Soil–Water Transfer Mechanism for Solidified Dredged Materials
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 133, Issue 5
Abstract
The paper presents a study of the soil–water transfer mechanism for solidified dredged materials. Soil–water consists of free water, bound water, and hydration water. The resulting hydrates change the soil–water composition in a cement-based solidification process. A soil–water transfer model is postulated to explain the relationship between soil–water composition and cement content. The test results of solidified specimens cured after 7 and 28 days showed that the hydration water increases linearly with the cement content, and the bound water increases nonlinearly with the cement content. There exists a threshold cement content beyond which the free water is eliminated from the solidified specimen. Further, the model is used to predict the mechanical behavior of the solidified dredged materials. Below the threshold cement content, the unconfined compressive strength may be related to the bound water content. Above the threshold cement content, the shear strength may be related to the hydration water content. In addition, brittle stress-strain behavior commences when the incremental increase of bound water content begins decreasing.
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Acknowledgments
This study is jointly sponsored by the Open Research Fund of State Key Laboratory of Hydrology, Water Resources and Hydraulic Engineering, Hohai University and the National Natural Science Foundation of China through Grant No. NNSFC50379011. The diffraction tests were conducted by Professor Li Gang in the Testing and Analysis Center, Nanjing Normal University. Their support is gratefully acknowledged.
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Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 133 • Issue 5 • May 2007
Pages: 588 - 598
Copyright
© 2007 ASCE.
History
Received: Aug 25, 2005
Accepted: Nov 14, 2006
Published online: May 1, 2007
Published in print: May 2007
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