ASTM D6567-00
(Test Method)Standard Test Method for Measuring the Light Penetration of a Turf Reinforcement Mat (TRM)
Standard Test Method for Measuring the Light Penetration of a Turf Reinforcement Mat (TRM)
SCOPE
1.1 This test method covers measuring the amount of light that penetrates through a Turf Reinforcement Mat.
1.2 This test method does not provide light penetration values for TRM under variable normal sun and soil conditions. This test method determines nominal light penetration.
1.3 The values stated as a percentage are to be regarded as the standard. The values provided in foot-candles 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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Designation:D6567–00
Standard Test Method for
Measuring the Light Penetration of a Turf Reinforcement
Mat (TRM)
This standard is issued under the fixed designation D 6567; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope 4. Summary of Test Method
4.1 The nominal light penetration of TRM’s is determined
1.1 This test method covers measuring the amount of light
that penetrates through a Turf Reinforcement Mat. by observing the foot-candles on the light meter through a
1.2 This test method does not provide light penetration determined open area versus the amount of foot-candles on the
values for TRM under variable normal sun and soil conditions. light meter once the TRM is placed over the determined open
This test method determines nominal light penetration. area.
1.3 The values stated as a percentage are to be regarded as
5. Significance and Use
the standard. The values provided in foot-candles are for
5.1 Light penetration may be used to control the quality of
information only.
1.4 This standard does not purport to address all of the many TRM’s. Light penetration is not indicative of field
performance and therefore is not recommended for specifica-
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro- tions.
5.2 The light penetration of TRM’s may vary considerably
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use. depending on the composite materials used in the matrix of the
mat or due to inconsistency within a given mat. To minimize
2. Referenced Documents
variation, specific sample size and procedures are indicated in
2.1 ASTM Standards: this test method to help ensure comparable results.
D 123 Terminology Relating to Textiles 5.3 This test method may be used to determine the effect of
D 1776 Practice for Conditioning Textiles for Testing different composite materials and make-up of TRM’s.
D 4354 Practice of Sampling of Geosynthetics for Testing 5.4 This test method may be used for acceptance testing of
D 4439 Terminology for Geosynthetics commercial shipments of TRM’s, but caution is advised since
information on between laboratory precision is incomplete.
3. Terminology
Comparative tests as directed in 5.4.1 may be advisable.
3.1 Definitions: 5.4.1 In case of a dispute arising from differences in
3.1.1 light penetration, n—the percentage of incandescent
reported test results when using this test method for acceptance
light that is measurable through a geosynthetic material from a testing of commercial shipments, the purchaser and the sup-
static light source.
plier should conduct comparative tests to determine if there is
3.1.2 turf reinforcement mat (TRM), n—a long term non- a statistical bias between their laboratories. Competent statis-
degradable rolled erosion control product composed of a UV
tical assistance is recommended for the investigation of bias.
stabilized, non-degradable, synthetic fibers, nettings or fila- As a minimum, the two parties should take a group of test
ments, or all of these, processed into three dimensional
specimens that are as homogeneous as possible and that are
reinforcement matrices. formed from a lot of material of the type in question. The test
3.2 For definition of other textile terms used in this test
specimens should be randomly assigned in equal numbers to
method, refer to Terminology D 123. each laboratory for testing. The average results from the two
3.3 For definitions of other terms relating to geotextiles and
laboratories should be compared using Student’s t-test for
geomembranes used in this test method, refer to Terminology unpaireddateandanacceptableprobabilitylevelchosenbythe
D 4439.
two begun. If bias is found, either its cause must be corrected,
or the purchaser and supplier must agree to the light of the
known bias.
This test method is under the jurisdiction of ASTM Committee D35 on
Geosynthetics and is the direct responsibility of Subcommittee D35.05 on Geosyn-
NOTE 1—The user should be aware that the makeup and possible
thetic Erosion Control.
movement of the composite materials, and the like, may affect the TRM’s
Current edition approved June 10, 2000. Published September 2000.
following the time when they are rolled up on rolls shipped and stored.
Annual Book of ASTM Standards, Vol 07.01.
Annual Book of ASTM Standards, Vol 04.13.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
D6567–00
6. Apparatus 250 by 200 mm (10 by 8 in.) test specimens from the sample.
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 capable of measuring determined open area
average of the sample. Determine the number of specimens per
foot-candle reading as well as determined area with dense
sample as follows:
TRM material in place. A meter with a digital readout such as
7.4.1 Reliable Estimate of v—When there is a reliable
Extech Instruments Model 407026 Heavy Duty Light Meter is
estimate of v based upon extensive past records for similar
recommended.
materials tested in the user’s laboratory as
...
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