ASTM D6566-18(2023)

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: D6566 − 18 (Reapproved 2023)
Standard Test Method for
Measuring Mass Per Unit Area of Turf Reinforcement Mats
This standard is issued under the fixed designation D6566; 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 This test method covers an index to the determination of 3.1 For definitions of textile terms used in this test method,
mass per unit area of all turf reinforcement mats. refer to Terminology D123.
1.2 The values stated in SI units are to be regarded as 3.2 For definitions of terms relating to geotextiles used in
standard. The values given in parentheses are for information this test method, refer to Terminology D4439.
only.
4. Summary of Test Method
1.3 This standard does not purport to address all of the
4.1 The mass per unit area of a turf reinforcement mat is
safety concerns, if any, associated with its use. It is the
determined by weighing test specimens of known dimensions,
responsibility of the user of this standard to establish appro-
cut from equally spaced distances over the full width of the
priate safety, health, and environmental practices and deter-
laboratory sample. The calculated values are then averaged to
mine the applicability of regulatory limitations prior to use.
obtain the mean mass per unit area of the laboratory sample.
1.4 This international standard was developed in accor-
dance with internationally recognized principles on standard-
5. Significance and Use
ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom- 5.1 This test method is used to determine if the turf
mendations issued by the World Trade Organization Technical reinforcement mat meets specifications for mass per unit area.
Barriers to Trade (TBT) Committee. This test method can be used for quality control to determine
specimen conformance. This measurement allows for a simple
2. Referenced Documents
control of the delivered material by a comparison of the mass
per unit area of the delivered material and the specified mass
2.1 ASTM Standards:
per unit area.
D123 Terminology Relating to Textiles
D1776 Practice for Conditioning and Testing Textiles 5.2 The procedure in this test method may be used for
D4354 Practice for Sampling of Geosynthetics and Rolled
acceptance testing of commercial shipments, but caution is
Erosion Control Products (RECPs) for Testing advised since information about between-laboratory precision
D4439 Terminology for Geosynthetics
is incomplete. Comparative tests in accordance with 5.2.1 are
E177 Practice for Use of the Terms Precision and Bias in
advisable.
ASTM Test Methods
5.2.1 In case of a dispute arising from differences in
E691 Practice for Conducting an Interlaboratory Study to
reported test results when using the procedures in this test
Determine the Precision of a Test Method method for acceptance testing of commercial shipments, the
purchaser and the manufacturer should conduct comparative
2.2 ISO/DIS Document:
tests to determine if there is a statistical bias between their
9864-1990 Mass Per Unit Area of Geotextiles
laboratories. Competent statistical assistance is recommended
for the investigation of bias. At a minimum, the two parties
should take a group of test specimens that are as homogeneous
This test method is under the jurisdiction of ASTM Committee D35 on
as possible and which are from a lot of material of the type in
Geosynthetics and is the direct responsibility of Subcommittee D35.05 on Geosyn-
thetic Erosion Control.
question. The test specimen should then be randomly assigned
Current edition approved May 1, 2023. Published May 2023. Originally
in equal numbers to each laboratory for testing. The average
approved in 2000. Last previous edition approved in 2018 as D6566 – 18. DOI:
results from the two laboratories should be compared using the
10.1520/D6566-18R23.
appropriate Student’s t-test and an acceptable probability level
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
chosen by the two parties before testing is begun. If a bias is
Standards volume information, refer to the standard’s Document Summary page on
found, either its cause must be found and corrected or the
the ASTM website.
purchaser and the manufacturer must agree to interpret future
Available from American National Standards Institute (ANSI), 25 W. 43rd St.,
4th Floor, New York, NY 10036, http://www.ansi.org. test results in light of the known bias.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D6566 − 18 (2023)
6. Apparatus 7.5.2 No Reliable Estimate of v—When there is no reliable
estimate of v for the user’s laboratory, measurements shall be
6.1 Balance, calibrated, with an accuracy of 0.01 g.
made on a minimum of five (5) specimens per laboratory
7. Sampling
sample.
7.1 Lot Sample—In the absence of other guidelines, divide
8. Conditioning
the product into lots and take lot samples in accordance with
Practice D4354. 8.1 Bring the specimens to moisture equilibrium in the
atmosphere for testing turf reinforcement mats, that is, a
7.2 Laboratory Sample—For the laboratory sample, take a
temperature of 21 °C 6 2 °C (70 °F 6 4 °F) and relative
full-width sample of sufficient length in the machine direction
humidity of 60 % 6 10 %.
so that the required size and number of specimens can be
obtained. Exclude the inner and outer layers or wraps of the 8.2 Moisture equilibrium is considered to have been reached
roll or any material containing folds, crushed areas, or other
when the increase in mass of the specimen in successive
distortions not representative of the sampled lot. measurements made at intervals of not less than 2 h does not
exceed 60.1 % of the mass of the specimen. In general, many
7.3 Remove test specimens from the laboratory sample so
turf reinforcement mats contain more moisture when received
that each specimen will contain different machine and cross-
than they will after reaching moisture equilibrium. However,
machine elements with no specimen taken nearer than 100 mm
certain fibers may exhibit slow moisture equilibrium rates from
(4 in.) from the roll sides or ends, unless otherwise specified.
the “as-received” wet side. When this is known, a precondi-
7.4 Cut specimens such that they are representative of the
tioning cycle, as described in Practice D1776, may be agreed
entire roll width and with a combined total minimum area of
upon between contractual parties.
2 2
230 000 mm (356 in. ). Each test specimen shall be equal in
2 2
area (not less than 23 000 mm (35.6 in. )). Cut each test
9. Procedure
specimen with an accuracy of 60.5 % of its area.
9.1 Test the conditioned test specimens in the standard
NOTE 1—For test specimens prepared in the field, larger than minimum-
atmosphere for testing turf reinforcement mats as prescribed in
sized test specimens will be required to stay within the cutting accuracy
8.1.
(0.5 %). Field experience has shown that a test specimen with an area not
2 2
less than 207 000 mm (320.4 in. ) will be necessary to achieve the
9.2 Care should be taken in handling of the test specimens
required accuracy.
to avoid altering the natural finished state of the material.
7.4.1 Cut the test specimens at least one-tenth the width of
9.3 Weigh each of the conditioned specimens separately on
the turf reinforcement mat from any selvage, unless otherwise
a calibrated balance to the nearest 0.01 g.
specified.
7.4.2 If the structure of
...