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ASTM D5641-94(2011)

(Practice)

Standard Practice for Geomembrane Seam Evaluation by Vacuum Chamber

Standard Practice for Geomembrane Seam Evaluation by Vacuum Chamber

SIGNIFICANCE AND USE
This practice is a nondestructive evaluation intended to be used for quality control purposes during factory or field seaming of geomembranes.
This practice may also be used to evaluate geomembrane panels for holes that penetrate the entire thickness of material. Limitations on the test practice are that it may not be suitable for uneven or curved surfaces, thick seams, seams in corners, and thin extensible geomembranes.
SCOPE
1.1 This practice covers procedures to perform nondestructive quality control testing described in Practice D4437 and D4545 for evaluating the continuity of all types of geomembrane seams using the bubble emission or vacuum chamber method.
1.2 The technique described in this practice is intended for use on geomembrane seams, patches, and defects.
1.3 The values stated in SI units are to be regarded as standard. The values 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 health practices and determine the applicability of regulatory limitations prior to use.

General Information

Status
Historical
Publication Date
31-May-2011
ICS
59.080.70 - Geotextiles
Technical Committee
D35 - Geosynthetics
Drafting Committee
D35.10 - Geomembranes
Current Stage
Ref Project

Relations

Replaces
ASTM D5641-94(2006) - Standard Practice for Geomembrane Seam Evaluation by Vacuum Chamber
Effective Date
01-Jun-2011
Replaced By
ASTM D5641/D5641M-16 - Standard Practice for Geomembrane Seam Evaluation by Vacuum Chamber
Effective Date
01-Jul-2016

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ASTM D5641-94(2011) - Standard Practice for Geomembrane Seam Evaluation by Vacuum ChamberASTM D5641-94(2011) - Standard Practice for Geomembrane Seam Evaluation by Vacuum Chamber
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ASTM D5641-94(2011) - Standard Practice for Geomembrane Seam Evaluation by Vacuum Chamber
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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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: D5641 − 94(Reapproved 2011)
Standard Practice for
1
Geomembrane Seam Evaluation by Vacuum Chamber
This standard is issued under the fixed designation D5641; 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. Terminology
1.1 This practice covers procedures to perform nondestruc- 3.1 Definitions of Terms Specific to This Standard:
tive quality control testing described in Practice D4437 and
3.1.1 geomembrane, n—anessentiallyimpermeablegeosyn-
D4545 for evaluating the continuity of all types of geomem-
thetic composed of one or more synthetic sheets. (See Termi-
brane seams using the bubble emission or vacuum chamber
nology D4439).
method.
3.1.2 seam, n—the connection of two or more pieces of
1.2 The technique described in this practice is intended for
material by mechanical, chemical, or fusion methods to pro-
use on geomembrane seams, patches, and defects.
vide the integrity of a single piece of the material.
1.3 The values stated in SI units are to be regarded as
3.1.3 vacuum chamber, n—a device that allows a vacuum to
standard. The values given in parentheses are for information
be applied to a surface.
only.
3.1.3.1 Discussion—Ingeomembranes,typicalseamswould
1.4 This standard does not purport to address all of the
include adhesive bonded, bodied chemical fusion welds;
safety concerns, if any, associated with its use. It is the
chemical fusion welds; dielectric; dual hot wedge; fillet extru-
responsibility of the user of this standard to establish appro-
sion; flat extrusion; hot air; single hot wedge; and ultrasonic.
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use. (See EPA/530/SW-91/051.)
NOTE 1—For definition of other terms used in this practice, refer to
2. Referenced Documents
Terminology D4439.
2
2.1 ASTM Standards:
D4437 Practice for Non-destructive Testing (NDT) for De-
4. Summary of Practice
termining the Integrity of Seams Used in Joining Flexible
4.1 The basic principle of this practice consists of creating a
Polymeric Sheet Geomembranes
pressuredifferentialacrossaseamandobservingforbubblesin
D4439 Terminology for Geosynthetics
a film of foaming solution over the low pressure side, within
D4545 Practice for Determining the Integrity of Factory
the vacuum chamber. The vacuum chamber has a viewing port
Seams Used in Joining Manufactured Flexible Sheet
3
Geomembranes (Withdrawn 2008) that allows observation of the seam area being tested. The
E515 Practice for Leaks Using Bubble Emission Techniques foaming solution is applied to the surface to be tested and the
vacuum chamber is placed over the test area. As the chamber
2.2 E.P.A. Documents:
EPA/530/SW-91/051 Inspection Techniques for the Fabri- is held firmly in place, vacuum is applied.Air leakage through
4
cation of Geomembrane Field Seams flaws in the test area cause bubbles in the foaming solution that
may be observed.
1
This practice is under the jurisdiction of ASTM Committee D35 on Geosyn- 5. Significance and Use
thetics and is the direct responsibility of Subcommittee D35.10 on Geomembranes.
CurrenteditionapprovedJune1,2011.PublishedJuly2011.Originallyapproved 5.1 This practice is a nondestructive evaluation intended to
in 1994. Last previous edition approved in 2006 as D5641 – 94 (2006). DOI:
be used for quality control purposes during factory or field
10.1520/D5641-94R11.
seaming of geomembranes.
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
5.2 This practice may also be used to evaluate geomem-
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. brane panels for holes that penetrate the entire thickness of
3
The last approved version of this historical standard is referenced on
material. Limitations on the test practice are that it may not be
www.astm.org.
4 suitable for uneven or curved surfaces, thick seams, seams in
Available from the Superintendent of Documents, U.S. Government Printing
Office, Washington, DC 20402. corners, and thin extensible geomembranes.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D5641 − 94 (2011)
6. Apparatus 7. Procedure
6.1 Vacuum Pump—The vacuum pump shall be fuel or 7.1 Theareaoftheseamtobeevaluatedshouldbecleanand
electric powered and capable of sustaining the required free of soil or foreign objects that might prohibit a good seal
vacuum for the dura
...

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5.1 The increased use of geomembranes as barrier materials to restrict liquid or gas movement, and the common use of dual-track seams in joining these sheets, has created a need for a standard nondestructive test by which the quality of the seams can be assessed for continuity and watertightness. The test is not intended to provide any indication of the physical strength of the seam.  
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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.  
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Standard Test Method for Accelerated Tensile Creep and Creep-Rupture of Geosynthetic Materials Based on Time-Temperature Superposition Using the Stepped Isothermal Method

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5.1 Use of the Stepped Isothermal Method decreases the time required for creep to occur and the obtaining of the associated data.  
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SCOPE
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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 D5322-23(Practice)
Standard Practice for Laboratory Immersion Procedures for Evaluating the Chemical Resistance of Geosynthetics to Liquids

SIGNIFICANCE AND USE
4.1 This practice provides a standard immersion procedure for investigating the chemical resistance of a geosynthetic to a liquid waste, leachate, or chemical in a laboratory environment. The conditions specified in this practice are intended both to provide a basis of standardization and to serve as a guide for those wishing to compare or investigate the chemical resistance of a geosynthetic material(s) in a laboratory environment. Practice D5496 can be used should the user need to assess the performance of a geosynthetic in field conditions.  
4.2 This practice is not intended to establish, by itself, the behavior of geosynthetics when exposed to liquids. Such behavior, referred to as chemical resistance, can be defined only in terms of specific chemical solutions and methods of testing and evaluation criteria selected by the user.
SCOPE
1.1 This practice covers laboratory immersion procedures for the testing of geosynthetics for chemical resistance to liquid wastes, prepared chemical solutions, and leachates derived from solid wastes.  
1.2 This standard is not applicable to some geosynthetics such as geosynthetic clay liners (GCLs), because of their composite nature requiring a confining pressure during immersion. However, individual geosynthetic components of the GCL can be tested.  
1.3 This standard was originally developed to supplement and expand EPA 9090 to include all geosynthetics. EPA 9090 has not been updated since 1992.  
1.4 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.  
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. For specific hazards statements, see Section 7.  
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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