TY - JOUR AU - Imran Khan, AU - Kentaro Nakai, AU - Toshihiro Noda , PY - 2020/01/27 Y2 - 2024/03/29 TI - EXPERIMENTAL RESEARCH ON DEVELOPMENT/DIMINISHING OF ANISOTROPY AND ITS EFFECT ON MECHANICAL BEHAVIOR OF CLAY JF - GEOMATE Journal JA - INTERNATIONAL JOURNAL OF GEOMATE VL - 18 IS - 65 SE - Articles DO - UR - https://geomatejournal.com/geomate/article/view/336 SP - 9-14 AB - <p>Anisotropy refers to the directional dependence of material properties. The knowledge of <br>development/diminishing of anisotropy are very important, to understand the true behavior of naturally deposited <br>soil. The anisotropy of clays and silty clay intimately connected with their structure, which depends on the <br>environmental conditions during which the soil is deposited as well as the stress changes subsequent to <br>deposition. In this paper, triaxial tests were carried out using the vertical and the horizontal extraction specimen <br>of the reconstituted clay and silty clay, for accumulating experimental facts of development of anisotropy during <br>the preliminary consolidation process and the influence of the anisotropy on the shear behavior. Preconsolidation pressure of 200kPa applied to induced initial anisotropy. Undrained shear triaxial test was <br>performed with different isotropic stresses on clay (50 to 1800kPa) and silty clay (50,300 and 600kPa), and <br>undrained shearing was carried out under constant axial strain rate of 0.0056(mm/min). Vertical sample shows <br>larger peak strength as compared to horizontal, because of the development of anisotropy on the compression <br>side. As the confining pressure increases, the difference between peak strength of vertical and horizontal <br>becomes smaller and smaller which indicate that the anisotropy diminished and intensity ratio decreases. By <br>comparing clay and silty clay, silty clay materials lose their anisotropy at lower confining pressure (600kPa) as <br>compared to clay materials (1800kPa). Therefore, the grain sizes have significant effect on the developing and <br>diminishing of anisotropy. Another important fact observed was, critical state index is decreasing and becomes <br>constant as confining pressure increases.</p> ER -