ASTM D7005/D7005M-16

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Designation: D7005/D7005M − 15 D7005/D7005M − 16
Standard Test Method for
Determining the Bond Strength (Ply Adhesion) of
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Geocomposites
This standard is issued under the fixed designation D7005/D7005M; 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
1.1 It has been widely discussed in the literature that bond strength of flexible multi-ply materials is difficult to measure with
current technology. The above is recognized and accepted, since all known methods of measurement include the force required to
bend the separated layers, in addition to that required to separate them. However, useful information can be obtained when one
realizes that the bending force is included and that direct comparison between different materials, or even between the same
materials of different thickness, cannot be made. Also, conditioning that affects the moduli of the plies will be reflected in the bond
strength measurement.
1.2 This index test method defines a procedure for comparing the bond strength or ply adhesion of geocomposites. The focus
is on geotextiles bonded to geonets or other types of drainage cores; for example, geomats, geospacers, etc. Other possible uses
are geotextiles adhered or bonded to themselves, geomembranes, geogrids, or other dissimilar materials. Various processes can
make such laminates: adhesives, thermal bonding, stitch bonding, needling, spread coating, etc.
1.3 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each
system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the
two systems may result in non-conformance with the standard.
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. Specific precautionary statements are given in 11.1.1.
2. Referenced Documents
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2.1 ASTM Standards:
D76/D76M Specification for Tensile Testing Machines for Textiles
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D2905 Practice for Statements on Number of Specimens for Textiles (Withdrawn 2008)
D4354 Practice for Sampling of Geosynthetics and Rolled Erosion Control Products(RECPs) for Testing
D4439 Terminology for Geosynthetics
D5321/D5321M Test Method for Determining the Shear Strength of Soil-Geosynthetic and Geosynthetic-Geosynthetic
Interfaces by Direct Shear
E177 Practice for Use of the Terms Precision and Bias in ASTM Test Methods
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
3. Terminology
3.1 Definitions:
3.1.1 atmosphere for testing geosynthetics—air maintained at a relative humidity between 50 to 70 % and a temperature of 21
6 2°C [70 6 4°F].
3.1.2 bond strength (ply adhesion)—amount of force required (per unit width) to separate plies of material or materials in
peeling mode plus the force to bend the plies.
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This test method is under the jurisdiction of ASTM Committee D35 on Geosynthetics and is the direct responsibility of Subcommittee D35.01 on Mechanical Properties.
Current edition approved July 1, 2015Jan. 1, 2016. Published July 2015January 2016. Originally approved in 2003. Last previous edition approved in 20082015 as
D7005–03(2008).D7005/D7005M–15. DOI: 10.1520/D7005_D7005M-15.10.1520/D7005_D7005M-16.
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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.
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The last approved version of this historical standard is referenced on www.astm.org.
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D7005/D7005M − 16
3.1.3 geocomposite—a product composed of two or more materials, at least one of which is a geosynthetic.
3.1.4 geomat/geospacer—any three dimensional, polymeric material used with soil, rock, or other geotechnical engineering
related material as an integral part of a man-made project, structure, or system.
3.1.5 geonet—a
...