date
23-Aug-2013
Replaced By
ASTM D5321/D5321M-14 - Standard Test Method for Determining the Shear Strength of Soil-Geosynthetic and Geosynthetic-Geosynthetic Interfaces by Direct Shear
Effective Date
01-Jan-2014
Referred By
ASTM D6434-12(2018) - Standard Guide for the Selection of Test Methods for Flexible Polypropylene Geomembranes
Effective Date
23-Aug-2013
Referred By
ASTM D7931/D7931M-21a - Standard Guide for Specifying Drainage Geocomposites
Effective Date
23-Aug-2013
Referred By
ASTM D7702/D7702M-14(2021) - Standard Guide for Considerations When Evaluating Direct Shear Results Involving Geosynthetics
Effective Date
23-Aug-2013
Referred By
ASTM D7273/D7273M-08(2020) - Standard Guide for Acceptance Testing Requirements for Geonets and Geonet Drainage Geocomposites
Effective Date
23-Aug-2013
Referred By
ASTM D6243/D6243M-20 - Standard Test Method for Determining the Internal and Interface Shear Strength of Geosynthetic Clay Liner by the Direct Shear Method
Effective Date
23-Aug-2013
Referred By
ASTM D6455-11(2018) - Standard Guide for the Selection of Test Methods for Prefabricated Bituminous Geomembranes (PBGMs)
Effective Date
23-Aug-2013
Referred By
ASTM D7106/D7106M-05(2023) - Standard Guide for Selection of Test Methods for Ethylene Propylene Diene Terpolymer (EPDM) Geomembranes
Effective Date
23-Aug-2013
Referred By
ASTM D7005/D7005M-16 - Standard Test Method for Determining the Bond Strength (Ply Adhesion) of Geocomposites
Effective Date
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ASTM D5321/D5321M-13 - Standard Test Method for Determining the Shear Strength of Soil-Geosynthetic and Geosynthetic-Geosynthetic Interfaces by Direct ShearASTM D5321/D5321M-13 - Standard Test Method for Determining the Shear Strength of Soil-Geosynthetic and Geosynthetic-Geosynthetic Interfaces by Direct Shear
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REDLINE ASTM D5321/D5321M-13 - Standard Test Method for Determining the Shear Strength of Soil-Geosynthetic and Geosynthetic-Geosynthetic Interfaces by Direct ShearREDLINE ASTM D5321/D5321M-13 - Standard Test Method for Determining the Shear Strength of Soil-Geosynthetic and Geosynthetic-Geosynthetic Interfaces by Direct Shear
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Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: D5321/D5321M − 13
StandardTest Method for
Determining the Shear Strength of Soil-Geosynthetic and
1
Geosynthetic-Geosynthetic Interfaces by Direct Shear
This standard is issued under the fixed designation D5321/D5321M; 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.
Note—Editorial corrections were made to the units information, Section 3, and throughout the standard
on August 23, 2013.
1. Scope 2. Referenced Documents
2
1.1 This test method covers a procedure for determining the 2.1 ASTM Standards:
shear resistance of a geosynthetic against soil, or a geosyn- D653 Terminology Relating to Soil, Rock, and Contained
thetic against another geosynthetic, under a constant rate of Fluids
deformation. D698 Test Methods for Laboratory Compaction Character-
3
1.1.1 The test method is intended to indicate the perfor- istics of Soil Using Standard Effort (12 400 ft-lbf/ft (600
3
mance of the selected specimen by attempting to model certain kN-m/m ))
field conditions. Results obtained from this method may be D1557 Test Methods for Laboratory Compaction Character-
3
limited in their applicability to the specific conditions consid- istics of Soil Using Modified Effort (56,000 ft-lbf/ft
3
ered in the testing. (2,700 kN-m/m ))
D2435/D2435M Test Methods for One-Dimensional Con-
1.2 The test method is applicable for all geosynthetics, with
solidation Properties of Soils Using Incremental Loading
the exception of geosynthetic clay liners (GCLs) which are
D2487 Practice for Classification of Soils for Engineering
addressed in Test Method D6243/D6243M.
Purposes (Unified Soil Classification System)
1.3 The test method is not suited for the development of
D3080/D3080M Test Method for Direct Shear Test of Soils
exact stress-strain relationships for the test specimen due to the
Under Consolidated Drained Conditions
non-uniform distribution of shearing forces and displacement.
D3740 Practice for Minimum Requirements for Agencies
Engaged in Testing and/or Inspection of Soil and Rock as
1.4 The values stated in either SI units or inch-pound units
are to be regarded separately as standard. The values stated in Used in Engineering Design and Construction
D4354 Practice for Sampling of Geosynthetics and Rolled
each system may not be exact equivalents; therefore, each
system shall be used independently of the other. Combining Erosion Control Products(RECPs) for Testing
D4439 Terminology for Geosynthetics
values from the two systems may result in non-conformance
with the standard. D6243/D6243M Test Method for Determining the Internal
and Interface Shear Strength of Geosynthetic Clay Liner
1.5 This standard does not purport to address all the safety
by the Direct Shear Method
concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety and
3. Terminology
health practices and determine the applicability of regulatory
3.1 Definitions: For definitions of terms relating to soil and
limitations prior to use.
rock, refer to Terminology D653. For definitions of terms
relating to geosynthetics, refer to Terminology D4439.
1
This test method is under the jurisdiction of ASTM Committee D35 on
Geosynthetics and is the direct responsibility of Subcommittee D35.01 on Mechani-
2
cal Properties. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Aug. 23, 2013. Published September 2013. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 1992. Last previous edition approved in 2012 as D5321–12 DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/D5321_D5321M-13. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D5321/D5321M − 13
3.2 Definitions of Terms Specific to This Standard: 4. Summary of Test Method
3.2.1 adhesion, c ,n—the y-intercept of the Mohr-Coulomb
a
4.1 The shear resistance between a geosynthetic and a soil,
strength envelope.
or other material selected by the user, is determined by placing
3.2.2 atmosphere for testing geosynthetics, n—air main-
the geosynthetic and one or more contact surfaces, such as soil,
tained at a relative humidity between 50 and 70 % and
within a direct shear box. A constant normal stress represen-
temperature of 21 6 2°C [70 6 4°F].
tative of design stresses is applied to the specimen, and a
tangential (shear) force is applied to the apparatus so that one
3.2.3 Mohr-Coul
...

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: D5321 − 08 D5321/D5321M − 13
Standard Test Method for
Determining the Coefficient Shear Strength of Soil and
Geosynthetic or Geosynthetic and Geosynthetic Friction by
the Direct Shear MethodSoil-Geosynthetic and
1
Geosynthetic-Geosynthetic Interfaces by Direct Shear
This standard is issued under the fixed designation D5321;D5321/D5321M; 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.
Note—Editorial corrections were made to the units information, Section 3, and throughout the standard
on August 23, 2013.
1. Scope
1.1 This test method covers a procedure for determining the shear resistance of a geosynthetic against soil, or a geosynthetic
against another geosynthetic, under a constant rate of deformation.
1.1.1 The test method is intended to indicate the performance of the selected specimen by attempting to model certain field
conditions. Results obtained from this method may be limited in their applicability to the specific conditions considered in the
testing.
1.2 The test method is applicable for all geosynthetics. geosynthetics, with the exception of geosynthetic clay liners (GCLs)
which are addressed in Test Method D6243/D6243M.
1.3 The test method is not suited for the development of exact stress-strain relationships for the test specimen due to the
non-uniform distribution of shearing forces and displacement.
1.4 The values stated in either SI units or inch-pound units are to be regarded separately as the standard. The values given in
parentheses are for information only. stated in each system may not be exact equivalents; therefore, each system shall be used
independently of the other. Combining values from the two systems may result in non-conformance with the standard.
1.5 This standard does not purport to address all 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
2
2.1 ASTM Standards:
D653 Terminology Relating to Soil, Rock, and Contained Fluids
3 3
D698 Test Methods for Laboratory Compaction Characteristics of Soil Using Standard Effort (12 400 ft-lbf/ft (600 kN-m/m ))
3
D1557 Test Methods for Laboratory Compaction Characteristics of Soil Using Modified Effort (56,000 ft-lbf/ft (2,700
3
kN-m/m ))
D2435D2435/D2435M Test Methods for One-Dimensional Consolidation Properties of Soils Using Incremental Loading
D2487 Practice for Classification of Soils for Engineering Purposes (Unified Soil Classification System)
D3080D3080/D3080M Test Method for Direct Shear Test of Soils Under Consolidated Drained Conditions
D3740 Practice for Minimum Requirements for Agencies Engaged in Testing and/or Inspection of Soil and Rock as Used in
Engineering Design and Construction
D4354 Practice for Sampling of Geosynthetics and Rolled Erosion Control Products(RECPs) for Testing
D4439 Terminology for Geosynthetics
D6243/D6243M Test Method for Determining the Internal and Interface Shear Strength of Geosynthetic Clay Liner by the Direct
Shear Method
1
This test method is under the jurisdiction of ASTM Committee D35 on Geosynthetics and is the direct responsibility of Subcommittee D35.01 on Mechanical Properties.
Current edition approved July 1, 2008Aug. 23, 2013. Published August 2008September 2013. Originally approved in 1992. Last previous edition approved in 20022012
as D5321–02–12 DOI: 10.1520/D5321-08.10.1520/D5321_D5321M-13.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. 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 ----------------------
D5321/D5321M − 13
3. Terminology
3.1 Definitions: For definitions of terms relating to soil and rock, refer to Terminology D653. For definitions of terms relating
to geosynthetics, refer to Terminology D4439.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 adhesion, n— the shearing resistance between two adjacent materials under zero normal stress. Practically, this is
c
a
determine
...

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SCOPE
1.1 This practice provides a summary of equipment and procedures for ultrasonic testing of geomembranes using the pulse echo method.  
1.2 Ultrasonic wave propagation in solid materials is correlated to physical and mechanical properties and condition of the materials. In ultrasonic testing, two wave propagation characteristics are commonly determined: velocity (based on wave travel time measurements) and attenuation (based on wave amplitude measurements). Velocity of wave propagation is used to determine thickness, density, and elastic properties of materials. Attenuation of waves in solid materials is used to determine microstructural properties of the materials. In addition, frequency characteristics of waves are analyzed to investigate the properties of a test material. Travel time, amplitude, and frequency distribution measurements are used to assess the condition of materials to identify damage and defects in solid materials. Ultrasonic measurements are used to determine the nature of materials/media in contact with a test specimen as well. Measurements are conducted in the time-domain (time versus amplitude) or frequency-domain (frequency versus amplitude).  
1.3 Measurements of one or more ultrasonic wave transmission characteristics are made based on the requirements of the specific testing program.  
1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.5 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.  
1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development ...

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ASTM
ASTM D5101-23(Test Method)
Standard Test Method for Measuring the Filtration Compatibility of Soil-Geotextile Systems

SIGNIFICANCE AND USE
5.1 This test method is recommended for the evaluation of the performance of water-saturated soil-geotextile systems under unidirectional flow conditions. The results obtained may be used as an indication of the compatibility of the soil-geotextile system with respect to both particle retention and flow capacity.  
5.2 This test method is intended to evaluate the performance of specific on-site soils and geotextiles at the design stage of a project, or to provide qualitative data that may help identify causes of failure (for example, clogging, particle loss). It is not appropriate for acceptance testing of geotextiles. It is also improper to utilize the results from this test for job specifications or manufacturers' certifications.  
5.3 This test method is intended for site-specific investigation therefore is not an index property of the geotextile, and thus is not intended to be requested of the manufacturer or supplier of the geotextile.
SCOPE
1.1 This test method covers performance tests applicable for determining the compatibility of geotextiles with various types of water-saturated soils under unidirectional flow conditions.  
1.2 Two evaluation methods may be used to investigate soil-geotextile filtration behavior, depending on the soil type:  
1.2.1 For soils with a plasticity index lower than 5, the systems compatibility shall be evaluated per this standard.  
1.2.2 For soils with a plasticity index of 5 or more, it is recommended to use Test Method D5567 (‘HCR,’ Hydraulic Conductivity Ratio) instead of this test method.  
1.2.3 If the plasticity index of the soil is close to 5, the involved parties shall agree on the selection of the appropriate method prior to conducting the test. This task may require comparison of the permeability of the soil-geotextile system to the detection limits of the HCR and Gradient Ratio Test (GRT) test apparatus being used.  
1.3 The values stated in SI units are to be regarded as standard. The values 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.

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ASTM
ASTM D7747/D7747M-11(2023)(Test Method)
Standard Test Method for Determining Integrity of Seams Produced Using Thermo-Fusion Methods for Reinforced Geomembranes by the Strip Tensile Method

SIGNIFICANCE AND USE
4.1 The use of reinforced geomembranes as barrier materials has created a need for a standard test method to evaluate the quality of seams produced by thermo-fusion methods. This test method is used for quality control purposes and is intended to provide quality control and quality assurance personnel with data to evaluate seam quality.  
4.2 This standard arose from the need for a destructive test method for evaluating seams of reinforced geomembranes. Standards written for destructive testing of nonreinforced geomembranes do not include all break codes (Fig. 1) applicable to reinforced geomembranes.
FIG. 1 Break Codes for Dual Hot Wedge and Hot Air Seams of Reinforced Geomembranes Tested for Seam Strength in Shear and Peel Modes  
4.3 When reinforcement occurs in directions other than machine and cross-machine, scrim are cut at specimen edges, generally lowering results. To partially compensate for this, testing can be performed according to Test Method D7749 or the 2 in. wide strip specimen specified in this method can be utilized. Testing of 1 in. and 2 in. specimens is Method A and Method B, respectively.  
4.4 The shear test outlined in this method correlates to strength of parent material measured according to Test Method D7003/D7003M only if reinforcement is parallel to TD. For other materials, seam strength and parent material strength can be compared through Test Methods D7749 and D7004/D7004M. Values obtained with the strip methods shall not be compared to values obtained with grab methods.
SCOPE
1.1 This test method describes destructive quality control tests used to determine the integrity of thermo-fusion seams made with reinforced geomembranes. Test procedures are described for seam tests for peel and shear properties using strip specimens.  
1.2 The types of thermal field and factory seaming techniques used to construct geomembrane seams include the following:  
1.2.1 Hot Air—This technique introduces high-temperature air between two geomembrane surfaces to facilitate melting. Pressure is applied to the top or bottom geomembrane, forcing together the two surfaces to form a continuous bond.  
1.2.2 Hot Wedge—This technique melts the two geomembrane surfaces to be seamed by running a hot metal wedge between them. Pressure is applied to the top and bottom geomembrane to form a continuous bond. Some seams of this kind are made with dual tracks separated by a non-bonded gap. These seams are sometimes referred to as dual hot wedge seams or double-track seams.  
1.2.3 Extrusion—This technique encompasses extruding molten resin between two geomembranes or at the edge of two overlapped geomembranes to effect a continuous bond.  
1.2.4 Radio Frequency (RF) or Dielectric—High-frequency dielectric equipment is used to generate heat and pressure to form an overlap seam in factory fabrication.  
1.2.5 Impulse—Clamping bars heated by wires or a ribbon melt the sheets clamped between them. A cooling period while still clamped allows the polymer to solidify before being released.  
1.3 The types of materials covered by this test method include, but are not limited to, reinforced geomembranes made from the following polymers:  
1.3.1 Very low-density polyethylene (VLDPE).  
1.3.2 Linear low-density polyethylene (LLDPE).  
1.3.3 Flexible polypropylene (fPP).  
1.3.4 Polyvinyl chloride (PVC).  
1.3.5 Chlorosulfonated polyethylene (CSPE).  
1.3.6 Ethylene interpolymer alloy (EIA).  
1.4 Units—The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the standard.  
1.5 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 ap...

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ASTM
ASTM D6992-16(2023)(Test Method)
Standard Test Method for Accelerated Tensile Creep and Creep-Rupture of Geosynthetic Materials Based on Time-Temperature Superposition Using the Stepped Isothermal Method

SIGNIFICANCE AND USE
5.1 Use of the Stepped Isothermal Method decreases the time required for creep to occur and the obtaining of the associated data.  
5.2 The statements set forth in 1.6 are very important in the context of significance and use, as well as scope of the standard.  
5.3 Creep test data are used to calculate the creep modulus of materials as a function of time. These data are then used to predict the long-term creep deformation expected of geosynthetics used in reinforcement applications.
Note 1: Currently, SIM testing has focused mainly on woven and knitted geogrids and woven geotextiles made from polyester, aramid, polyaramid, poly-vinyl alcohol (PVA), and polypropylene yarns and narrow strips. Additional correlation studies on other materials are needed.  
5.4 Creep-rupture test data are used to develop a regression line relating creep stress to rupture time. These results predict the long-term rupture strength expected for geosynthetics in reinforcement applications.  
5.5 Tensile testing is used to establish the ultimate tensile strength (TULT) of a material and to determine elastic stress, strain, and variations thereof for SIM tests.  
5.6 Ramp and Hold (R+H) testing is done to establish the range of creep strains experienced in the brief period of very rapid response following the peak of the load ramp.
SCOPE
1.1 This test method covers accelerated testing for tensile creep, and tensile creep-rupture properties using the Stepped Isothermal Method (SIM).  
1.2 The test method is focused on geosynthetic reinforcement materials such as yarns, ribs of geogrids, or narrow geotextile specimens.  
1.3 The SIM tests are laterally unconfined tests based on time-temperature superposition procedures.  
1.4 Tensile tests are to be completed before SIM tests and the results are used to determine the stress levels for subsequent SIM tests defined in terms of the percentage of Ultimate Tensile Strength (TULT). Additionally, the tensile test can be designed to provide estimates of the initial elastic strain distributions appropriate for the SIM results.  
1.5 Ramp and Hold (R+H) tests may be completed in conjunction with SIM tests. They are designed to provide additional estimates of the initial elastic and initial rapid creep strain levels appropriate for the SIM results.  
1.6 This method can be used to establish the sustained load creep and creep-rupture characteristics of a geosynthetic. Results of this method are to be used to augment results of Test Method D5262 and may not be used as the sole basis for determination of long-term creep and creep-rupture behavior of geosynthetic material.  
1.7 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.8 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.  
1.9 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.

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ASTM
ASTM D7106/D7106M-05(2023)(Guide)
Standard Guide for Selection of Test Methods for Ethylene Propylene Diene Terpolymer (EPDM) Geomembranes

SIGNIFICANCE AND USE
4.1 This standard provides guidance to obtain data that is the most representative of the material’s characteristics and performance. To properly evaluate EPDM, tests should be performed in accordance with specific test methods and procedures.
SCOPE
1.1 This guide covers and provides recommendations for the selection of appropriate test methods for Ethylene Propylene Diene Terpolymer (EPDM) geomembranes used in geotechnical and geoenvironmental applications.  
1.2 This guide includes test methods for three different types of EPDM geomembranes including: scrim-reinforced membranes, composite membranes, and smooth, nonreinforced membranes.  
1.3 The test methods are divided into three categories including manufacturing quality control, optional performance tests, and seam testing.  
1.4 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.  
1.5 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.  
1.6 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.

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