ASTM D7005/D7005M-16(2024) PDF
Standard Test Method for Determining the Bond Strength (Ply Adhesion) of Geocomposites
Standard Test Method for Determining the Bond Strength (Ply Adhesion) of Geocomposites
- Статус документа:
- Действующий
- Формат:
- Электронный (PDF)
- Количество страниц:
- 4
- Дата публикации:
- 1 февраля 2024 г.
- Издание:
- D7005/D7005M
- ICS:
- 59.080.70
SIGNIFICANCE AND USE 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 ... 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 are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined. 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. Specific precautionary statements are given in 11.1.1. 1.5 This international standard was developed in accordance with internationally recognized principles on ...
Abstract
Overview
ASTM D7005/D7005M-16(2024): Standard Test Method for Determining the Bond Strength (Ply Adhesion) of Geocomposites establishes a reliable, repeatable method to assess the bond strength or ply adhesion within multi-layer geocomposite materials. This test method is primarily used for quality control and quality assurance in manufacturing and construction applications. The standard specifically addresses geosynthetics, including geotextiles, geonets, geomats, geospacers, and other composite drainage systems, granting professionals a common framework for comparing and verifying ply adhesion.
Key Topics
- Bond Strength (Ply Adhesion): Measures the amount of force required to separate the layers (plies) of a geocomposite material in a peeling mode, inclusive of any force needed to bend the separated plies.
- Index Test: This method provides comparative rather than absolute values, serving as an index to rank the bond strength among similar materials or products processed under varying conditions.
- Quality Control (MQC): Used by geocomposite manufacturers to ensure product consistency during fabrication.
- Quality Assurance (CQA): Employed by construction inspection and certification organizations to confirm materials meet project specifications.
- Durability and Chemical Resistance: Useful for evaluating ply adhesion after exposure to environmental factors or chemical agents, to determine if bond strength is impacted.
- Precision and Bias: Emphasizes the importance of standardized procedures, consistent specimen conditioning, grip faces, and grip sizes. Comparative testing between laboratories is recommended to address potential variability.
- Sampling and Preparation: Standardizes specimen collection to ensure reproducibility across different batches and laboratories.
- Safety and Units: Highlights the responsibility of users to consider safety, health, and environmental practices, and mandates reporting results in either SI or inch-pound units, but not both combined.
Applications
- Geocomposite Manufacturing: Enables manufacturers to consistently monitor and control the ply adhesion of their geocomposite products, such as geonets bonded with geotextiles or geomembranes, by using uniform test procedures.
- Construction Projects: Assists engineers and inspectors in verifying that geocomposite materials installed on-site meet required specifications for bond strength and are suitable for their intended drainage or separation functions.
- Material Development: Facilitates the assessment of new adhesives, bonding processes (thermal bonding, needling, stitch bonding, spread coating, etc.), and innovative geosynthetic materials.
- Durability Testing: Supports studies on how environmental conditions or chemical exposure impact geocomposite ply adhesion, informing longer-term performance and specification development.
- Product Acceptance Testing: Used as an acceptance criterion for commercial shipments, with caution advised due to possible variation in results between different laboratories.
Related Standards
Professionals utilizing ASTM D7005/D7005M-16(2024) may also reference:
- ASTM D5321/D5321M: Shear strength of soil-geosynthetic and geosynthetic-geosynthetic interfaces by direct shear.
- ASTM D4439: Standard terminology for geosynthetics.
- ASTM D4354: Practices for sampling of geosynthetics and rolled erosion control products.
- ASTM D76/D76M: Specification for tensile testing machines for textiles.
- ASTM E177: Use of the terms precision and bias in ASTM test methods.
- ASTM E691: Conducting interlaboratory studies to determine test method precision.
Practical Value
Implementing ASTM D7005/D7005M helps ensure performance and reliability in infrastructure and environmental projects where geocomposite materials play a critical role. By promoting consistent testing and reporting of ply adhesion strength, this standard empowers manufacturers, engineers, and certifiers to make informed decisions and maintain high-quality standards in civil engineering, landfill construction, drainage solutions, and broader geosynthetic applications.
Keywords: ASTM D7005, bond strength, ply adhesion, geocomposites, geotextiles, geonets, quality assurance, geosynthetics testing, laminates.
Технические детали
- Технический комитет
- D35 - Geosynthetics
- SKU
- ASTM D7005/D7005M-16(2024)
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