Suitability Assessment of Using Lime Sludge for Subgrade Soil Stabilization
Publication: Journal of Materials in Civil Engineering
Volume 34, Issue 3
Abstract
Although several studies have been conducted regarding the use of lime sludge (LS) in engineering and agricultural applications, its use for stabilizing subgrade soils has not been fully investigated. In this study, an effort was made to evaluate the suitability of using LS alone or in combination with traditional stabilizers [fly ash and portland cement (PC)] to stabilize a frost-susceptible loess soil (LOE). A series of unconfined compression (UC), pH, and freeze-thaw (F-T) tests, as well as scanning electron microscopy (SEM), were performed for the evaluation. Test results indicated that using LS alone effectively improved the unconfined compressive strength (UCS) of the soil. In addition, using LS in combination with fly ash yielded further improvements in the UCS of the soil compared with using only fly ash for stabilization. Alternatively, using LS in combination with PC improved the UCS of the soil to a lesser extent than using PC alone for stabilization. In all the cases, the presence of LS in the soil matrix reduced the F-T durability.
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Data Availability Statement
Some or all data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request.
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Published In
Journal of Materials in Civil Engineering
Volume 34 • Issue 3 • March 2022
Copyright
© 2021 American Society of Civil Engineers.
History
Received: Mar 8, 2021
Accepted: Jul 22, 2021
Published online: Dec 28, 2021
Published in print: Mar 1, 2022
Discussion open until: May 28, 2022
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