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FINE FRACTION FILTRATION TEST TO ASSESS GEOTEXTILE FILTER PERFORMANCE
Journal article   Peer reviewed

FINE FRACTION FILTRATION TEST TO ASSESS GEOTEXTILE FILTER PERFORMANCE

L J Sansone and R M Koerner
Geotextiles and geomembranes, v 11(4-6), pp 371-393
01 Jan 1992
DOI: https://doi.org/10.1016/0266-1144(92)90020-B
Featured in Collection :   UN Sustainable Development Goals @ Drexel

Abstract

Engineering Engineering, Geological Geology Geosciences, Multidisciplinary Physical Sciences Science & Technology Technology
The proper design of the openings of a geotextile filter requires a balance between providing upstream soil particle retention and avoiding excessive geotextile clogging. While this balance can be reasonably achieved quite well for most soil types and hydraulic conditions, it is different when the flowing liquid is turbid (containing a large amount of suspended particles) and/or under high, or dynamic, hydraulic gradients. This paper presents a test method to assess the behavior of individual soil particles in a slurry form as they approach, encounter and interact with a geotextile filter. The paper describes the concept and details of the test method, called the fine fraction filtration (F) test, and presents data on five different geotextiles which were evaluated using three different soil types. It was seen that soils with particle sizes larger than the geotextile's opening structure can build a stable upstream network; soils with particle sizes smaller than the geotextile's opening structure can pass through the geotextile, and intermediate particle size conditions can give rise to excessive clogging. An additional series of tests were conducted using the same five geotextile filters but now using a pre-placed upstream soil filter above the geotextiles. Clogging conditions generally occurred albeit within the soil column rather than within the geotextile. The F3 test is felt to be a meaningful test for those conditions where the upstream soil particles are not in intimate contact with the geotextile filter. In such cases, the test method can probably be considered to be a performance test. For other, more typical soil placement conditions, the test method can be considered to be a very challenging index test.

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9 citations in Web of Science
13 citations in Scopus

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Web of Science research areas
Engineering, Geological
Geosciences, Multidisciplinary
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