SEDL / STP / STP1081-EB / STP19039S

Long-Term Clogging Behavior of Non-Woven Geotextiles with Silty and Gap-Graded Sands

Bhatia, SK
Associate Professorgraduate assistant, Syracuse UniversityWoodward Clyde ConsultantsSyracuse University, SyracuseGaithersburgSyracuse, NYMDNY

Qureshi, S
Associate Professorgraduate assistant, Syracuse UniversityWoodward Clyde ConsultantsSyracuse University, SyracuseGaithersburgSyracuse, NYMDNY

Kogler, RM
Associate Professorgraduate assistant, Syracuse UniversityWoodward Clyde ConsultantsSyracuse University, SyracuseGaithersburgSyracuse, NYMDNY

Pages: 14    Published: Jan 1990

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Abstract

Non-woven geotextiles are generally used for the protection of synthetic liners in sanitary landfills. In this application the geotextiles perform as a filter and drain for the leachate collection system. Since geotextiles play a major role in landfill design, they should be properly selected to obviate any clogging problems. Filtration criterion for the non-woven geotextiles are still evolving. The existing filter criteria are not applicable for silty and gap-graded soils. In this paper, the results are presented for six different nonwoven geotextiles which are tested with eighteen different gap-graded soils to evaluate long-term filtration behaviors. Microstructure analysis results are provided for a better understanding of the clogging mechanism of non-woven geotextiles.