ASTM D7179-07
(Test Method)Standard Test Method for Determining Geonet Breaking Force
Standard Test Method for Determining Geonet Breaking Force
SIGNIFICANCE AND USE
This method evaluates tensile breaking force of geonets for the purposes of quality control and quality assurance. Testing is performed parallel to the machine direction only for that is the primary direction that geonets witnesses tensile loading. This method is an index test and is not intended for design purposes.
SCOPE
1.1 This test method is used to measure the breaking force of a Geonet.
1.2 This test is applicable for manufacturing quality control (MQC) and construction quality assurance (CQA) testing and is not recommended as a performance test.
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.
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Designation:D7179–07
Standard Test Method for
1
Determining Geonet Breaking Force
This standard is issued under the fixed designation D 7179; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope 3.1.2 geonet, n—a geosynthetic consisting of integrally
connected parallel sets of ribs overlying similar sets at various
1.1 This test method is used to measure the breaking force
angles for planar drainage of liquids or gases.
of a Geonet.
3.1.3 index test, n—a test procedure which may contain a
1.2 This test is applicable for manufacturing quality control
known bias but which may be used to establish an order for a
(MQC) and construction quality assurance (CQA) testing and
set of specimens with respect to the property of interest.
is not recommended as a performance test.
3.1.4 peak load, n—maximum force recorded during a
1.3 The values stated in SI units are to be regarded as
tensile test.
standard. The values given in parentheses are for information
only.
4. Summary of Test Method
1.4 This standard does not purport to address all of the
4.1 Geonet specimens are mounted between full width grips
safety concerns, if any, associated with its use. It is the
in a load frame. Tensile load is applied longitudinally to the
responsibility of the user of this standard to establish appro-
specimen at a constant rate of crosshead movement. The test is
priate safety and health practices and determine the applica-
carried to rupture and a maximum breaking force of each
bility of regulatory limitations prior to use.
specimen is recorded.
2. Referenced Documents
5. Significance and Use
2
2.1 ASTM Standards:
5.1 This method evaluates tensile breaking force of geonets
D 4354 Practice for Sampling of Geosynthetics
for the purposes of quality control and quality assurance.
D 4439 Terminology for Geosynthetics
Testing is performed parallel to the machine direction only for
3. Terminology that is the primary direction that geonets witnesses tensile
loading. This method is an index test and is not intended for
3.1 Definitions—Definitions of terms applying to this test
design purposes.
method appear in Terminology D 4439.
3.1.1 atmosphere for testing geosynthetics, n—air main-
6. Apparatus
tained at a relative humidity between 50 to 70 % and a
6.1 Tensile Testing Machine—Constant Rate of Extension
temperature of 21 6 2°C (70 6 4°F).
(CRE) equipment meeting the requirements of Specification
D 76. The load cell shall be accurate to within 61 % of the
applied force.The drive mechanism shall be able to control the
1
This test method is under the jurisdiction of ASTM Committee D35 on
rate of extension to within 61 % of the targeted rate.
Geosynthetics and is the direct responsibility of Subcommittee D35.01 on Mechani-
6.2 Grips—One of the grips must be self aligning to
cal Properties.
compensate for uneven distribution of force across the speci-
Current edition approved Dec. 1, 2007. Published December 2007. Originally
approved in 2005. Last previous edition approved in 2005 as D7179–05.
men. The clamping force and the clamp surfaces shall hold the
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
specimen firmly without causing damage. The clamps shall be
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
capable of gripping a 100 mm (4 in.) by 25 mm (1 in.) area at
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. a minimum.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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D7179–07
6.3 Recording Mechanism—The testing machine shall be 9.2 Clamp a specimen so that it is centered in both sets of
equipped with equipment capable of producing a hard copy of clamps and aligned vertically about the centroid of the tensile
the force versus displacement curve. Electronic data acquisi- testing machine.This is a critical point since the breaking force
tion with printer capabilities or direct recording devices is is significantly altered if the specimen is not aligned.
acceptable.
9.3 Elongate the specimen at a test speed of 300 mm/min
(12 in./min) until the specimen has ruptured. If the specimen
7. Sampling and Test Specs and Units
slips in the clamps, breaks in the clamps, breaks at the edges of
the clamps, or if for any reason attributable to faulty operation,
7.1 Lot Sample—For the lot sample, take rolls of geonet per
theresultfallsmarkedlybelowtheaverage(outliersaredefined
the applicable project specification, or as agreed
...
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:D7179–05 Designation:D7179–07
Standard Test Method for
1
Determining Geonet Breaking Force
This standard is issued under the fixed designation D 7179; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 This test method is used to measure the breaking force of a Geonet.
1.2 This test is applicable for manufacturing quality control (MQC) and construction quality assurance (CQA) testing and is not
recommended as a performance test.
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.
2. Referenced Documents
2
2.1 ASTM Standards:
D 4354 Practice for Sampling of Geosynthetics
D 4439 Terminology for Geosynthetics
3. Terminology
3.1 Definitions—Definitions of terms applying to this test method appear in Terminology D 4439.
3.1.1 atmosphere for testing geosynthetics, n—air maintained at a relative humidity between 50 to 70 % and a temperature of
21 6 2°C (70 6 4°F).
3.1.2 geonet, n—a geosynthetic consisting of integrally connected parallel sets of ribs overlying similar sets at various angles
for planar drainage of liquids or gases.
3.1.3 index test, n—a test procedure which may contain a known bias but which may be used to establish an order for a set of
specimens with respect to the property of interest.
3.1.4 peak load, n—maximum force recorded during a tensile test.
4. Summary of Test Method
4.1 Geonet specimens are mounted between full width grips in a load frame. Tensile load is applied longitudinally to the
specimen at a constant rate of crosshead movement.The test is carried to rupture and a maximum breaking force of each specimen
is recorded.
5. Significance and Use
5.1 This method evaluates tensile breaking force of geonets for the purposes of quality control and quality assurance. Testing
is performed parallel to the machine direction only for that is the primary direction that geonets witnesses tensile loading. This
method is an index test and is not intended for design purposes.
6. Apparatus
6.1 Tensile Testing Machine—Constant Rate of Extension (CRE) equipment meeting the requirements of Specification D 76.
The load cell shall be accurate to within 61 % of the applied force. The drive mechanism shall be able to control the rate of
extension to within 61 % of the targeted rate.
6.2 Grips—One of the grips must be self aligning to compensate for uneven distribution of force across the specimen. The
1
This test method is under the jurisdiction ofASTM Committee D35 on Geosynthetics and is the direct responsibility of Subcommittee D35.01 on Mechanical Properties
of Geosynthetics.
Current edition approved June 1, 2005. Published July 2005.
1
This test method is under the jurisdiction ofASTM Committee D35 on Geosynthetics and is the direct responsibility of Subcommittee D35.01 on Mechanical Properties.
Current edition approved Dec. 1, 2007. Published December 2007. Originally approved in 2005. Last previous edition approved in 2005 as D7179–05.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM 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 ----------------------
D7179–07
clamping force and the clamp surfaces shall hold the specimen firmly without causing damage. The clamps shall be capable of
gripping a 100 mm (4 in.) by 25 mm (1 in.) area at a minimum.
6.3 Recording Mechanism—The testing machine shall be equipped with equipment capable of producing a hard copy of the
force versus displacement curve. Electronic data acquisition with printer capabilities or direct recording devices is acceptable.
7. Sampling and Test Specs and Units
7.1 Lot Sample—For the lot sample, take rolls of geonet per the applicable project specification, or as agreed upon between
purchaser and
...
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