ASTM D6524-00(2011)
(Test Method)Standard Test Method for Measuring the Resiliency of Turf Reinforcement Mats (TRMs)
Standard Test Method for Measuring the Resiliency of Turf Reinforcement Mats (TRMs)
SIGNIFICANCE AND USE
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.
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.
To determine the effect of different pressure loadings on the final thickness of TRMs, use this test method.
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.
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 date 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 characteristics, and the like will al...
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 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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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: D6524 − 00(Reapproved 2011)
Standard Test Method for
Measuring the Resiliency of Turf Reinforcement Mats
(TRMs)
This standard is issued under the fixed designation D6524; 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 stabilized, nondegradable, synthetic fibers, nettings, or
filaments, or combination thereof, processed into three-
1.1 Thistestmethodcoverstheresiliencyorrecoveryofturf
dimensional reinforcement matrices.
reinforcement mats (TRMs) after they have been subjected to
threecyclesofloadingat689kPa(100psi)for1min/percycle. 3.2 For definitions of other textile terms used in this test
method, refer to Terminology D123.
1.2 This test method does not provide resiliency values for
TRMs under variable normal compressive stresses. This test 3.3 For definitions of other terms relating to geotextiles and
method determines nominal resiliency. geomembranes used in this test method, refer to Terminology
D4439.
1.3 The values stated in SI units are to be regarded as
standard. The values given in parentheses are for information
4. Summary of Test Method
only.
4.1 The nominal resiliency of TRMs is determined by
1.4 This standard does not purport to address all of the
observing the thickness of the TRM before and after it is
safety concerns, if any, associated with its use. It is the
subjected to three cycles of loading at 689 kPa (100 psi) for 1
responsibility of the user of this standard to establish appro-
min/cycle.
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
5. Significance and Use
2. Referenced Documents 5.1 Resiliency may be used to control the quality of many
2 TRMs. Resiliency may be indicative of a TRM’s ability to
2.1 ASTM Standards:
retain original configuration after exposure to the stresses
D123 Terminology Relating to Textiles
which may be exerted during manufacture, shipping, and
D4354 Practice for Sampling of Geosynthetics and Rolled
installation. Resiliency is not generally indicative of field
Erosion Control Products(RECPs) for Testing
performance.
D4439 Terminology for Geosynthetics
5.2 The resiliency of TRMs may vary considerably depend-
3. Terminology
ing on the pressure applied to the specimen during loading
3.1 Definitions:
cycles.To minimize variation, specific sample size and applied
3.1.1 pressure, n—the force or load per unit area. pressure are indicated in this test method to ensure all results
are comparable.
3.1.2 thickness—(1)thedistancebetweenoneplanarsurface
and its opposite parallel and planar surface; (2) for TRMs, the
5.3 To determine the effect of different pressure loadings on
distance between the upper and lower surfaces of the material,
the final thickness of TRMs, use this test method.
measured under a specified pressure and time.
5.4 This test method may be used for acceptance testing of
3.1.3 turf reinforcement mat (TRM), n—a long-term nonde-
commercial shipments of TRMs, but caution is advised since
gradable rolled erosion control product composed of UV
information on between-laboratory precision is incomplete.
Comparative tests, in accordance with 5.4.1 may be advisable.
This test method is under the jurisdiction of ASTM Committee D35 on
5.4.1 In a case of a dispute arising from differences in
Geosynthetics and is the direct responsibility of Subcommittee D35.05 on Geosyn-
reported test results when using this test method for acceptance
thetic Erosion Control.
testing of commercial shipments, the purchaser and the sup-
CurrenteditionapprovedJune1,2011.PublishedJuly2011.Originallyapproved
plier should conduct comparative tests to determine if there is
in 2000. Last previous edition approved in 2006 as D6524 – 00(2006). DOI:
10.1520/D6524-00R11.
a statistical bias between their laboratories. Competent statis-
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
tical assistance is recommended for the investigation of bias.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
As a minimum, the two parties should take a group of test
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. specimens that are as homogeneous as possible and that are
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D6524 − 00 (2011)
formed from a lot of material of the type in question. The test materials tested in the user’s laboratory as directed in this test
specimens should be randomly assigned in equal numbers to method, calculate the required number of specimens for the
each laboratory for testing. The average results from the two machine and cross-machine directions as follows:
laboratories should be compared using Student’s t-test for 2
n 5 tV/A (1)
~ !
unpaireddateandanacceptableprobabilitylevelchosenbythe
where:
two begun. If bias is found, either its cause must corrected, or
thepurchaserandbefoundandinterpretfuturetestsinsupplier n = number of test specimens (rounded upward to a whole
number),
must agree to the light of the known bias.
v = reliable estimate of the coefficient of variation of
NOTE 1—The user should be aware that the compressibility of the
individual observations on similar materials in the
materials, their rebound characteristics, and the like will also be affected
user’s laboratory under conditions of single-operation
by the thickness of the TRMs following the time when they are rolled up
on rolls shipped and stored. precision, %,
t = value of Student’s t for one-sided limits (see Table 1), a
6. Apparatus
95 % probability level, and the degrees of freedom
associated with the estimate of v, and
6.1 Thickness Testing Instrument —The thickness gauge
A = 5.0 % of the average, the value of the allowable
shallhaveabase(oranvil)andafree-movingpresserfootplate
variation.
whose planar faces are parallel to each other to <0.1 mm. A
7.5.2 No Reliable Estimate of v—When there is no reliable
gauge with a 150-mm (6-in.) diameter presser foot, the base
shall extend at least 10 mm in all directions further than the estimate of v for the user’s laboratory, Eq 1 should not be used
directly. Instead, spec
...
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