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Description of ASTM-D7005 2008ASTM D7005 - 03(2008)Standard Test Method for Determining the Bond Strength (Ply Adhesion) of GeocompositesActive Standard ASTM D7005 | Developed by Subcommittee: D35.01 Book of Standards Volume: 04.13 ASTM D7005Significance and Use This test method is to be used as a quality control or quality assurance test. As a manufacturing quality control (MQC) test, it would generally be used by the geocomposite product manufacturer or fabricator. As a construction quality assurance (CQA) test, it would be used by certification or inspection organizations. This test method can also be used to verify if the adhesion or bond strength varies after exposure to various incubation media in durability and/or chemical resistance testing. Whatever use is to be associated with the test, it should be understood that this is an index test. Note 2There have been numerous attempts to relate the results of this test to the interface shearing resistance of the respective materials determined per Test Method D 5321 . To date, no relationships have been established between the two properties. Test Method D 7005 for determining the bond strength (ply adhesion) strength may be used as an acceptance test of commercial shipments of geocomposites, but caution is advised since information about between-laboratory precision is incomplete. Comparative tests as directed in 5.4.1 are advisable. In the case of a dispute arising from differences in reported test results when using the procedure in Test Method D 7005 for acceptance of commercial shipments, the purchaser and the supplier should first confirm that the tests were conducted using comparable test parameters including specimen conditioning, grip faces, grip size, etc. Comparative tests should then be conducted to determine if there is a statistical bias between their laboratories. Competent statistical assistance is recommended for the investigation of bias. As a minimum, the two parties should take a group of test specimens that are as homogeneous as possible and that are from a lot of the material in question. The test specimens should be randomly assigned to each laboratory for testing. The average results from the two laboratories should be compared to the Student's t-test for unpaired data and an acceptable probability level chosen by the two parties before the testing is begun. If a bias is found, either its cause must be found and corrected or the purchaser and supplier must agree to interpret future test results in the light of the known bias. Refer to Practice D 2905 , Table 1. 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 SI units are to be regarded as the standard. The values given in parentheses are provided for information purposes 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. Specific precautionary statements are given in 11.1.1
ASTM Standards D76 Specification for Tensile Testing Machines for Textiles D2905 Practice for Statements on Number of Specimens for Textiles D4354 Practice for Sampling of Geosynthetics for Testing D4439 Terminology for Geosynthetics D5321 Test Method for Determining the Coefficient of Soil and Geosynthetic or Geosynthetic and Geosynthetic Friction by the Direct Shear Method Keywords bond strength; geocomposite; laminates; ply adhesion strength; Bend testing; Bond strength--geocomposites; Composites; Geocomposites; Laminates; Multi-ply materials/applications; Ply adhesion strength; ICS Code ICS Number Code 59.080.70 (Geotextiles) DOI: 10.1520/D7005-03R08 ASTM International is a member of CrossRef. ASTM D7005This book also exists in the following packages...Subscription InformationMADCAD.com ASTM Standards subscriptions are annual and access is unlimited concurrency based (number of people that can access the subscription at any given time) from single office location. For pricing on multiple office location ASTM Standards Subscriptions, please contact us at info@madcad.com or +1 800.798.9296.
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About ASTMASTM International, formerly known as the American Society for Testing and Materials (ASTM), is a globally recognized leader in the development and delivery of international voluntary consensus standards. Today, some 12,000 ASTM standards are used around the world to improve product quality, enhance safety, facilitate market access and trade, and build consumer confidence. ASTM’s leadership in international standards development is driven by the contributions of its members: more than 30,000 of the world’s top technical experts and business professionals representing 150 countries. Working in an open and transparent process and using ASTM’s advanced electronic infrastructure, ASTM members deliver the test methods, specifications, guides, and practices that support industries and governments worldwide. |
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