Abstract
When the geotextiles are used in drainage applications, the relationship between the opening size of geotextile and soil particle size becomes a essential factor. In this paper there methods have been used to measure the opening size of geotextiles. The results indicate that the method which water drains out and washes soil particles through the geotextile is suitable for needle-punch nonwoven whose opening size is finer than 50μm.
Next, the clogging tests on five geotexile samples with silty sand were carried out, and the test results were compared with the typical filter criteria already formulated by some reseachers.
