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Geosynthetics terminology

GEOTEXTILE

a permeable, polymeric (synthetic or natural) textile material, in the form of manufactured sheet (which may be woven, nonwoven or knitted) used in geotechnical, environmental, hydraulic and transportation engineering applications.

Woven geotextile

a geotextile produced by interlacing, usually at right angles, two or more sets of fibres, filaments, tapes or other elements.


Knitted geotextile

a geotextile produced by interlooping one or more fibres, yarns, filaments or other elements.

 

Nonwoven geotextile

a geotextile produced by bonding (by means of friction and/or cohesion and/or adhesion, see ISO 9092) of directionally or randomly oriented fibres.

 

 

"Geosynthetics" is a general term which identifies a broad range of products, such as geotextiles, geomembranes, geogrids, geonets, geocomposites, geomats and many other.

 

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Geosynthetics terminology

 Geosynthetics funcion

GEOGRID

a polymeric structure, unidirectional or bidirectional, in the form of manufactured sheet, consisting of a regular network of integrally connected elements, which may be linked by extrusion, bonding or interlacing, whose openings are larger than the constituents, used in geotechnical, environmental, hydraulic and transportation engineering applications.

Extruded geogrid

a geogrid produced by stretching uniaxially or biaxially an extruded integral structure.

 

Unidirectional geogrid
a geogrid which possesses a much higher tensile strength in one direction (longitudinal or transversal) than in the other direction.


Bidirectional geogrid
a geogrid which possesses similar tensile strength in both longitudinal and transversal direction.

Bonded geogrid

a geogrid produced by bonding, usually at right angles, two or more sets of strands or other elements.

Woven geogrid

a geogrid produced by interlacing, usually at right angles, two or more yarns, filaments or other elements.

GEOMEMBRANE

an essentially impermeable material, in the form of manufactured sheet, which may be synthetic, bituminous or bentonitic, used in geotechnical, environmental, hydraulic and transportation engineering applications.

Synthetic geomembrane

a geomembrane whose main component is a synthetic polymer, like polyethylene, polypropylene, PVC, EPDM or other ones.

 

Bituminous geomembrane

a geomembrane whose main component is a bituminous compound.

 

Bentonitic geomembrane

a geomembrane whose main component is bentonitic clay in powder or granules. This geomembrane is commonly called Geosynthetic Clay Liner or GCL.

GEOCOMPOSITE

an assembled polymeric material, in the form of manufactured sheet or strip, consisting at least of one geosynthetic among the components, used in geotechnical, environmental, hydraulic and transportation engineering applications.

GEONET

a polymeric structure, in the form of manufactured sheet, consisting of a regular network of integrally connected overlapping ribs, whose openings are usually larger than the constituents, used in geotechnical, environmental, hydraulic and transportation engineering applications.

GEOMAT

a polymeric structure, in the form of manufactured sheet, consisting of a non-regular network of fibres, yarns, filaments, tapes or other elements (which may be thermally or mechanically connected), whose openings are usually larger than the constituents, used in geotechnical, environmental, hydraulic and transportation engineering applications.

GEOCELL

a polymeric cellular structure, consisting of a regular open network of connected strips, linked by extrusion or adhesion or other methods, used in geotechnical, environmental, hydraulic and transportation engineering applications.

BIOMAT

a permeable, natural polymeric material, in the form of manufactured sheet, usually constituted of fibers (straw, coconut, sisal or other ones) kept together by one or two layers of synthetic or natural meshes, used in geotechnical, environmental, hydraulic and transportation engineering applications.

BIONET

a permeable, natural polymeric material, in the form of manufactured sheet, consisting of a regular network of knotted or interlaced yarns, whose opening are usually larger than the constituents, used in geotechnical, environmental, hydraulic and transportation engineering applications.

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