Swelling Behavior Evaluation of a Lime-Treated Expansive Soil through Centrifuge Test
Publication: Journal of Materials in Civil Engineering
Volume 29, Issue 12
Abstract
The main objectives of this research are to investigate the effect of hydrated lime (HL) treatment on the swelling behavior of a natural expansive soil, Eagle Ford clay from Texas, through centrifuge testing. So far, no studies have been performed using the centrifuge to analyze the swelling reduction in expansive soils by stabilization treatments. Also, no studies have measured the improvement of lime treatment efficiency due to variables controlled during preparation of lime-soil mixtures, such as compaction moisture content, compaction dry density, and the applied effective stress. From the analysis of the swelling versus time curves, three values were defined to examine the swelling behavior: the swelling potential (Sp), the primary swelling slope (PSS), and the secondary swelling slope (SSS). Assessment of the lime treatment efficiency, as quantified by the swelling potential reduction ratio (SPR) indicates that lime dosage requirements can be decreased by increasing the compaction moisture content and/or reducing the compaction dry density. Also the hydrated lime dosage needed to prevent swelling depends on the applied g-level (i.e., applied stress).
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Acknowledgments
The authors are grateful for the financial support from the Brazilian government: (1) National Council for Scientific and Technological Development (CNPq), for the scholarships (Doctorate and Research Productivity), and Universal Research Project and (2) Coordination for the Improvement of Higher Level or Education Personnel (CAPES), for the sandwich doctorate scholarship to develop this study. Support received by the Texas Department of Transportation and the National Science Foundation is also gratefully acknowledged.
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Published In
Journal of Materials in Civil Engineering
Volume 29 • Issue 12 • December 2017
Copyright
©2017 American Society of Civil Engineers.
History
Received: Dec 4, 2016
Accepted: May 31, 2017
Published online: Oct 4, 2017
Published in print: Dec 1, 2017
Discussion open until: Mar 4, 2018
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