Stress-Strain-Strength Behavior of Lime-Stabilized Soils during Accelerated Curing
Publication: Journal of Materials in Civil Engineering
Volume 25, Issue 12
Abstract
Given the schedule pressure of lime-stabilized soil construction, many agencies specify the use of elevated temperature (e.g., 41°C), shorter duration (e.g., 5–7 days) accelerated specimen curing for unconfined compressive strength () testing and acceptance as a proxy for of specimens normally cured under 28-day 23°C conditions. Moreover, lime and highway transportation industry associations prescribe a unique accelerated curing regime for all lime-stabilized soils (7-day, 41°C). This paper presents the results from a laboratory investigation of stress-strain-strength development of four lime-stabilized soils under 2–8 day 41°C accelerated curing and the 0–28 day 23°C normal curing regime. Specimens cured at 41°C reached values equivalent to 28-day 23°C after 1.8–5.9 days. Accordingly, 7-day 41°C curing overestimates 28-day normal cure by 13–260%. When combined with a detailed analysis of data available in the literature, the results illustrate that the prescription of a unique equivalent accelerated curing regime is oversimplified and can lead to significant overestimation of design .
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Acknowledgments
The authors wish to thank the CDOT Research Division for funding this study, and to the many CDOT personnel and consultants at project sites that helped during this study. We would particularly like to acknowledge Bob LaForce (Yeh & Associates, Inc.), Derek Garben (ARS, Inc.), Nick Andrade (Ground Engineering Consultants, Inc.) and Joels Malama (formerly of Terracon Consultants, Inc.) for their assistance.
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Information & Authors
Information
Published In
Journal of Materials in Civil Engineering
Volume 25 • Issue 12 • December 2013
Pages: 1880 - 1886
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Jun 29, 2012
Accepted: Nov 30, 2012
Published online: Dec 3, 2012
Discussion open until: May 3, 2013
Published in print: Dec 1, 2013
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