Geotextiles & Geosynthetic Clay Linings
For geomembrane liner protection against physical damage, the non-wovens are the geotextile of choice.
Fibers of polyester or polypropylene are cross lapped on a web then punched together by needles during the manufacturing process.
Non-wovens are available in many weight options. The choice is determined by the specific application.
Geotextiles are commonly used to separate the various layers in a composite lining design and to protect geomembrane liners from damage.
They can be used to engineer preferential slip planes to avoid pulling a liner down a steep slope in the event of failure.
Geosynthetic Clay Linings (GCL’s) consist of two outer layers of geotextile encapsulating a layer of natural sodium bentonite. GLC’s are used to replace thick layers of natural compacted clay layers in landfill lining designs.
A 5mm thick GCL can replace 3 x150mm layers of compacted clay freeing up additional airspace for waste disposal. The function of a GCL is to act as a hydraulic barrier to water, leachate and other liquids.