BENTOFIX

Fig. 1

Fig. 1 shows the common usage of a GCL within a base seal in landfill and mining base seal applications. In this application, the flux rate of fluid leakage through the GCL is influenced by the head of fluid acting on the GCL and the presence of an overlying geomembrane. Typically the head should be limited to thickness of the leachate collection layer and should be less than 50 cm. The stability of the GCL is influenced by the slope angle , the normal load gradients, and the interface friction angle , with adjacent layers. Additionally the diffusion rate through the GCL should be considered in the design. Freeze/thaw effects are in this application only a design issue during the initial phase and are typically not an issue once the total thickness of cover material over the GCL is greater than 1m (3 feet). Once the geomembranes has been placed (typically on the same day as the GCL installation) dry/wet effects are not of a concern.

Bentofix® GCLs with a nonwoven on both sides typically allows steeper designs than with woven components, due to an increase of the interface friction angle.




			Landfill and Mining Base Seals Composite Base Seal Fig. 1 Fig. 1 shows the common usage of a GCL within a base seal in landfill and mining base seal applications. In this application, the flux rate of fluid leakage through the GCL is influenced by the head of fluid acting on the GCL and the presence of an overlying geomembrane. Typically the head should be limited to thickness of the leachate collection layer and should be less than 50 cm. The stability of the GCL is influenced by the slope angle , the normal load gradients, and the interface friction angle , with adjacent layers. Additionally the diffusion rate through the GCL should be considered in the design. Freeze/thaw effects are in this application only a design issue during the initial phase and are typically not an issue once the total thickness of cover material over the GCL is greater than 1m (3 feet). Once the geomembranes has been placed (typically on the same day as the GCL installation) dry/wet effects are not of a concern. Bentofix® GCLs with a nonwoven on both sides typically allows steeper designs than with woven components, due to an increase of the interface friction angle.

			The information and data contained herein are, to the best of our knowledge, true and accurate. All suggestions and recommendations are offered without guarantee. Final determination of suitability for use based on any information provided is the sole responsibility of the user. There is no implied warranty of merchantability or fitness of the product for the contemplated use. Bentofix® is a registered trademark of NAUE GmbH & Co. KG GmbH (status 11/01)