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Geotextile, also known as geotextile fabric, is a permeable geosynthetic material made from synthetic fibers through needle punching or weaving. Geotextile is one of the new geosynthetic materials, and the finished product is in the form of a cloth. Geotextiles are divided into woven geotextiles and non-woven filament geotextiles.
Geomembrane is a geotechnical impermeable material made of plastic film as the impermeable base material and compounded with non-woven fabric. The impermeability of the new material, geomembrane, mainly depends on the impermeability of the plastic film. The plastic films used for impermeability mainly include polyvinyl chloride (PVC), polyethylene (PE), and EVA (ethylene/vinyl acetate copolymer). In tunnel applications, ECB (ethylene-vinyl acetate modified asphalt blended geomembrane) is also designed to be used. They are a type of flexible polymer chemical material with a low specific gravity, strong extensibility, high adaptability to deformation, corrosion resistance, low temperature resistance, and good frost resistance.
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