Influence Of Geotextile Filters On The Discharge Capacity Of Geocomposite Drainage Materials
Jochen Müller-Rochholz, University of Applied Sciences, D-48149 Muenster, Germany
Christian Recker, tBU Institut für textile Bau- und Umwelttechnik, D-48268 Greven
Zori Bronstein, tBU Institut für textile Bau- und Umwelttechnik, D-48268 Greven
Romain Diederich, DuPont de Nemours (Luxembourg) s.àr.l., L-2984 Luxembourg
Extract:
Different geotextile filters are used in combination with drainage cores to form geosynthetic composite materials for drainage applications. These filters vary in manufacturing process and properties and are mostly characterized based on their results in mechanical and hydraulic index testing. Seven nonwoven filters and their effect on the discharge capacity of geocomposite drain material have been analysed. The discharge has been analysed under different loads and in contact with soil. The stress-strain behaviour of the filter has shown a significant influence on the total discharge capacity. Higher energy absorption at 10% stress results in higher retained discharge capacity under load while maximum stress shows no or little influence on the result. The study showed significant differences in stress-strain and energy absorption characteristics for the different geotextile filters.
