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Water 2017, 9(9), 660;

Changes of Permeability of Nonwoven Geotextiles due to Clogging and Cyclic Water Flow in Laboratory Conditions

Department of Geotechnical Engineering, Faculty of Civil and Environmental Engineering, Warsaw University of Life Sciences, Nowoursynowska 159 St., 02-776 Warsaw, Poland
Department of Geotechnics and Traffic Infrastructure, Slovenian National Building and Civil Engineering Institute, Dimiceva 12 St., 1000 Ljubljana, Slovenia
Author to whom correspondence should be addressed.
Received: 1 August 2017 / Revised: 23 August 2017 / Accepted: 30 August 2017 / Published: 1 September 2017
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The use of geotextile filters has been a common application in geo-environmental and geotechnical engineering for decades. The purpose of the present paper is to assess the influence of artificial physical clogging and cyclic water flow on the water permeability characteristics of nonwoven geotextiles used commonly in filter and drainage systems. Despite many studies examining the behavior of soil-geosynthetics, the mechanism of physical clogging is not fully understood yet and remains incompletely defined. Artificial clogging and cyclic water flow tests have been conducted according to a procedure created by the authors. Three nonwoven geotextiles and silty sand were employed in the test series. Hydraulic properties of the tested geosynthetics were determined according to the ISO standard. Filter design criteria are also discussed. The paper also presents the changes of water permeability characteristics due to clogging and cyclic water flow. The results show significant decrease of water permeability coefficients of the tested nonwoven geotextiles after artificial clogging and under cyclic water flow. Furthermore, the clogging mechanism was observed and confirmed by three-dimensional computed tomography. View Full-Text
Keywords: nonwoven geotextile; clogging; cyclic flow; permeability; soil nonwoven geotextile; clogging; cyclic flow; permeability; soil

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Miszkowska, A.; Lenart, S.; Koda, E. Changes of Permeability of Nonwoven Geotextiles due to Clogging and Cyclic Water Flow in Laboratory Conditions. Water 2017, 9, 660.

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