Geotextiles form one of the largest groups of geosynthetics. They are indeed textiles, but they consist of synthetic fibers so biodegradation and a short product lifetime is not an issue. Geotextiles are porous to liquid flow across their manufactured plane and also within their thickness, but to a widely varying degree. There are many applications for geotextiles that have been developed; however, the most common ones are for the following functions: separation, reinforcement, filtration, and/or drainage.
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