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Lab Services: Geosynthetic testing

Lab Services: Geosynthetic testing

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Test Method Title

Permeability of Geosynthetic Clay Liners (GCLs) **GRI has discontinued this method, the industry-accepted standard test method is now ASTM D5887

Reference Number

GRI GCL 2

Material

Geosynthetic Clay Liner

Test Property

Permeability

Description of Test

This test method involves permeation of a 100-mm (4in.) diameter GCL test specimen. The specimen is set up in a flexible-wall permeameter, subjected to a total stress of 550 kPa (80 psi) and a backpressure of 515 kPa (75psi) for a period of 48h. Flow is initiated using deionized water by raising the pressure on the influent side of the test specimen to 530 kPa (77psi). The flux is determined when inflow and outflow are approximately equal (within 625%).

Preferred Test Sample Size

Number of Test Specimens

1

Test Specimen Size

4" diameter

Keywords

Index, flux, permeability

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