Monash Case Study - GCLs 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 aggressive solutions. In coal seam gas (CSG) projects, GCLs have a high probability to coming into contact with brine solutions which are characterised by high salinity and elevated temperatures.


Hydraulic conductivity is the key index to evaluate the effectiveness of GCLs as liquid 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 read more, download the complete case study from the link below.

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