ASTM D6567-00(2006)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: D6567 − 00(Reapproved 2006)
Standard Test Method for
Measuring the Light Penetration of a Turf Reinforcement
Mat (TRM)
This standard is issued under the fixed designation D6567; 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 3.2 For definition of other textile terms used in this test
method, refer to Terminology D123.
1.1 This test method covers measuring the amount of light
that penetrates through a Turf Reinforcement Mat. 3.3 For definitions of other terms relating to geotextiles and
geomembranes used in this test method, refer to Terminology
1.2 This test method does not provide light penetration
D4439.
values for TRM under variable normal sun and soil conditions.
This test method determines nominal light penetration.
4. Summary of Test Method
1.3 The values stated as a percentage are to be regarded as
4.1 ThenominallightpenetrationofTRMsisdeterminedby
the standard. The values provided in foot-candles are for
observing the foot-candles on the light meter through a
information only.
determined open area versus the amount of foot-candles on the
1.4 This standard does not purport to address all of the
light meter once the TRM is placed over the determined open
safety concerns, if any, associated with its use. It is the
area.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
5. Significance and Use
bility of regulatory limitations prior to use.
5.1 Light penetration may be used to control the quality of
many TRMs. Light penetration is not indicative of field
2. Referenced Documents
performance and therefore is not recommended for specifica-
2.1 ASTM Standards:
tions.
D123 Terminology Relating to Textiles
5.2 The light penetration of TRMs may vary considerably
D1776 Practice for Conditioning and Testing Textiles
depending on the composite materials used in the matrix of the
D4354 Practice for Sampling of Geosynthetics for Testing
mat or due to inconsistency within a given mat. To minimize
D4439 Terminology for Geosynthetics
variation, specific sample size and procedures are indicated in
3. Terminology
this test method to help ensure comparable results.
3.1 Definitions:
5.3 This test method may be used to determine the effect of
3.1.1 light penetration, n—the percentage of incandescent
different composite materials and make-up of TRMs.
light that is measurable through a geosynthetic material from a
5.4 This test method may be used for acceptance testing of
static light source.
commercial shipments of TRMs, but caution is advised since
3.1.2 turf reinforcement mat (TRM),n—a long term non-
information on between laboratory precision is incomplete.
degradable rolled erosion control product composed of a UV
Comparative tests as directed in 5.4.1 may be advisable.
stabilized, non-degradable, synthetic fibers, nettings or
5.4.1 In case of a dispute arising from differences in
filaments, or all of these, processed into three dimensional
reported test results when using this test method for acceptance
reinforcement matrices.
testing of commercial shipments, the purchaser and the sup-
plier should conduct comparative tests to determine if there is
This test method is under the jurisdiction of ASTM Committee D35 on
a statistical bias between their laboratories. Competent statis-
Geosynthetics and is the direct responsibility of Subcommittee D35.05 on Geosyn-
tical assistance is recommended for the investigation of bias.
thetic Erosion Control.
As a minimum, the two parties should take a group of test
Current edition approved June 1, 2006. Published June 2006. Originally
specimens that are as homogeneous as possible and that are
approved in 2000. Last previous edition approved in 2000 as D6567 – 00. DOI:
10.1520/D6567-00R06.
formed from a lot of material of the type in question. The test
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
specimens should be randomly assigned in equal numbers to
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
each laboratory for testing. The average results from the two
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. laboratories should be compared using Student’s t-test for
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D6567 − 00 (2006)
unpaireddateandanacceptableprobabilitylevelchosenbythe Exclude the inner and outer wraps of the roll or any material
two begun. If bias is found, either its cause must be corrected, containing folds, crushed areas or other distortions not repre-
or the purchaser and supplier must agree to the light of the
sentative of the sampled lot.
known bias.
7.3 Test Specimens— Remove the test specimens from the
NOTE 1—The user should be aware that the makeup and possible
laboratory sample in a randomly distributed pattern across the
movement of the composite materials, and the like, may affect the TRMs
width with no specimen taken nearer than 100 mm (4 in.) from
following the time when they are rolled up on rolls shipped and stored.
the selvage or roll edge, unless otherwise specified. Cut five
250 by 200 mm (10 by 8 in.) test specimens from the sample.
6. Apparatus
Handle the specimens in a manner to avoid the loss of loose
6.1 Light Penetration Box—See Fig. 1 (length view), and
filler and weaving components.
see Fig. 2: (width view)
7.4 Number of Specimens—Unless otherwise agreed upon,
NOTE 2—The light penetration box shown in Fig. 1 is built from ⁄4 in.
as when provided in an applicable material specification, take
wood.
a number of test specimens per laboratory sample such that the
6.2 Adjustable Rod with Light Bulb —See Fig. 3.
user may expect a 95 % probability level that the test result is
6.3 Light Meter— The light meter must measure in foot-
not more than 5 % of the average above or below the true
candles and be capabl
...