| Behaviour of Anisotropic Sand in Compression (9999) | |||||||||
Abstract | |||||||||
| Drained shear tests were conducted on 7.6 cm cubical specimens of Ottawa sand in the modified Universal Triaxial Apparatus. Specimens were prepared by freely depositing saturated sand under water and vibrating in a specimen mould by different inclinations. At the end of isotropic consolidation the specimens were sheared in compression following three stress paths viz. axisymmetric compression (sigma' sub x = sigma' sub y < sigma' sub z), general compression (sigma' sub y < sigma' sub x < sigma' sub z) and plane strain compression (sigma' sub y < sigma' sub x < sigma' sub z and epsilon sub x approximately 0). A strength anisotropy of about 1.1 deg to 1.7 deg was observed in axisymmetric compression but not in plane strain compression. The axial and volumetric strains at a given principal stress ratio are found to increase with increase in deposition angle with the vertical axis of the specimen. With the increase in lateral deviator stress, there is a tendency to increase the brittle nature of failure. (AA) | |||||||||
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