Stabilization of Arsenic-Bearing Sludges Using Lime
Publication: Journal of Materials in Civil Engineering
Volume 18, Issue 2
Abstract
The shear strength of an arsenic bearing sludge derived from gold mining was evaluated as a function of lime content. Lime was used as a physico-chemical stabilization agent of this waste to enhance slope stability and increase site storage capacity. Shear strength characteristics of the sludge before and after lime stabilization were obtained through unconsolidated undrained triaxial tests performed at lime content weight percentages of 0, 5, 10, and 20%. The shear strength testing results show an increase in cohesion from 5 kPa at 0% lime content, to 27 kPa at 20% lime content. Slope stability analysis indicates that stabilization of the sludges improves storage capacity by 43%. This represents an increase from (0% lime content) to (20% lime content). Thus the addition of lime is effective in improving the shear strength and storage capacity of arsenic bearing sludge.
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Acknowledgments
The writers express their gratitude to the Universidade Federal de Minas Gerais, Brazil, the Civil Engineering School—Universidade do Porto, Portugal, and the Faculdade de Agrimensura de Minas Gerais, Brazil for their support on this project.
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Information & Authors
Information
Published In
Journal of Materials in Civil Engineering
Volume 18 • Issue 2 • April 2006
Pages: 135 - 139
Copyright
© 2006 ASCE.
History
Received: Feb 11, 2005
Accepted: Jul 29, 2005
Published online: Apr 1, 2006
Published in print: Apr 2006
Notes
Note. Associate Editor: Hilary I. Inyang
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