ASTM D6454-99(2011)
(Test Method)Standard Test Method for Determining the Short-Term Compression Behavior of Turf Reinforcement Mats (TRMs)
Standard Test Method for Determining the Short-Term Compression Behavior of Turf Reinforcement Mats (TRMs)
SIGNIFICANCE AND USE
The compression behavior test for TRMs is intended to be an index test. It is anticipated that the results of the compression behavior test will be used to evaluate product. The results of the analyses also may be used to compare the relative compressive yield points of materials that exhibit a detectable compressive yield point. It is anticipated that this test will be used for quality control testing to evaluate uniformity and consistency within a lot or between lots where sample geometry factors, for example, thickness, or materials may have changed.
Note 1—This is a one-dimensional test for compressive loading of a TRM in one plane.
The compressive yield point of TRMs may be evaluated from the stress/strain relationship. Many materials exhibit compressive deformation but may not show a distinct compressive yield point.
This test method can be used to evaluate the short-term stress/strain behavior of TRMs under compressive stress while loaded at a constant rate of deformation.
This test method may be used for acceptance testing of commercial shipments of TRMs but caution is advised because interlaboratory testing is incomplete.
In the 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 statistically bias between their laboratories. Competent statistical assistance is recommended for the investigations of bias. As a minimum, two parties should take a group of test specimens from material shipped to project. The test specimens then should be assigned randomly in equal numbers to each laboratory for testing. The average results from the two laboratories should be compared using the Student's t-test for unpaired data and an acceptable probability level chosen by the two parties before the testing is begun. If bias is found, either its cause must be found and corrected, or the pu...
SCOPE
1.1 The test method establishes the procedures for evaluation of the deformations of a turf reinforcement mat (TRM) under short-term compressive loading. This test method is strictly an index test method to be used to verify the compressive strength consistency of a given manufactured geosynthetic. Results from this test method should not be considered as an indication of actual or long-term performance of the TRM in field applications.
1.2 Since these TRMs experience multidirectional compressive loadings in the field, this test method will not show actual field performance and should not be used for this specific objective. The evaluation of the results also should recognize that the determination of the short term single plane compressive behavior of geosynthetics does not reflect the installed performance of TRMs and, therefore, should not be used as the only method of product or performance specification.
1.3 The values in SI units are to be regarded as the standard. The values stated in inch-pound units are provided in parentheses 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)
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Designation: D6454 − 99(Reapproved 2011)
Standard Test Method for
Determining the Short-Term Compression Behavior of Turf
Reinforcement Mats (TRMs)
This standard is issued under the fixed designation D6454; 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 D5199 Test Method for Measuring the Nominal Thickness
of Geosynthetics
1.1 The test method establishes the procedures for evalua-
tion of the deformations of a turf reinforcement mat (TRM)
3. Terminology
under short-term compressive loading. This test method is
strictly an index test method to be used to verify the compres- 3.1 Definitions:
sive strength consistency of a given manufactured geosyn-
3.1.1 compressive deformation, [L], n—thedecreaseingage
thetic. Results from this test method should not be considered
length produced in the test specimen by a compressive load.
as an indication of actual or long-term performance of the
3.1.2 compressive strain, [nd], n—the ratio of compressive
TRM in field applications.
deformation to the gage length of the test specimen.
1.2 Since theseTRMs experience multidirectional compres-
3.1.3 gage length, [L], n—in compression testing, the mea-
sive loadings in the field, this test method will not show actual
sured thickness of the test specimen under specified compres-
field performance and should not be used for this specific
sional force, expressed in units of length prior to compressive
objective. The evaluation of the results also should recognize
loading. D5199
that the determination of the short term single plane compres-
sive behavior of geosynthetics does not reflect the installed
3.1.4 geosynthetic, n—a planar product manufactured from
performance ofTRMs and, therefore, should not be used as the
polymeric material used with foundation, soil, rock, earth, or
only method of product or performance specification.
any other geotechnical engineering related material as an
integral part of a man-made project, structure, or system.
1.3 The values in SI units are to be regarded as the standard.
D4439
The values stated in inch-pound units are provided in paren-
theses for information only.
3.1.5 index test, n—a test procedure which may contain a
1.4 This standard does not purport to address all of the known bias but which may be used to establish an order for a
setofspecimenswithrespecttothepropertyofinterest. D4439
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
3.1.6 yield point, n—the first point on the load-deformation
priate safety and health practices and determine the applica-
curve at which an increase in deformation occurs without a
bility of regulatory limitations prior to use.
corresponding increase in load.
3.1.6.1 Discussion—Some geosynthetics do not exhibit an
2. Referenced Documents
exact yield point. The tested TRM may exhibit a less steep
2.1 ASTM Standards:
slope at yield. In addition, it should be stated that the yield
D4354 Practice for Sampling of Geosynthetics and Rolled
point also may be the ultimate strength of the TRM.
Erosion Control Products(RECPs) for Testing
3.1.7 For definitions of terms relating to geotextiles, refer to
D4439 Terminology for Geosynthetics
Terminology D4439.
4. Summary of Test Method
This test method is under the jurisdiction of ASTM CommitteeD35 on
Geosynthetics and is the direct responsibility of Subcommittee D35.05 on Geosyn-
4.1 Specimensaremountedbetweenparallelplatesinaload
thetic Erosion Control.
frame. Compressive loads are applied at a constant rate of
CurrenteditionapprovedJune1,2011.PublishedJuly2011.Originallyapproved
crosshead movement. The deformations are recorded as a
in 1999. Last previous edition approved in 2006 as D6454–99(2006). DOI:
10.1520/D6454-99R11.
function of load. The compressive stress and strain are evalu-
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
atedandplotted.Thecompressiveyieldpointisevaluatedfrom
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
the stress/strain relationship for those materials that exhibit a
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. detectable compressive yield point.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D6454 − 99 (2011)
draping or flexing displacement.
5. Significance and Use
6.3 Movable Plate—The movable plate shall be of sufficient
5.1 The compression behavior test for TRMs is intended to
thickness and strength to preclude any bending during loading.
be an index test. It is anticipated that the results of the
It shall be parallel to the bottom fixed plate and attached to the
compression behavior test will be used to evaluate product.
compression mechanism. A spherical loading block of the
The results of the analyses also may be used to compare the
suspended,self-aligningtypeisrecommended.Thedimensions
relative compressive yield points of materials that exhibit a
and shape of the top movable, plate shall depend on the
detectable compressive yield point. It is anticipated that this
specimen dimensions and geometry. In general, both length
test will be used for quality control testing to evaluate
andwidthofthetopmovableplateshouldeachbeatleast20 %
uniformity and consistency within a lot or between lots where
greater than the length and width of the specimens.
sample geometry factors, for example, thickness, or materials
may have changed.
6.4 Load Indicator—Use a load-indicating mechanism that
has an accuracy of 6 1 % of the maximum indicated value of
NOTE 1—This is a one-dimensional test for compressive loading of a
the test (force).
TRM in one plane.
5.1.1 The compressive yield point of TRMs may be evalu- 6.5 Deformation Indicator—Use a deformation-indicating
ated from the stress/strain relationship. Many materials exhibit mechanism that has an accuracy of 6 1.0 % of the maximum
compressive deformation but may not show a distinct com- indicated value of the test (deformation).
pressive yield point.
6.6 Micrometer Dial Gage, caliper or steel rule, suitable for
5.2 This test method can be used to evaluate the short-term measuring dimensions of the specimens to+1%.
stress/strain behavior of TRMs under compressive stress while
loaded at a constant rate of deformation.
7. Sampling
5.3 This test method may be used for acceptance testing of 7.1 Lot Sample—Divide the product into lots and take the
commercial shipments ofTRMs but caution is advised because
lot sample as directed in Practice D4354.
interlaboratory testing is incomplete.
7.2 Laboratory Sample—Units in the laboratory sample
5.3.1 In the case of a dispute arising from differences in
should be the same as the units in the lot sample for the lot to
reported test results when using this test method for acceptance
betested.Takeasampleextendingacrossthefullwidth,thatis,
testing of commercial shipments, the purchaser and the sup-
cross-machine direction, of the TRM production unit of suffi-
plier should conduct comparative tests to determine if there is
cientlength,thatis,machinedirection,sothattherequirements
statistically bias between their laboratories. Competent statis-
of 7.3 can be met. Take a sample that will exclude material
tical assistance is recommended for the investigations of bias.
from the outer wrap of a roll, if applicable, unless the sample
As a minimum, two parties should take a group of test
is taken at the production site, then the inner and
...
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