ASTM D6475-17

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: D6475 − 17
Standard Test Method for
Measuring Mass per Unit Area of Erosion Control Blankets
This standard is issued under the fixed designation D6475; 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 D6026 Practice for Using Significant Digits in Geotechnical
Data
1.1 This test method can be used as an index test to
E145 Specification for Gravity-Convection and Forced-
determine the mass per unit area of all erosion control blankets
Ventilation Ovens
(ECBs).
E177 Practice for Use of the Terms Precision and Bias in
1.2 All observed and calculated values shall conform to the
ASTM Test Methods
guidelines for significant digits and rounding established in
E691 Practice for Conducting an Interlaboratory Study to
Practice D6026.
Determine the Precision of a Test Method
1.2.1 The method used to specify collection, calculation, or
2.2 Erosion Control Technology Council Standard:
recording of data in this test method is not directly related to
Technical Guidance Manual, Terminology and IndexTesting
theaccuracytowhichthedatacanbeappliedindesignorother
Procedures for Rolled Erosion Control Products
uses or both.Application of the results obtained using this test
method is beyond its scope.
3. Terminology
1.3 Units—The values stated in SI units are to be regarded
3.1 Definitions—For other terminology, see Terminologies
as the standard. No other units of measurement are included in
D123, D653, and D4439.
this standard.
3.2 Definitions of Terms Specific to This Standard:
1.4 This standard does not purport to address all of the
3.2.1 erosion control blanket, ECB, n—degradable material,
safety concerns, if any, associated with its use. It is the
composed primarily of processed natural organic materials,
responsibility of the user of this standard to establish appro-
manufactured or fabricated into rolls designed to reduce soil
priate safety and health practices and determine the applica-
erosion and assist in the growth, establishment, and protection
bility of regulatory limitations prior to use.
of vegetation.
2. Referenced Documents
3.2.2 erosion control net, ECN, n—planar woven natural
fiberorextrudedgeosyntheticmeshusedasacomponentinthe
2.1 ASTM Standards:
manufacture of ECBs.
D123 Terminology Relating to Textiles
D653 Terminology Relating to Soil, Rock, and Contained
3.2.3 index test, n—test procedure that may be used to
Fluids
establish an order for a set of specimens with respect to the
D3740 Practice for Minimum Requirements for Agencies
property of interest.
Engaged in Testing and/or Inspection of Soil and Rock as
3.2.4 lot, n—unit of production, or a group of other units or
Used in Engineering Design and Construction
packages, taken for sampling or statistical examination, having
D4354 Practice for Sampling of Geosynthetics and Rolled
one or more common properties and being readily separable
Erosion Control Products (RECPs) for Testing
from other similar units.
D4439 Terminology for Geosynthetics
3.2.5 natural, adj—describes a class of various general
D5261 Test Method for Measuring Mass per Unit Area of
fibers of animal or vegetable origin.
Geotextiles
3.2.6 polymer, n—chemical compound or mixture of com-
1 pounds formed by polymerization and consisting essentially of
This test method is under the jurisdiction ofASTM Committee D18 onSoil and
Rock and is the direct responsibility of Subcommittee D18.25 on Erosion and
repeating structural units.
Sediment Control Technology.
3.2.7 sample, n—portion of material that is taken for testing
Current edition approved Feb. 15, 2017. Published March 2017. Originally
approved in 1999. Last previous edition approved in 2006 as D6475–06, which was or recording purposes and used in the laboratory as a source of
withdrawn January 2015 and reinstated in February 2017. DOI: 10.1520/D6475-17.
individual specimens.
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
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. Available from ISO Case Postale 56, CH-1211, Geneva 20, Switzerland.
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D6475 − 17
3.2.8 temporary degradable, n—erosion control blanket so as to maintain the structural integrity of the product. This is
composed of biologically, photochemically, or otherwise de- true not only for generating a test sample, but also for the
gradable materials that temporarily reduce soil erosion and generation of individual test specimens from the sample for
enhances the establishment of vegetation. testing. Careless handling of materials may result in loss of
component fibers, yarns, netting, or stitching, or a combination
4. Summary of Test Method
thereof, and a bias of test results. Note any loss of material
components observed during sample and test specimen prepa-
4.1 The mass per unit area of an ECB is determined by
ration.
weighing test specimens of known dimensions cut from
various locations over the full width of the laboratory sample.
7.2.3 The number of test specimens shall be a minimum of
Themeasuredweightisthenusedtocalculatethemassperunit five, cut in square or rectangular configuration using sharp
area of the specimen, and these values are averaged to obtain
shears, so that they are representative of the entire roll width
the mean mass per unit area of the laboratory sample. and with a combined total minimum area of 5000 cm . Each
test specimen shall be equal in area (not less than 1000 cm in
4.2 This test method requires several hours for proper
accordance with Test Method D5261). Cut each test specimen
drying of the specimen in an oven at high temperature.
using a jig or template to ensure uniformity of size, with an
accuracy of 60.5 % of its area.
5. Significance and Use
7.2.4 Cutspecimensfromacrosseachthirdoftherollwidth.
5.1 This test method is used to determine if the ECB meets
Do not cut specimens from the first or last 3 m of the roll
specifications for mass per unit area. This measurement allows
length, or from within 10 cm of the edges of the roll.
for a simple control of the delivered material by a comparison
7.2.5 For test specimens prepared in the field, larger than
of the mass per unit area of the delivered material and the
minimum-sized test specimens will be required to stay within
specified mass per unit area.
the cutting accuracy of 0.5 %. It is recommended that field cut
5.2 The procedure in this test method may be used for
specimens be cut with an area not less than 1500 cm , so that
acceptance testing of commercial shipments, but caution is
the integrity of the specimen will be preserved until final
advised since information about between-laboratory precision
specimen sizes can be prepared in the testing laboratory.
is incomplete.
7.2.6 Some products vary in physical properties in the
5.3 Testing under this standard shall conform to the require-
transverse or machine direction. For that reason, it is appro-
ments of Practice D3740.
priate to secure samples from across the roll width.
7.2.7 Procedures found to be successful for cutting test
6. Apparatus
specimens from rolled erosion control products include the use
6.1 Balance, weighing device, calibrated, capable of weigh-
of bags and slip supports to keep all components of degradable
ing to an accuracy of 0.1 g.
specimens together during the sample preparation.The method
6.2 Drying Oven, thermostatically controlled, preferably of
of specimen cutting should be included with the reported data.
the forced-draft type, meeting the requirements of Specifica-
7.2.8 If the structure of the erosion control blanket is such
tion E145 and capable of maintaining a uniform temperature of
that the specified test specimen size is not representative of the
50 6 5°C throughout the drying chamber.
laboratory sample, a larger size shall be agreed upon between
the purchaser and the supplier.
6.3 Specimen Trays, made of material resistant to corrosion
and change in mass upon repeated heating, cooling, exposure 7.2.9 All samples shall be marked with identification
to materials of varying pH, and cleaning big enough to hold information, including manufacturer’s name, style, or product
number, unique roll number, and date sampled.
1000 cm specimen and able to handle temperature swing from
50°C to room temperature.
7.2.10 Most conformance testing requires the laboratory to
sample the material randomly across the roll width. When this
6.4 Container Handling Apparatus, gloves, tongs, or suit-
is required, a section of material representing the entire roll
able holder for moving and handling hot trays after drying.
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