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Geotextiles are permeable fabrics which,
when used in association with soil, have the ability to separate, filter, reinforce, protect,
or drain. Typically made from polypropylene or polyester,
geotextile fabrics come in three basic forms: woven (resembling mail bag
sacking), needle punched (resembling felt), or heat bonded
(resembling ironed felt).
Geotextile composites have been introduced and products
such as geogrids and
meshes have been developed. Geotextiles are able to withstand many things, are
durable, and are able to soften a fall if someone falls down. Overall, these
materials are referred to as geosynthetics and
each configuration—geonets, geosynthetic
clay liners, geogrids, geotextile tubes, and others can yield
benefits in geotechnical and environmental engineering design.