The paper presents the results of an interlaboratory research concerning the drainage capacity of geosynthetics, in view of their use in drainage systems. Different types of geosynthetics (i.e. geotextiles, geocomposites and geonets) were submitted to radial and unidirectional flow conditions in order to evaluate short-term and long-tenr1 flow capacity behaviour, by using different devices. Preliminary results on compressive creep are also presented.
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