ASTM D7005/D7005M-16
Standard Test Method for Determining the Bond Strength (Ply Adhesion) of Geocomposites

Standard No.

ASTM D7005/D7005M-16

Release Date

2016

Published By

American Society for Testing and Materials (ASTM)

Status

Be replaced

Replace By

ASTM D7005/D7005M-16(2024)

Latest

ASTM D7005/D7005M-16(2024)

Scope

5.1 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.

5.2 This test method can also be used to verify if the adhesion or bond strength varies after exposure to various incubation media in durability or chemical resistance testing, or both.

5.3 Whatever use is to be associated with the test, it should be understood that this is an index test.

Note 2: There have been numerous attempts to relate the results of this test to the interface shearing resistance of the respective materials determined per Test Method D5321/D5321M. To date, no relationships have been established between the two properties.

5.4 Test Method D7005/D7005M 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.

5.4.1 In the case of a dispute arising from differences in reported test results when using the procedure in Test Method D7005/D7005M 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 D2905, Table 1.

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.<......

ASTM D7005/D7005M-16 Referenced Document

• ASTM D2905 Standard Practice for Statements on Number of Specimens for Textiles
• ASTM D4354 Standard Practice for Sampling of Geosynthetics for Testing
• ASTM D4439 Standard Terminology for Geosynthetics*， 2024-02-01 Update
• ASTM D5321/D5321M Standard Test Method for Determining the Shear Strength of Soil-Geosynthetic and Geosynthetic-Geosynthetic Interfaces by Direct Shear*， 2021-06-01 Update
• ASTM D76/D76M Standard Specification for Tensile Testing Machines for Textiles*， 2021-07-01 Update
• ASTM E177 Standard Practice for Use of the Terms Precision and Bias in ASTM Test Methods
• ASTM E691 Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method

ASTM D7005/D7005M-16 history

• 2024 ASTM D7005/D7005M-16(2024) Standard Test Method for Determining the Bond Strength (Ply Adhesion) of Geocomposites
• 2016 ASTM D7005/D7005M-16 Standard Test Method for Determining the Bond Strength (Ply Adhesion) of Geocomposites
• 2015 ASTM D7005/D7005M-15 Standard Test Method for Determining the Bond Strength (Ply Adhesion) of Geocomposites This test method is under the jurisdiction of ASTM Committee D35 on Geosynthetics and is the direct responsibili
• 2003 ASTM D7005-03(2008) Standard Test Method for Determining the Bond Strength (Ply Adhesion) of Geocomposites
• 2003 ASTM D7005-03 Standard Test Method for Determining the Bond Strength (Ply Adhesion) of Geocomposites