Quantitative Description of Grain Contacts in a Locked Sand [chapter]

J. Fonseca, C. O'Sullivan, M. R. Coop
2013 Advances in Computed Tomography for Geomaterials  
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 the "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
more » ... 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.
doi:10.1002/9781118557723.ch2 fatcat:jnv4i5e5gjd27nt33vxclkogx4