Geotextile tubes are increasingly being used for dewatering sediments and other high water content waste. Laboratory tests are often performed to evaluate filtration efficiency and flow rate of geotextile tubes. In this study, pressure filtration tests were conducted on five geotextiles (three woven, one nonwoven, and one composite) and three types of soils. Pore-size characterization of the geotextile materials were measured using Capillary Flow Test. Laboratory test results indicate formation of a “filter cake” during dewatering at the interface of the geotextile material and the sediment slurry. Soil loss is analyzed to investigate the factors influencing retention of sediments. A retention criterion is proposed for the soil sediments tested.
|Published - 2008