Monash University - Geosynthetic Clay Liners in Mining Applications: Impact of Acid Solutions on GCLs Hydraulic Conductivity

Geosynthetic clay liners (GCLs) are widely used as leachate barriers in engineering constructions. However, the hydraulic performance of GCLs could be considerably impaired when permeated with low pH solutions. In mining projects, GCLs have a high probability to coming into contact with acids, such as in heap leach containment systems and the acidic achate caused by the oxidation of impound tailings.


Hydraulic conductivity is the key index to evaluate the effectiveness of GCLs as leachate barriers. The hydraulic conductivity test is conducted based on Darcy’s Law, and among all laboratory testing methods, we have adopted the constant head method in our research. Constant head method requires the system to maintain constant hydraulic pressure, pressure should be measured and supervised during the test.To download the complete case study click on the link below.

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