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Acceralated filtration test method to assess long-term flow rate behavior of geotextile filters is developed. This method uses a flow colum with the site specific soil above the candidate geotextile and pass the de-aired water through the system under a constant head repeatedly with a period of several minutes. Flow rate measurements are made after several cycles of repeated flow until repetition reaches over 100 times.
This paper presents the res.ults of acceralated filtration testing conducted on four different geotextiles. According to the test results, the reduction ofthe geotextile’s permittivity due to particle clogging and blinding was observed depending on the type of geotextiles and hydraulic gradient. Based on the results of this work, the test proposed was confirmed to be used to evaluate the long-term clogging resistance of geotextile filters.