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Geotextiles > Functions

Filter and drainage

Tessilbrenta Geotextiles are widely used for filtration in road works and railway constructions as well as coastal protection and drainage trenches. The filtration function of a geotextile serves the same purpose as the separation function, but under different circumstances.
In the EN ISO standards the filtration function is defined as "The restraining of soil or other particles subjected to hydrodynamic forces while allowing the passage of fluids into or across a geotextile".

The characteristic opening size of Tessilbrenta Geotextiles is designed to retain particles while allowing free movement of water, making it possible to separate two layers during intense hydraulic activity. Migration of layers will reduce the load-bearing capacity of the construction and must therefore be avoided.
Tessilbrenta Geotextiles drainage systems substitute expensive mineral drainage layers.

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