@article{R Nuntasarn_W. Wannakul_2016, title={DRAINED SHEAR STRENGTH OF COMPACTED KHON KAEN LOESS}, volume={13}, url={https://geomatejournal.com/geomate/article/view/1265}, abstractNote={<p>The objective of this study was to determine the relationship between drained shear strength<br>and matric suction of compacted Khon Kaen loess. Khon Kaen loess in this study was compacted at 95% by<br>modified method. This soil sample was investigated a soil water characteristic curve (SWCC) from the<br>pressure plate test. Moreover the relationship between drained shear strength and matric suction was<br>determined from the consolidated drained triaxial test (CD Test) under saturated and unsaturated condition.<br>Three saturated specimens were tested to determine an effective friction angle (φ´) and an effective cohesion<br>(c´). Another three unsaturated specimens were tested with various matric suction of 30, 180 and 280 kPa,<br>respectively. The net confining pressures of these specimens were constant at 100 kPa. To determined<br>drained shear strength at unsaturated condition, an effective friction angle (φ´) was assumed to be constant<br>with a matric suction value. The SWCC of compacted Khon Kaen loess showed a bimodal curve. The first<br>air-entry value and the first residual volumetric moisture content was 4 kPa and 20%, respectively. The<br>results of saturated consolidated drained triaxial test (CD Test) presented that an effective friction angle (φ´)<br>and an effective cohesion (c´) was 31 degree and 54 kPa, respectively. Moreover the unsaturated triaxial test<br>showed a linear relationship between drained shear strength and matric suction with the φb angle of 28 degree.<br><br></p>}, number={35}, journal={GEOMATE Journal}, author={R Nuntasarn and W. Wannakul}, year={2016}, month={Nov.}, pages={28–33} }