Geosynthetics

Geosynthetics (GSY) are construction products, at least one of whose components is made from a synthetic or natural polymer material, in the form of a sheet, a strip or a three-dimensional structure.

These products are employed in geotechnical applications, where they are installed appropriately in contact with the adjacent soil. The generic term geosynthetics comprises product groups such as geotextiles, geogrids, drainage mats, geosynthetic barriers and geosynthetic erosion control products. The functions of these products are separation, filtration, drainage, reinforcement, protection, barrier function and surface erosion control.

In many fields of application, such as in landfill construction, geosynthetics take over the major barrier function. In this application, the long-term behaviour is to be proved for more than 100 years. Therefore appropriate tests and inspections are essential.

We offer testing, product certification and product inspection according to standards and guidelines. In addition to the specific testing stands, various harmonised standards and standards for CE certification apply to geosynthetics.

Here you will find an overview of the most important geosynthetics and on the related web pages their characteristic test methods:

Nonwoven geotextiles (GTX-N) are made of directionally or randomly orientated fibres, filaments or other elements. They might be mechanically, thermally or chemically bonded.

Woven geotextiles (GTX-W) are produced by interlacing two or more sets of yarns, filaments, tapes or other elements.

Knitted geotextiles (GTX-K) are produced by interlooping one or more yarns, filaments or other elements.

Geogrids (GGR) have a planar, polymeric structure consisting of a regular open network of integrally connected, tensile elements, which may be linked by extrusion, bonding or interlacing, whose openings are larger than the constituents.

Geonets (GNT) consist of parallel sets of ribs overlying and integrally connected with similar sets at various angles.

Geomats (GMA) are three-dimensional, permeable structures, made of polymeric monofilaments und sometimes other elements of synthetic or natural origin, which are bonded mechanically, thermally, chemical and/or otherwise.

Geocells (GCE) own a three-dimensional, permeable, polymeric honeycomb or similar cellular structure. They are made of linked strips of geosynthetics.

Geostrips (GST) are polymeric strips with a width of not more than 200 mm, used in contact with soil and/or other materials in geotechnical and civil engineering applications.

Geospacer (GSP) are three-dimensional polymeric structures designed to create an air space in soil e. g. in geotechnical and civil engineering applications.

Polymeric geosynthetic barriers (GBR-P) are factory-assembled structures of geosynthetic materials in the form of a sheet which acts as a barrier. The barrier function is essentially fulfilled by polymers. They are used for geotechnical applications and construction engineering e. g. with soil contact.

Clay geosynthetic barriers (GBR-C) are factory-assembled geosynthetic materials wich act as a barrier. This barrier function is essentially fulfilled by clay. They are used for geotechnical applications and construction engineering e. g. with soil contact.

Bituminous geosynthetic barriers (GBR-B) are factory-assembled structures of geosynthetic materials in form of a sheet which acts as a barrier, which is essentially fulfilled by bitumen. They are used for geotechnical applications and construction engineering e. g. with soil contact.

Geocomposites for drainage (GCD) are prefabricated drainage products with a dewatering function. They consist at least of a geotextile and are additionally supported by a filter skin like a geonet or geospacer.

Geocomposites for reinforcement (GCR) are assembled structures of dissimilar geosynthetic materials used for soil reinforcement with at least one component being a geosynthetic.

Geofoam (GFO) is a material with a threedimensional structure, produced of lightweight foamed polymer, usually expanded or extrudes polystyrene. It is used for geotechnical applications and construction industry.

Geosynthetic erosion control products (GEC) include different products like erosion control mats, erosion control blankets or fascine, produced by polymeric and/or synthetic materials. Their function is erosion control. They might be temporary degradable or long-term non degradable.

Products for green roofs play a big role for a green city. Their functions are on the one hand to protect the roofs against roots and on the other hand to provide soil, nutrients and water for the plants.
 

 

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