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http://dx.doi.org/10.12814/jkgss.2013.12.1.051

Quantitative Evaluation of Geotextile Void Structures Using Digital Image Analysis  

Kim, Duhwan (Samsung C&T Corporation, Civil ENG Center)
Publication Information
Journal of the Korean Geosynthetics Society / v.12, no.1, 2013 , pp. 51-61 More about this Journal
Abstract
This paper presents results from a study undertaken to quantitatively evaluate the geotextile pore sizes using optical image analysis. The evaluation was conducted by observing surfaces of coupons cut from resin-impregnated specimens of geotextile-geomembrane layered under various load conditions. Stereological concepts were applied to collect representative specimens from a series of laboratory tests. The sizes of voids enclosed by filaments were expressed in terms of the largest inscribing opening size (LIOS) distribution. The opening diameter corresponding to the 50% cumulative frequency decreased by about 45mm as the load increased from 10 to 300kPa and recovered to about 90% of its initial state on unloading back to 10kPa. The average void size was reduced by 32 and 16.5% as the geotextile was sheared against a textured geomembrane under normal stresses of 100 and 300kPa, respectively. The results showed how the LIOS distribution varied as a function of normal stress and interface shear displacement against a smooth and a textured geomembrane surfaces.
Keywords
Digital Image Analysis; Geotextile; Geomembrane; Interface Shear; Largest Inscribing Opening Size; Void;
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