ASTM D6575-14
(Test Method)Standard Test Method for Determining Stiffness of Geosynthetics Used as Turf Reinforcement Mats (TRMs)
Standard Test Method for Determining Stiffness of Geosynthetics Used as Turf Reinforcement Mats (TRMs)
SIGNIFICANCE AND USE
4.1 In general this test method is adapted from tests developed for woven fabrics (previously designated as Test Method D1388).
4.2 The cantilever test method may not be suitable for testing products that are very limp or have a marked tendency to curl or twist at a cut edge.
SCOPE
1.1 This test method covers the determination of the stiffness of geosynthetics used as Turf Reinforcement Mats (TRM).
1.2 The method is applicable to TRMs of any fiber content and any number of components.
1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
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: D6575 − 14
StandardTest Method for
Determining Stiffness of Geosynthetics Used as Turf
1
Reinforcement Mats (TRMs)
This standard is issued under the fixed designation D6575; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 3.1.1.1 general, adj—a measure of the interaction between
geosyntheticweightandgeosyntheticstiffnessasshownbythe
1.1 This test method covers the determination of the stiff-
way in which a geosynthetic bends under its own weight. It
nessofgeosyntheticsusedasTurfReinforcementMats(TRM).
reflects the stiffness of a geosynthetic when bent in one plane
1.2 The method is applicable to TRMs of any fiber content
under the force of gravity, and is one component of drape.
and any number of components.
3.1.1.2 Discussion—Bending length is called drape stiffness
1.3 The values stated in inch-pound units are to be regarded in Federal Specification CCC-T-191b.
3.1.1.3 specific, adj—the cube root of the ratio of the
as standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only flexural rigidity to the mass per unit area.
3.1.2 flexural rigidity, n:
and are not considered standard.
3.1.2.1 general, adj—resistance to bending.
1.4 This standard does not purport to address all of the
3.1.2.2 Discussion—Resistance to bending or “flexural ri-
safety concerns, if any, associated with its use. It is the
gidity” is called flex stiffness in Federal Specification CCC-T-
responsibility of the user of this standard to establish appro-
191b.
priate safety and health practices and determine the applica-
3.1.2.3 specific, adj—thecoupleoneitherendofasampleof
bility of regulatory limitations prior to use.
unit width bent into unit curvature in the absence of any
2. Referenced Documents
tension.
2
3.1.2.4 Discussion—The methods measure the bending
2.1 ASTM Standards:
length. Flexural rigidity is calculated directly by multiplying
D123Terminology Relating to Textiles
the cube of the bending length by the weight per unit area (see
D1388Test Method for Stiffness of Fabrics
3.1.1.3).
D1776Practice for Conditioning and Testing Textiles
3.1.3 stiffness, n—resistance to bending.
D4354Practice for Sampling of Geosynthetics and Rolled
3.2 Definitions—For definitions of other textile or geosyn-
Erosion Control Products(RECPs) for Testing
thetic terms used in this test method, refer to Terminologies
D4439Terminology for Geosynthetics
D123 and D4439.
D5261Test Method for Measuring Mass per Unit Area of
Geotextiles
4. Significance and Use
3
2.2 Federal Standards:
4.1 In general this test method is adapted from tests devel-
CCC-T-191bTextile Test Methods No. 5206.2
oped for woven fabrics (previously designated as Test Method
3. Terminology
D1388).
3.1 Definitions of Terms Specific to This Standard:
4.2 The cantilever test method may not be suitable for
3.1.1 bending length, n:
testing products that are very limp or have a marked tendency
to curl or twist at a cut edge.
1
This test method is under the jurisdiction of ASTM Committee D35 on
Cantilever Method
Geosynthetics and is the direct responsibility of Subcommittee D35.05 on Geosyn-
thetic Erosion Control.
5. Summary of Method
Current edition approved March 15, 2014. Published April 2014. Originally
approved in 2000. Last previous edition approved in 2006 as D6575–00(2006).
5.1 Aspecimen of the TRM is slid in a direction parallel to
DOI: 10.1520/D6575-14.
2
its long dimension, so that its end projects from the edge of a
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
horizontal surface. The length of overhang is measured when
Standards volume information, refer to the standard’s Document Summary page on
the tip of the test specimen is depressed under its own weight
the ASTM website.
3 to the point where the line joining the tip to the edge of the
AvailablefromU.S.GovernmentPrintingOfficeSuperintendentofDocuments,
732 N. Capitol St., NW, Washington, DC 20401, http://www.gpo.gov. platform makes an angle of 41.5° with the horizontal. One half
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
D6575 − 14
of this length is the bending length of the specimen. The cube steadily until the leading edges project beyond the edge of the
of this quantity multiplied by the weight per unit area of the platform. With the eye in a position so that the two inclined
geosynthetic is the flexural rigidity. lines
...
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: D6575 − 00 (Reapproved 2006) D6575 − 14
Standard Test Method for
Determining Stiffness of Geosynthetics Used as Turf
1
Reinforcement Mats (TRMs)
This standard is issued under the fixed designation D6575; 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 stiffness of geosynthetics used as Turf Reinforcement Mats (TRM).
1.2 The method is applicable to TRMs of any fiber content and any number of components.
1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only and are not considered standard.
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:
D123 Terminology Relating to Textiles
D1388 Test Method for Stiffness of Fabrics
D1776 Practice for Conditioning and Testing Textiles
D4354 Practice for Sampling of Geosynthetics and Rolled Erosion Control Products(RECPs) for Testing
D4439 Terminology for Geosynthetics
D5261 Test Method for Measuring Mass per Unit Area of Geotextiles
3
2.2 Federal Standards:
CCC-T-191b Textile Test Methods No. 5206.2
3. Terminology
3.1 Definitions of Terms Specific to This Standard:
3.1.1 bending length, n:
3.1.1.1 general, adj—a measure of the interaction between geosynthetic weight and geosynthetic stiffness as shown by the way
in which a geosynthetic bends under its own weight. It reflects the stiffness of a geosynthetic when bent in one plane under the
force of gravity, and is one component of drape.
3.1.1.2 Discussion—Bending length is called drape stiffness in Federal Specification CCC-T-191b.
3.1.1.3 specific, adj—the cube root of the ratio of the flexural rigidity to the mass per unit area.
3.1.2 flexural rigidity, n:
3.1.2.1 general, adj—resistance to bending.
3.1.2.2 Discussion—Resistance to bending or “flexural rigidity” is called flex stiffness in Federal Specification CCC-T-191b.
3.1.2.3 specific, adj—the couple on either end of a sample of unit width bent into unit curvature in the absence of any tension.
3.1.2.4 Discussion—The methods measure the bending length. Flexural rigidity is calculated directly by multiplying the cube
of the bending length by the weight per unit area (see 3.1.1.3).
1
This test method is under the jurisdiction of ASTM Committee D35 on Geosynthetics and is the direct responsibility of Subcommittee D35.05 on Geosynthetic Erosion
Control.
Current edition approved June 1, 2006March 15, 2014. Published June 2006April 2014. Originally approved in 2000. Last previous edition approved in 20002006 as
D6575 – 00.D6575 – 00(2006). DOI: 10.1520/D6575-00R06.10.1520/D6575-14.
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.
3
Available from the U.S. Government Printing Office Superintendent of Documents, US Government Printing Office, 732 N. Capitol St., NW, Washington, DC
20402.20401, http://www.gpo.gov.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
D6575 − 14
3.1.3 stiffness, n—resistance to bending.
3.2 Definitions—For definitions of other textile or geosynthetic terms used in this test method, refer to Terminologies D123 and
D4439.
4. Significance and Use
4.1 In general this test method is adapted from tests developed for woven fabrics (previously designated as Test Method D1388).
4.2 The cantilever test method may not be suitable for testing products that are very limp or have a marked tendency to curl
or twist at a cut edge.
Cantilever Method
5. Summary of Method
5.1 A specimen of the TRM is slid in a direction parallel to its long dimension, so that its end projects from the edge of a
horizontal surface. The length of overhang is measured when the tip of the test specimen is depressed under
...
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