ASTM D7986-17a

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Designation: D7986 − 17 D7986 − 17a
Standard Practice for
Preparing Specimens of Hydraulic Erosion Control Products
for Index Property Testing
This standard is issued under the fixed designation D7986; 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 Scope*
1.1 This practice specifies a set of instructions for preparing samples of hydraulic erosion control products (HECPs) for index
property testing.
1.2 All observed and calculated values shall conform to the guidelines for significant digits and rounding established in Practice
D6026.
1.2.1 For purposes of comparing measured or calculated value(s) with specified limits, the measured or calculated value(s) shall
be rounded to the nearest decimal or significant digits in the specified limits.
1.2.2 The procedures used to specify how data are collected/recorded or calculated, in this standard are regarded as the industry
standard. In addition, they are representative of the significant digits that generally should be measured. The procedures used do
not consider material variation, purpose for obtaining the data, special purpose studies, or any considerations for the users
objectives; and it is common practice to increase or reduce the significant digits of reported data to be commensurate with these
considerations. It is beyond the scope of this standard to consider significant digits used in the analytical methods for engineering
design.
1.3 Units—The values stated in SI units are being regarded as standard. No other units of measurement are included in the
practice.
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.
1.5 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.
2. Referenced Documents
2.1 ASTM Standards:
D653 Terminology Relating to Soil, Rock, and Contained Fluids
D3740 Practice for Minimum Requirements for Agencies Engaged in Testing and/or Inspection of Soil and Rock as Used in
Engineering Design and Construction
D4753 Guide for Evaluating, Selecting, and Specifying Balances and Standard Masses for Use in Soil, Rock, and Construction
Materials Testing
D6026 Practice for Using Significant Digits in Geotechnical Data
E145 Specification for Gravity-Convection and Forced-Ventilation Ovens
3. Terminology
3.1 Definitions:
3.1.1 For definitions of common technical terms used in this standard, refer to Terminology D653.
3.2 Definitions of Terms Specific to This Standard:
This test method is under the jurisdiction of ASTM Committee D18 on Soil and Rock and is the direct responsibility of Subcommittee D18.25.01 on Mulches.
Current edition approved Feb. 15, 2017July 15, 2017. Published February 2017July 2017. Originally approved in 1999. Last previous edition approved in 20152017 as
D7986–15.–17. DOI: 10.1520/D7986-17. DOI: 10.1520/D7986-17A.
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.
*A Summary of Changes section appears at the end of this standard
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D7986 − 17a
3.2.1 Hydraulic Erosion Control Product (HECP), n—in erosion control, a manufactured, temporary, degradable, pre-packaged
fibrous material that is mixed with water and hydraulicallyapplied as a slurry to reduce soil erosion and assist in the establishment
and growth of vegetation.
3.2.2 index property test, n—in erosion control, a standard test that may be used to compare the relative material properties of
erosion control products.
4. Summary of Practice
4.1 A representative sample of dry HECP is mixed with water in an amount corresponding to the desired mixing rate. The
resulting slurry is spread evenly on a metal sheet pan in an amount corresponding to the desired field application rate. The material
is dried and the resulting sample is removed and cut to sizes appropriate for index property tests.
5. Significance and Use
5.1 This practice is intended to simulate mixing of HECP products as would be mixed on a job or project site but in a laboratory
environment on a smaller scale. Dried samples are not necessarily intended to represent a field application of HECP products but
would be representative of the correct amount of material applied to a known area and provide a basis for consistent and repeatable
index property testing.
NOTE 1—The quality of the result produced by this standard is dependent on the competence of the personnel performing it, and the suitability of the
equipment and facilities used. Agencies that meet the criteria of Practice D3740 are generally considered capable of competent and objective
testing/sampling/inspection/etc. Users of this standard are cautioned that compliance with Practice D3740 does not in itself assure reliable results. Reliable
results depend on many factors; Practice D3740 provides a means of evaluating some of those factors.
6. Apparatus
6.1 Baking Pan—Fabricate a stainless steel straight-sided (not tapered), metal baking pan having dimensions of 280 6 5 mm
by 380 6 5 mm by 6.5 6 0.5 mm tall. Retain fabricated pan for future testing.
6.2 Stand Mixer—A device capable of maintaining a speed between 60 and 90 rpm on the low setting and equipped with a 4
L stainless steel mixing bowl with a coated flat beater attachment.
6.3 Drying Oven—Thermostatically-controlled, preferably of the forced-draft type, meeting the requirements of Specification
E145 and capable of maintaining a uniform temperature of 93 6 5°C.
6.4 Balance—Balances shall conform to the requirements of Specification D4753.
6.4.1 To determine the mass of the specimen, the balance shall have readability without estimation of 0.01 g. The capacity of
this balance will need to exceed the mass of the container plus a specimen. In general, a balance with minimum capacity of 600
g is sufficient.
6.5 Graduated Cylinders—Two cylinders, one graduated for 1000 mL
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