Geotextiles Geotech

Geotextiles are two-dimensional textiles used in the building trade that are in contact with loose and consolidated rock. They are usually water and air permeable. 

Geotextiles are expected to be resistant to influences from the soil and the ground-water, that is, against organic and inorganic substances. Therefore geotextiles 

Resistance against Polyester (PES) Polyamide (PA 6/PA 6.6) Polypropylene (PP) Polyethylene (PE) Polyacrylonitrile (PAN) 

Mainly woven fabrics (Chapter 4) and nonwovens (Chapter 6) are used as geotextiles. Today also multiaxial structures such as multiaxial multi-ply warp-knitted fabrics (MAG) or stitch-bonded fabrics (NVG) (Chapter 7) are used more and more in this field of application. The yarns in this process are monofiles, filament yarns (Chapter 2), or spun yarns (Chapter 3). 

The essential tasks of geotextiles are separation, filter, drain, and reinforcement or armor. To fulfill these tasks the geotextiles have to possess different characteristics in response to soil, water, and stress. Table 11.2 presents the main characteristics that are relevant for achieving the main objective. 

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S.K. Bhatia, J.L. Smith, Application of the huhhle point method to the characterization of the pore size distribution of geotextile. Geotech Test J 18 (1) (1995) 94—105. 

J. Mlynarek, J. Lafleur, R. Rollin, G. Lombard, Filtration opening size of geotextiles by hydrodynamic sieving, ASTM Geotech Test J 16 (1) (1993) 61—69. 

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