Predicting the Erosion Rate of Chemically Treated Soil Using a Process Simulation Apparatus for Internal Crack Erosion
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 134, Issue 6
Abstract
Chemical stabilization is an effective ground improvement technique for controlling erosion. Two stabilizers, lignosulfonate and cement, were used to study how effectively they could stabilize erodible silty sand collected from Wombeyan Caves, NSW, Australia. To conduct this research, four dosages of cement (0.5, 1, 1.5, and 2%) and four dosages of lignosulfonate (0.1, 0.2, 0.4, and 0.6%) by dry weight of soil were selected. All treated and untreated soil specimens were compacted to 90 and 95% of their maximum dry density to study the effect of compaction level on erodibility. The erosion characteristics of treated and untreated soil samples were investigated using a process simulation apparatus for internal crack erosion designed and built at the University of Wollongong. The findings of this study indicated that both chemical stabilizers increased the resistance to erosion because of their cementing properties. It was also found that the critical shear stress increased linearly with the amount of stabilizer, and the coefficient of soil erosion decreased as a power function of the critical shear stress.
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Acknowledgments
The writers express their gratitude to Ian Laird and Alan Grant, geotechnical laboratory technicians at the University of Wollongong for their assistance in setting up the PSAICE. The initial support for this research provided by the Chemstab Consulting Pty. Ltd, Australia is also acknowledged.
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Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 134 • Issue 6 • June 2008
Pages: 837 - 844
Copyright
© 2008 ASCE.
History
Received: Oct 24, 2006
Accepted: Sep 21, 2007
Published online: Jun 1, 2008
Published in print: Jun 2008
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