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Effect of compaction pressure on consolidation behaviour of unsaturated silty soil
Estabragh, A.R. Javadi, Akbar A. Boot, John C.
Estabragh, A.R.
Javadi, Akbar A.
Boot, John C.
Publication Date
2004
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© 2004 NRC Canada. Reproduced in accordance with the publisher's self-archiving policy.
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Abstract
The effect of compaction pressure on subsequent soil behaviour during isotropic consolidation has been investigated
by conducting controlled-suction triaxial tests on samples of an unsaturated compacted silty soil. A comprehensive
set of laboratory experiments was carried out in a double-walled triaxial apparatus on samples of unsaturated
soil that were prepared using two different compaction pressures. The axis translation technique was used for creating
the desired suctions in the samples. In the experiments, the soil samples were subjected to isotropic consolidation under
constant suctions. The results show that different compaction pressures produce different fabrics in a soil and therefore
affect the behaviour of the soil. The results also show that the value of yield stress and the location of the
loading¿collapse (LC) yield curve are functions of soil fabric. Furthermore, it is shown that the slopes of normal consolidation
lines for densely and loosely compacted samples differ in unsaturated conditions but are the same in saturated
soils. A comparison is made between the behaviour of the dense and loose samples, and the difference in the
behaviour is explained.
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Published version
Citation
Estabragh, A.R., Javadi, A.A. and J.C. Boot (2004). Effect of compaction pressure on consolidation behaviour of unsaturated silty soil. Canadian Geotechnical Journal. Vol. 41 No.3, 540-550.
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Article