TY - GEN
T1 - Examination of critical state for unsaturated soils using the suction stress in unconfined compression test
AU - Kim, B. S.
AU - Kato, S.
AU - Park, S. W.
PY - 2012/11/27
Y1 - 2012/11/27
N2 - In order to evaluate the characteristic of shear behavior for unsaturated soil under the low confining pressure, a series of the unconfined compression test and the constant water content compression test were carried out using compacted silty clay. This study then examined the effect of the compaction energy according to the variation of the number of compaction times. The negative pore water pressure and the volume change of specimen during shearing were measured under the undrained condition. The peak strength, the post peak strength and the deformation behavior were also examined. As a result, it was found that the post peak strength states are arranged on the failure line of saturated state by considering the suction stress (ps) as a stress component in (pnet+ps, q) space regardless of the compaction energy. The state boundary surface could also be observed in the relationship between the stress ratio, (q/(pnet+ps)) and the specific volume. Therefore, these results can be interpreted that the critical state for unsaturated soil exists in the unconfined compression test under the low confining pressure.
AB - In order to evaluate the characteristic of shear behavior for unsaturated soil under the low confining pressure, a series of the unconfined compression test and the constant water content compression test were carried out using compacted silty clay. This study then examined the effect of the compaction energy according to the variation of the number of compaction times. The negative pore water pressure and the volume change of specimen during shearing were measured under the undrained condition. The peak strength, the post peak strength and the deformation behavior were also examined. As a result, it was found that the post peak strength states are arranged on the failure line of saturated state by considering the suction stress (ps) as a stress component in (pnet+ps, q) space regardless of the compaction energy. The state boundary surface could also be observed in the relationship between the stress ratio, (q/(pnet+ps)) and the specific volume. Therefore, these results can be interpreted that the critical state for unsaturated soil exists in the unconfined compression test under the low confining pressure.
KW - Constant water content compression test
KW - Critical state
KW - Low confining pressure
KW - Suction stress
KW - Unconfined compression test
KW - Unsaturated soil
UR - http://www.scopus.com/inward/record.url?scp=84869765945&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84869765945&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:84869765945
SN - 9781622762644
T3 - 5th Asia-Pacific Conference on Unsaturated Soils 2012
SP - 195
EP - 200
BT - 5th Asia-Pacific Conference on Unsaturated Soils 2012
T2 - 5th Asia-Pacific Conference on Unsaturated Soils 2012
Y2 - 29 February 2012 through 2 March 2012
ER -