ASTM D6475-00

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Designation:D6475–00
Standard Test Method for
Measuring Mass Per Unit Area of Erosion Control Blankets
This standard is issued under the fixed designation D 6475; 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 D 6026 Practice for Using Significant Digits in Calculating
and Reporting Geotechnical Test Data
1.1 This test method can be used as an index test to
E 145 Specification for Gravity-Convection and Forced-
determine the mass per unit area of all erosion control blankets
Ventilation Ovens
(ECBs).
2.2 Erosion Control Technology Council Standard:
1.2 This test method requires several hours for proper
Technical Guidance Manual, Terminology and Index Test-
drying of the specimen in an oven at high temperature.
ing Procedures for Rolled Erosion Control Products
1.3 All observed and calculated values shall conform to the
guidelines for significant digits and rounding established in
3. Terminology
Practice D 6026.
3.1 Definitions:
1.3.1 The method used to specify collection, calculation, or
3.1.1 erosion control blanket, ECB, n—a degradable mate-
recording of data in this standard is not directly related to the
rial, composed primarily of processed natural organic materi-
accuracy to which the data can be applied in design or in other
als, manufactured or fabricated into rolls designed to reduce
uses, or both. Application of the results obtained using this
soil erosion and assist in the growth, establishment, and
standard is beyond its scope.
protection of vegetation.
1.4 The values stated in SI units shall be regarded as
3.1.2 erosion control net, ECN, n—a planar woven natural
standard. The values stated in parentheses are provided for
fiberorextrudedgeosyntheticmeshusedasacomponentinthe
information only.
manufacture of ECBs.
1.5 This standard does not purport to address all of the
3.1.3 index test, n—a test procedure that may be used to
safety concerns, if any, associated with its use. It is the
establish an order for a set of specimens with respect to the
responsibility of the user of this standard to establish appro-
property of interest.
priate safety and health practices and determine the applica-
3.1.4 lot, n—a unit of production, or a group of other units
bility of regulatory limitations prior to use.
or packages, taken for sampling or statistical examination,
2. Referenced Documents having one or more common properties and being readily
separable from other similar units.
2.1 ASTM Standards:
2 3.1.5 natural, adj—describes a class of various genera of
D 123 Terminology Relating to Geotextiles
fibers, of animal or vegetable origin.
D 653 Terminology Relating to Soil, Rock, and Contained
3 3.1.6 polymer, n—a chemical compound or mixture of
Fluids
compounds formed by polymerization and consisting essen-
D 1776 Practice for Conditioning Textiles for Testing
tially of repeating structural units.
D 3740 Practice for Minumum Requirements for Agencies
3.1.7 sample, n—a portion of material that is taken for
Engaged in the Testing and/or Inspection of Soil and Rock
3 testing or recording purposes and used in the laboratory as a
as Used in Engineering Design and Construction
source of individual specimens.
D 4354 Practice for Sampling Geosynthetics for Testing
4 3.1.8 temporary degradable, n—an erosion control blanket
D 4439 Terminology for Geosynthetics
composed of biologically, photochemically, or otherwise de-
D 5261 Test Method for Measuring Mass per Unit Area of
gradable materials that temporarily reduce soil erosion and
Geotextiles
enhances the establishment of vegetation.
4. Summary of Test Method
ThistestmethodisunderthejurisdictionofASTMCommitteeD18onSoiland
4.1 The mass per unit area of an ECB is determined by
Rock and is the direct responsibility of Subcommittee D18.25 on Erosion and
weighing test specimens of known dimensions cut from
Sediment Control.
Current edition approved Jan. 10, 2000. Published March 2000. Originally
published as D 6475–99. Last previous edition D 6475–99.
2 5
Annual Book of ASTM Standards, Vol 07.01. Annual Book of ASTM Standards, Vol 04.09.
3 6
Annual Book of ASTM Standards, Vol 04.08. Annual Book of ASTM Standards, Vol 14.02.
4 7
Annual Book of ASTM Standards, Vol 04.13. Available from ISO Case Postale 56, CH-1211, Geneva 20, Switzerland.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
D6475–00
various locations over the full width of the laboratory sample. D 5261). Cut each test specimen using a jig or template to
Themeasuredweightisthenusedtocalculatethemassperunit ensure uniformity of size, with an accuracy of 6 0.5 % of its
area of the specimen, and these values are averaged to obtain area.
the mean mass per unit area of the laboratory sample. 7.2.4 Cutspecimensfromacrosseachthirdoftherollwidth.
Donotcutspecimensfromthefirstorlast3m(10ft)oftheroll
5. Significance and Use length, or from within 8.8 cm (4 in.) of the edges of the roll.
7.2.5 For test specimens prepared in the field, larger than
5.1 This test method is used to determine if the ECB meets
minimum-sized test specimens will be required to stay within
specifications for mass per unit area. This measurement allows
the cutting accuracy of 0.5 %. It is recommended that field cut
for a simple control of the delivered material by a comparison
specimens be cut with an area not less than 1500 cm (230.7
of the mass per unit area of the delivered material and the
in. ), so that the integrity of the specimen will be preserved
specified mass per unit area.
until final specimen sizes can be prepared in the testing
5.2 The procedure in this test method may be used for
laboratory.
acceptance testing of commercial shipments, but caution is
7.2.6 Some products vary in physical properties in the
advised since information about between-laboratory precision
transverse or fill direction. For that reason it is appropriate to
is incomplete.
secure samples from across the roll width.
5.3 Testing under this standard shall conform to the require-
7.2.7 Procedures found to be successful for cutting test
ments of Practice D 3740
specimens from rolled erosion control products include the use
of bags and slip supports to keep all components of degradable
6. Apparatus
specimens together during the sample preparation.The method
6.1 Balance, weighing device, calibrated, capable of weigh-
of specimen cutting should be included with the reported data.
ing to an accuracy of 0.1 g.
7.2.8 If the structure of the erosion control blanket is such
6.2 Drying Oven, thermostatically controlled, preferably of
that the specified test specimen size is not representative of the
the forced-draft type, meeting the requirements of Specifica-
laboratory sample, a larger size shall be agreed upo
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