ASTM D6524/D6524M-16(2021)

Standard Test Method for Measuring the Resiliency of Turf Reinforcement Mats (TRMs)

SIGNIFICANCE AND USE
5.1 Resiliency may be used to control the quality of many TRMs. Resiliency may be indicative of a TRM's ability to retain original configuration after exposure to the stresses which may be exerted during manufacture, shipping, and installation. Resiliency is not generally indicative of field performance.  
5.2 The resiliency of TRMs may vary considerably depending on the pressure applied to the specimen during loading cycles. To minimize variation, specific sample size and applied pressure are indicated in this test method to ensure all results are comparable.  
5.3 To determine the effect of different pressure loadings on the final thickness of TRMs, use this test method.  
5.4 This test method may be used for acceptance testing of commercial shipments of TRMs, but caution is advised since information on between-laboratory precision is incomplete. Comparative tests in accordance with 5.4.1 may be advisable.  
5.4.1 In a case of a dispute arising from differences in reported test results when using this test method for acceptance testing of commercial shipments, the purchaser and the supplier should conduct comparative tests to determine if there is a statistical bias between their laboratories. Competent statistical assistance is recommended for the investigation of bias. As a minimum, the two parties should take a group of test specimens that are as homogeneous as possible and that are formed from a lot of material of the type in question. The test specimens should be randomly assigned in equal numbers to each laboratory for testing. The average results from the two laboratories should be compared using Student's t-test for unpaired data and an acceptable probability level chosen by the two begun. If bias is found, either its cause must corrected, or the purchaser and be found and interpret future tests in supplier must agree to the light of the known bias.
Note 1: The user should be aware that the compressibility of the materials, their rebound characterist...
SCOPE
1.1 This test method covers the resiliency or recovery of turf reinforcement mats (TRMs) after they have been subjected to three cycles of loading at 689 kPa [100 psi] for 1 min/per cycle.  
1.2 This test method does not provide resiliency values for TRMs under variable normal compressive stresses. This test method determines nominal resiliency.  
1.3 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.  
1.4 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.

General Information

• Status: Published
• Publication Date: 30-Apr-2021
• ICS: 65.020.20 - Plant growing
• Technical Committee: D35 - Geosynthetics
• Drafting Committee: D35.05 - Geosynthetic Erosion Control

Relations

• Refers: ASTM D4439-24 - Standard Terminology for Geosynthetics
• Effective Date: 01-Feb-2024
• Refers: ASTM D4354-12(2020) - Standard Practice for Sampling of Geosynthetics and Rolled Erosion Control Products (RECPs) for Testing
• Effective Date: 01-May-2020
• Refers: ASTM D4439-18 - Standard Terminology for Geosynthetics
• Effective Date: 15-Apr-2018
• Refers: ASTM D4439-17 - Standard Terminology for Geosynthetics
• Effective Date: 01-Aug-2017
• Refers: ASTM D123-17 - Standard Terminology Relating to Textiles
• Effective Date: 01-Mar-2017
• Refers: ASTM D123-15b - Standard Terminology Relating to Textiles
• Effective Date: 15-Sep-2015
• Refers: ASTM D123-15a - Standard Terminology Relating to Textiles
• Effective Date: 01-Sep-2015
• Refers: ASTM D4439-15a - Standard Terminology for Geosynthetics
• Effective Date: 01-Sep-2015
• Refers: ASTM D4439-15 - Standard Terminology for Geosynthetics
• Effective Date: 01-Jul-2015
• Refers: ASTM D123-15 - Standard Terminology Relating to Textiles
• Effective Date: 01-Apr-2015
• Refers: ASTM D4439-14 - Standard Terminology for Geosynthetics
• Effective Date: 01-Mar-2014
• Refers: ASTM D123-13ae1 - Standard Terminology Relating to Textiles
• Effective Date: 15-Jun-2013
• Refers: ASTM D123-13a - Standard Terminology Relating to Textiles
• Effective Date: 15-Jun-2013
• Refers: ASTM D123-13 - Standard Terminology Relating to Textiles
• Effective Date: 15-May-2013
• Refers: ASTM D4354-12 - Standard Practice for Sampling of Geosynthetics and Rolled Erosion Control Products(RECPs) for Testing
• Effective Date: 01-Jul-2012

Overview

ASTM D6524/D6524M-16(2021), titled Standard Test Method for Measuring the Resiliency of Turf Reinforcement Mats (TRMs), is an internationally recognized standard developed by ASTM International. Its primary purpose is to define a test method for determining the resiliency or recovery properties of Turf Reinforcement Mats (TRMs) after being subjected to specified compressive load cycles. Resiliency, as measured by this method, helps assess a TRM’s ability to return to its original configuration following the stresses encountered during manufacturing, shipping, and installation.

This standard ensures that results are comparable by mandating specific sample sizes, loading pressures, and testing conditions. It is widely used within the erosion control, geosynthetics, and landscaping industries to control product quality and facilitate acceptance testing of commercial shipments.

Key Topics

• Resiliency Measurement
  The standard outlines how to measure the recovery thickness of TRMs after three loading cycles at 689 kPa [100 psi] for 1 minute each, providing a consistent basis for comparing different products.

• Test Method Consistency
  By prescribing detailed procedures for sample preparation, loading, and measurement conditions, ASTM D6524/D6524M-16(2021) ensures results are reliable and repeatable, minimizing variability across laboratories.

• Nominal Resiliency
  The method focuses on nominal, rather than field, resiliency values, giving a standardized indication of product quality, though not necessarily predictive of in-service performance.

• Comparative Testing
  Guidance is provided for resolving discrepancies in acceptance testing, recommending comparative tests and statistical analysis, such as Student's t-test, for dispute resolution.

Applications

• Quality Assurance for TRMs

  • Manufacturers, suppliers, and buyers use this test method to verify that TRMs meet consistency and quality requirements before shipping or installation.
  • Ensures that turf reinforcement mats can withstand handling, shipping, and installation without permanent deformation.

• Regulatory Compliance

  • Helps organizations demonstrate adherence to internationally recognized testing procedures for erosion control products.
  • Supports due diligence in projects that specify ASTM standards for product acceptance.

• Comparative Product Evaluation

  • Provides a consistent, reproducible measurement for resiliency, enabling fair performance comparisons between TRMs from different manufacturers or production lots.

• Dispute Resolution

  • Offers structured procedures for sample selection and comparative testing when disputes arise regarding acceptance of commercial shipments.

Related Standards

• ASTM D123 - Terminology Relating to Textiles: Provides definitions for textile-related terms that are referenced in this test method.
• ASTM D4354 - Practice for Sampling of Geosynthetics and Rolled Erosion Control Products (RECPs) for Testing: Gives procedures for sampling geosynthetic materials.
• ASTM D4439 - Terminology for Geosynthetics: Supplies terminology used in geotextiles and related standards.

Practical Value

By following ASTM D6524/D6524M-16(2021), industry professionals can reliably measure and report the resiliency of turf reinforcement mats, ensuring product consistency and compliance with project specifications. Consistent application of this standard enhances quality assurance, facilitates fair supplier comparisons, and supports project success in erosion control and landscaping applications.

Keywords: ASTM D6524, turf reinforcement mat, TRM resiliency, erosion control, quality testing, geosynthetics, ASTM standards, commercial shipment acceptance, material recovery, compressive load testing

Standards Content (Sample)

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.
Designation: D6524/D6524M − 16 (Reapproved 2021)
Standard Test Method for
Measuring the Resiliency of Turf Reinforcement Mats
(TRMs)
This standard is issued under the fixed designation D6524/D6524M; 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 Thistestmethodcoverstheresiliencyorrecoveryofturf 3.1 Definitions:
reinforcement mats (TRMs) after they have been subjected to 3.1.1 pressure, n—the force or load per unit area.
threecyclesofloadingat689kPa[100psi]for1min/percycle.
3.1.2 thickness—(1)thedistancebetweenoneplanarsurface
and its opposite parallel and planar surface; (2) for TRMs, the
1.2 This test method does not provide resiliency values for
distance between the upper and lower surfaces of the material,
TRMs under variable normal compressive stresses. This test
measured under a specified pressure and time.
method determines nominal resiliency.
3.1.3 turf reinforcement mat (TRM), n—a long-term nonde-
1.3 The values stated in either SI units or inch-pound units
gradable rolled erosion control product composed of UV
are to be regarded separately as standard. The values stated in
stabilized, nondegradable, synthetic fibers, nettings, or
each system are not necessarily exact equivalents; therefore, to
filaments, or combination thereof, processed into three-
ensure conformance with the standard, each system shall be
dimensional reinforcement matrices.
used independently of the other, and values from the two
systems shall not be combined.
3.2 For definitions of other textile terms used in this test
method, refer to Terminology D123.
1.4 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
3.3 For definitions of other terms relating to geotextiles and
responsibility of the user of this standard to establish appro-
geomembranes used in this test method, refer to Terminology
priate safety, health, and environmental practices and deter-
D4439.
mine the applicability of regulatory limitations prior to use.
1.5 This international standard was developed in accor- 4. Summary of Test Method
dance with internationally recognized principles on standard-
4.1 The nominal resiliency of TRMs is determined by
ization established in the Decision on Principles for the
observing the thickness of the TRM before and after it is
Development of International Standards, Guides and Recom-
subjected to three cycles of loading at 689 kPa [100 psi] for
mendations issued by the World Trade Organization Technical
1 min⁄cycle.
Barriers to Trade (TBT) Committee.
5. Significance and Use
2. Referenced Documents
5.1 Resiliency may be used to control the quality of many
2.1 ASTM Standards:
TRMs. Resiliency may be indicative of a TRM’s ability to
D123 Terminology Relating to Textiles
retain original configuration after exposure to the stresses
D4354 Practice for Sampling of Geosynthetics and Rolled
which may be exerted during manufacture, shipping, and
Erosion Control Products (RECPs) for Testing
installation. Resiliency is not generally indicative of field
D4439 Terminology for Geosynthetics
performance.
5.2 The resiliency of TRMs may vary considerably depend-
ing on the pressure applied to the specimen during loading
This test method is under the jurisdiction of ASTM Committee D35 on
cycles.To minimize variation, specific sample size and applied
Geosynthetics and is the direct responsibility of Subcommittee D35.05 on Geosyn-
pressure are indicated in this test method to ensure all results
thetic Erosion Control.
Current edition approved May 1, 2021. Published May 2021. Originally are comparable.
approved in 2000. Last previous edition approved in 2016 as D6524/D6524M – 16.
5.3 To determine the effect of different pressure loadings on
DOI: 10.1520/D6524_D6524M-16R21.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or the final thickness of TRMs, use this test method.
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
5.4 This test method may be used for acceptance testing of
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. commercial shipments of TRMs, but caution is advised since
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D6524/D6524M − 16 (2021)
information on between-laboratory precision is incomplete. 7.5 Number of Specimens—Unless otherwise agreed upon,
Comparative tests in accordance with 5.4.1 may be advisable. as when provided in an applicable material specification, take
5.4.1 In a case of a dispute arising from differences in a number of test specimens per laboratory sample such that the
reported test results when using this test method for acceptance usermayexpectatthe95 %probabilitylevelthatthetestresult
testing of commercial shipments, the purchaser and the sup- is not more than 6.0 % of the average above or below the true
plier should conduct comparative tests to determine if there is average of the sample. Determine the number of specimens per
a statistical bias between their laboratories. Competent statis- sample as follows:
tical assistance is recommended for the investigation of bias. 7.5.1 Reliable Estimate of v—When there is a reliable
As a minimum, the two parties should take a group of test estimate of v based upon extensive part records for similar
specimens that are as homogeneous as possible and that are materials tested in the user’s laboratory as directed in this test
formed from a lot of material of the type in question. The test method, calculate the required number of specimens for the
specimens should be randomly assigned in equal numbers to machine and cross-machine directions as follows:
each laboratory for testing. The average results from the two
n 5 ~tV/A! (1)
laboratories should be compared using Student’s t-test for
where:
unpaireddataandanacceptableprobabilitylevelchosenbythe
two begun. If bias is found, either its cause must corrected, or n = number of test specimens (rounded upward to a whole
the purchaser and be found and interpret future tests in supplier number),
v = reliable estimate of the coefficient of variation of indi-
must agree to the light of the known bias.
vidual observations on similar materials in the user’s
NOTE 1—The user should be aware that the compressibility of the
laboratory under conditions of single-operation
materials, their rebound characteristic
...