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Significance and Use
5.1 The ability to maintain design function (for example, barrier) or design properties (for example, peel strength, chemical resistance, etc.), or both, of a geosynthetic clay liner may be affected by damage to the physical structure of the GCL due to the rigors of field installation. The effect of damage may be assessed by analyzing specimens cut from sample(s) retrieved after installation in a representative test pad. Analysis may be performed with visual examination or laboratory testing of specimens from the control sample(s), and from the exhumed sample(s).
5.2 A uniform practice for installing and retrieving representative sample(s) from a test pad is needed to assess installation damage using project-specific or generally accepted, representative materials and procedures. Damage of a specific grade and type of GCL under specific installation procedures may be assessed with sample(s) exhumed from a full-scale test pad.
1.1 This practice covers standardized procedures for obtaining samples of geosynthetic clay liners (GCLs) from a test pad for use in assessment of the effects immediately after installation caused only by the installation techniques. The assessment may include physical testing. This practice is applicable to GCLs only.
1.2 This practice is limited to full-scale test pads, and does not address laboratory modeling of field conditions. This practice does not address which test method(s) to use for quantifying installation damage.
1.3 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.
1.4 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 (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D1557 Test Methods for Laboratory Compaction Characteristics of Soil Using Modified Effort (56,000 ft-lbf/ft3 (2,700 kN-m/m3))
D1883 Test Method for California Bearing Ratio (CBR) of Laboratory-Compacted Soils
D2216 Test Methods for Laboratory Determination of Water (Moisture) Content of Soil and Rock by Mass
D2487 Practice for Classification of Soils for Engineering Purposes (Unified Soil Classification System)
D4429 Test Method for CBR (California Bearing Ratio) of Soils in Place
D4439 Terminology for Geosynthetics
D5887/D5887M Test Method for Measurement of Index Flux Through Saturated Geosynthetic Clay Liner Specimens Using a Flexible Wall Permeameter
D5888 Guide for Storage and Handling of Geosynthetic Clay Liners
D5993 Test Method for Measuring Mass per Unit Area of Geosynthetic Clay Liners
D6072/D6072M Practice for Obtaining Samples of Geosynthetic Clay Liners
D6102 Guide for Installation of Geosynthetic Clay Liners
D6496/D6496M Test Method for Determining Average Bonding Peel Strength Between Top and Bottom Layers of Needle-Punched Geosynthetic Clay Liners
D6768/D6768M Test Method for Tensile Strength of Geosynthetic Clay Liners
D6913/D6913M Test Methods for Particle-Size Distribution (Gradation) of Soils Using Sieve Analysis
GRI StandardGRI Guide GS11 Standard Guide for Constructing Test Pads to Assess Protection Materials Intended to Avoid Geomembrane Puncture
|Link to Active (This link will always route to the current Active version of the standard.)|
ASTM D8204-18, Standard Practice for Burial and Retrieval of Samples in a Test Pad to Evaluate Installation Effects on Geosynthetic Clay Liners, ASTM International, West Conshohocken, PA, 2018, www.astm.orgBack to Top