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%).
Number of Test Specimens
1
Test Specimen Size
4" diameter
Keywords
flux, index, permeability