Journal
ENGINEERING GEOLOGY
Volume 164, Issue -, Pages 36-49Publisher
ELSEVIER
DOI: 10.1016/j.enggeo.2013.06.011
Keywords
Oedometer; Clay; Sand; Particle characteristics (size, shape); Pore fluid
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Sand-clay mixtures can be considered as a composite matrix of coarser and finer particles. Nature of the interaction between coarser (sand) and finer (clay) particles can be demonstrated using intergranular void ratio (e(s)), and transition fines content (FCt). The common aspect of the intergranular void ratio equations is based on the determination of an empirical relationship between es and effective stresses (sigma'), fines content (FC), and void ratio (e). However, there is a lack of theoretical basis for determining consistent e(s) and FCt values. This paper presents an investigation carried out to relate the various sizes (0.3 mm-0.6 min; 1.0 mm-2.0 mm) and shapes (R = 0.43, S = 0.67; R = 0.16, S = 0.55) of sands with clay in different viscosity pore fluids (0.94 mm(2)/s; 10.65 mm(2)/s) to compressional behaviour by determining e, and FCt values. Oedometer tests performed during this investigation indicate that the higher viscosity pore fluid in a specimen could cause a lower compressibility, and the sand with lower roundness (R) and sphericity (S) values exhibit higher FCt and Cc-s values. (C) 2013 Elsevier B.V. All rights reserved.
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