Clogging properties of Geotextile filter on permeability test for various geomaterials

A series of constant head permeability test was performed by putting in a geotextile between a geomaterial layer and a gravel layer in order to evaluate an effect of geomaterial on the cross-plane flow performance of geotextile filter. As the geomaterials for this study, Ataka loam, Kanto loam, Rokunohe sand with fine-grained and Muroran sand with fine-grained were prepared. Based on test results, it was found that the cross-plane flow performance of geotextile depended on the relationship between an amount of clogging per unit volume on each geotextile and a percentage passing by mass of soil particle size less than an opening size of geotextile. It is expected that a clogging mass and an amount of clogging per unit volume are affected by a fiber structure of geotextile.