ASTM D6575-14a

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.

General Information

• Status: Historical
• Publication Date: 31-Jul-2014
• ICS: 65.020.20 - Plant growing
• Technical Committee: D35 - Geosynthetics
• Drafting Committee: D35.05 - Geosynthetic Erosion Control

Relations

• Replaces: ASTM D6575-14 - Standard Test Method for Determining Stiffness of Geosynthetics Used as Turf Reinforcement Mats (TRMs)
• Effective Date: 01-Aug-2014

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: D6575 − 14a
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. Terminology
1.1 This test method covers the determination of the stiff- 3.1 Definitions of Terms Specific to This Standard:
nessofgeosyntheticsusedasTurfReinforcementMats(TRM). 3.1.1 bending length, n:
3.1.1.1 general, adj—a measure of the interaction between
1.2 The method is applicable to TRMs of any fiber content
geosyntheticweightandgeosyntheticstiffnessasshownbythe
and any number of components.
way in which a geosynthetic bends under its own weight. It
1.3 The values stated in inch-pound units are to be regarded
reflects the stiffness of a geosynthetic when bent in one plane
as standard. The values given in parentheses are mathematical
under the force of gravity, and is one component of drape.
conversions to SI units that are provided for information only
3.1.1.2 Discussion—Bending length is called drape stiffness
and are not considered standard.
in Federal Specification CCC-T-191b.
1.4 This standard does not purport to address all of the
3.1.1.3 specific, adj—the cube root of the ratio of the
safety concerns, if any, associated with its use. It is the flexural rigidity to the mass per unit area.
responsibility of the user of this standard to establish appro-
3.1.2 flexural rigidity, n:
priate safety and health practices and determine the applica- 3.1.2.1 general, adj—resistance to bending.
bility of regulatory limitations prior to use.
3.1.2.2 Discussion—Resistance to bending or “flexural ri-
gidity” is called flex stiffness in Federal Specification CCC-T-
2. Referenced Documents
191b.
2
2.1 ASTM Standards:
3.1.2.3 specific, adj—thecoupleoneitherendofasampleof
D123Terminology Relating to Textiles
unit width bent into unit curvature in the absence of any
D1388Test Method for Stiffness of Fabrics
tension.
D1776Practice for Conditioning and Testing Textiles
3.1.2.4 Discussion—The methods measure the bending
D4354Practice for Sampling of Geosynthetics and Rolled
length. Flexural rigidity is calculated directly by multiplying
Erosion Control Products(RECPs) for Testing
the cube of the bending length by the weight per unit area (see
D4439Terminology for Geosynthetics
3.1.1.3).
D5261Test Method for Measuring Mass per Unit Area of
3.1.3 stiffness, n—resistance to bending.
Geotextiles
3.2 Definitions—For definitions of other textile or geosyn-
E177Practice for Use of the Terms Precision and Bias in
thetic terms used in this test method, refer to Terminologies
ASTM Test Methods
D123 and D4439.
E691Practice for Conducting an Interlaboratory Study to
Determine the Precision of a Test Method
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
D1388).
1
This test method is under the jurisdiction of ASTM Committee D35 on
4.2 The cantilever test method may not be suitable for
Geosynthetics and is the direct responsibility of Subcommittee D35.05 on Geosyn-
thetic Erosion Control.
testing products that are very limp or have a marked tendency
Current edition approved Aug. 1, 2014. Published September 2014. Originally
to curl or twist at a cut edge.
approved in 2000. Last previous edition approved in 2014 as D6575–14. DOI:
10.1520/D6575-14A.
Cantilever Method
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on 5. Summary of Method
the ASTM website.
3 5.1 Aspecimen of the TRM is slid in a direction parallel to
AvailablefromU.S.GovernmentPrintingOfficeSuperintendentofDocuments,
732 N. Capitol St., NW, Washington, DC 20401, http://www.gpo.gov. its long dimension, so that its end projects from the edge of a
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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D6575 − 14a
horizontal surface. The length of overhang is measured when 9.3 Placeaspecimenontheplatformwiththeweightontop
the tip of the test specimen is depressed under its own weight of it so that the leading edges coincide. Holding weight in a
to the point where the line joining the tip to the edge of the horizontal plane, slide the specimen and weight slowly and
platform makes an
...

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 − 14 D6575 − 14a
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
E177 Practice for Use of the Terms Precision and Bias in ASTM Test Methods
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
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.
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 March 15, 2014Aug. 1, 2014. Published April 2014September 2014. Originally approved in 2000. Last previous edition approved in 20062014
as D6575 – 00D6575(2006). –14. DOI: 10.1520/D6575-14.10.1520/D6575-14A.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Available from U.S. Government Printing Office Superintendent of Documents, 732 N. Capitol St., NW, Washington, DC 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 − 14a
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).
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 e
...