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Geotextile Filter Design Using Pore Size Distribution
Current geotextile filter design methodologies rely on geotextile apparent opening size (AOS) measurements obtained from ASTM D 4751. Even though a typical geotextile sample has a range of opening sizes, the current standard of practice is to use ASTM D4751 to obtain a single AOS value that is used for filter design of soils with a wide range of particle sizes. The AOS is a property of the geotextile that indicates the approximate largest particle that would effectively pass through the geotextile. It is also commonly referred to as the O95 of the geotextile. In recent years, geotextile pore size distribution (PSD) is being obtained in accordance with ASTM D6767. PSD results yield a spectrum of opening sizes that represent a geotextile’s ability to retain soil particles, as opposed to a single “largest opening size” value that is obtained from AOS testing per ASTM D4751. A new geotextile filter design method using multiple retention criteria has been created through a synthesis of the existing body of knowledge combined with laboratory testing to validate the new design methodology.
Geotextile Filter Design Using Pore Size Distribution
Current geotextile filter design methodologies rely on geotextile apparent opening size (AOS) measurements obtained from ASTM D 4751. Even though a typical geotextile sample has a range of opening sizes, the current standard of practice is to use ASTM D4751 to obtain a single AOS value that is used for filter design of soils with a wide range of particle sizes. The AOS is a property of the geotextile that indicates the approximate largest particle that would effectively pass through the geotextile. It is also commonly referred to as the O95 of the geotextile. In recent years, geotextile pore size distribution (PSD) is being obtained in accordance with ASTM D6767. PSD results yield a spectrum of opening sizes that represent a geotextile’s ability to retain soil particles, as opposed to a single “largest opening size” value that is obtained from AOS testing per ASTM D4751. A new geotextile filter design method using multiple retention criteria has been created through a synthesis of the existing body of knowledge combined with laboratory testing to validate the new design methodology.
Geotextile Filter Design Using Pore Size Distribution
Sack, Richard L. (author) / Sprague, Joel (author) / Kuhn, Jeffrey (author)
Geo-Congress 2023 ; 2023 ; Los Angeles, California
Geo-Congress 2023 ; 486-496
2023-03-23
Conference paper
Electronic Resource
English
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