Quantitative Description of Grain Contacts in a Locked Sand

Fonseca, J., O'Sullivan, C. & Coop, M. R. (2010). Quantitative Description of Grain Contacts in a Locked Sand. In: A. H. Reed (Ed.), Advances in Computed Tomography for Geomaterials: GeoX 2010. (pp. 17-25). Wiley. ISBN 9781848211797

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Quantifying the fabric of intact soil is of great importance in both geomechanics and geology. A unique and interesting example of fabric can be found in “locked sands”. These geologically old sands are characterized by significant grain interlocking and a low cement content. They can be sampled with minimal fabric disturbance. This study analyzes images acquired by x-ray microtomography of resin impregnated samples of a natural sand, Reigate Silver Sand part of the Folkestone Bed formation from southeast England. 2D and 3D image analyses were carried out to identify the grain-grain contacts and quantify individual contact areas. In contrast to earlier studies that have focused on the coordination number, this work demonstrates that for non-punctual contacts a measure of fabric that considers the contact area may be more appropriate.

Item Type: Book Section
Additional Information: © ISTE Ltd, 2010
Uncontrolled Keywords: granular material, fabric, contacts, image analysis, locked sands
Divisions: School of Engineering & Mathematical Sciences > Engineering
URI: http://openaccess.city.ac.uk/id/eprint/3921

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