Using Woven and Heat-Bonded Geotextiles in Geonet Geocomposites

Traditional geonet geocomposites consist of a geonet core to which is heat laminated a nonwoven needlepunched geotextile on one or both sides. This paper presents engineering properties of new types of geocomposites manufactured using nonwoven heat-bonded and woven geotextiles. Changing the geotextile type is seen to significantly alter the performance characteristics of the geocomposites including filtration properties, transmissivity and flow properties, interface shear strength, ply-adhesion strength and ultraviolet resistance. There are a number of emerging applications of drainage geocomposites, such as bioreactor landfills, pavements, and green roof tops, where these new drainage geocomposites may fulfill the performance requirements better than the traditional nonwoven needlepunched-based drainage composites.