CLC number: TU4
On-line Access:
Received: 2006-10-10
Revision Accepted: 2007-02-20
Crosschecked: 0000-00-00
Cited: 12
Clicked: 5815
ZHAN Liang-tong, CHEN Ping, NG C.W.W.. Effect of suction change on water content and total volume of an expansive clay[J]. Journal of Zhejiang University Science A, 2007, 8(5): 699-706.
@article{title="Effect of suction change on water content and total volume of an expansive clay",
author="ZHAN Liang-tong, CHEN Ping, NG C.W.W.",
journal="Journal of Zhejiang University Science A",
volume="8",
number="5",
pages="699-706",
year="2007",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.2007.A0699"
}
%0 Journal Article
%T Effect of suction change on water content and total volume of an expansive clay
%A ZHAN Liang-tong
%A CHEN Ping
%A NG C.W.W.
%J Journal of Zhejiang University SCIENCE A
%V 8
%N 5
%P 699-706
%@ 1673-565X
%D 2007
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.2007.A0699
TY - JOUR
T1 - Effect of suction change on water content and total volume of an expansive clay
A1 - ZHAN Liang-tong
A1 - CHEN Ping
A1 - NG C.W.W.
J0 - Journal of Zhejiang University Science A
VL - 8
IS - 5
SP - 699
EP - 706
%@ 1673-565X
Y1 - 2007
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.2007.A0699
Abstract: A laboratory study was carried out on both natural and compacted specimens to investigate the complex soil-water interaction in an unsaturated expansive clay. The laboratory study includes the measurement of soil-water characteristic curves, 1D free swelling tests, measurement of swelling pressure and shrinkage tests. The test results revealed that the air-entry value of the natural specimen was quite low due to cracks and fissures present. The hydraulic hysteresis of the natural specimen was relatively insignificant as compared with the compacted specimen. Within a suction range 0 to 500 kPa, a bilinear relationship between free swelling strain (or swelling pressure) and initial soil suction was observed for both the natural and compacted specimens. As a result of over-consolidation and secondary structures such as cementation and cracks, the natural specimens exhibited significant lower swelling (or swelling pressure) than the compacted specimen. The change of matric suction exerts a more significant effect on the water phase than on the soil skeleton for this expansive clay.
[1] ASTM, 2000. Annual Book of ASTM Standards. American Society for Testing and Materials. West Conshohocken, PA.
[2] Brackley, I.J.A., 1975. Swell Under Load. Proceeding of 6th Region Conference for Africa SMFE, 1:65-70.
[3] Gens, A., Alonso, E.E., 1992. A framework for the behavior of unsaturated expansive clays. Canadian Geotechnical Journal, 29:1013-1032.
[4] Hillel, D., 1998. Environmental Soil Physics. Academic Press, San Diego, CA, USA.
[5] Liu, T.H., 1997. Problems of Expansive Soils in Engineering Construction. Architecture and Building Press of China, Beijing (in Chinese).
[6] Nelson, J.D., Miller, D.J., 1992. Expansive Soils―Problems and Practice in Foundation and Pavement Engineering. John Wiley & Sons, Inc.
[7] Ng, C.W.W., Pang, Y.W., 2000. Influence of stress states on soil-water characteristics and slope stability. Journal of Geotechnical and Geoenvironmental Engineering, ASCE, 126(2):157-166.
[8] Ng, C.W.W., Zhan, L.T., Bao, C.G., Fredlund, D.G., Gong, B.W., 2003. Performance of an unsaturated expansive soil slope subjected to artificial rainfall infiltration. Géotechnique, 53(2):143-157.
[9] Romero, E., Vaunat, J., 2000. Retention Curves of Deformable Clays. Experimental Evidence and Theoretical Approaches in Unsaturated Soils, Balkema, Rotterdam, p.91-108.
[10] Sridharan, A., Prakash, K., 2000. Classification procedures for expansive soils. Proc. Instn. Civ. Engrs. Geotech. Engeng., 143:235-240.
[11] Vanapalli, S.K., Fredlund, D.G., Pufahl, D.E., 1999. The influence of soil structure and stress history on the soil-water characteristic of a compacted till. Géotechnique, 49(2):143-159.
[12] Wang, B., 2000. Stress Effects of Soil Water Characteristics Curve on Slope Stability in Expansive Soils. Mphil Thesis, the Hong Kong University of Science and Technology, Hong Kong, China.
[13] Zhan, L.T., 2003. Field and Laboratory Study of an Unsaturated Expansive Soil Associated with Rain-induced Slope Instability. Ph.D Thesis, the Hong Kong University of Science and Technology, Hong Kong, China.
[14] Zhan, L.T., Ng, C.W.W., 2006. Shear strength characteristics of an unsaturated expansive clay. Canadian Geotechnical Journal, 43(7):751-763.
Open peer comments: Debate/Discuss/Question/Opinion
<1>