Geotextile composite types and applications

This section presents various geotextile composites combined with other geosynthetics and with various soils (Jeon, 2012). 

Flgnre 18.1 Schematic diagram of a geotextile—geogrid composite manufacturing system. 

A main function of geotextile-geonet composite (Fig. 18.2(a)) is drainage these composites are always installed under a confined loading system. When a geotextile-geonet composite is under load, the transmissivity (horizontal water permeability) is decreased by intrusion phenomena, especially needlepunched nonwoven geotextiles. 

Geotextile—bentonite composites are well known as GCLs. They are excellent water-barrier materials. However, a disadvantage of GCLs is that it has an increase in hydraulic conductivity in sea water owing to the swelling mechanism of bentonite. This section introduces how to improve the swelling behavior by modification (Table 18.1). 

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