Stability Behavior of Lime Stabilized Gypseous Soil under Long-Term Soaking
Publication: IACGE 2013: Challenges and Recent Advances in Geotechnical and Seismic Research and Practices
Abstract
This paper aims to study the effect of long-term soaking and leaching on the stability properties of fine-grained soil with and without gypsum content, in relation to changes of the mechanical properties and permeability. The soil samples were stabilized with 3% lime and cured for 28 days at 20°C. The cured samples were subjected to soaking for different period extended to 180 days. Also, permeability values of stabilized and unstabilized soil samples were measured under 30 days of leaching. Results showed that the long-term soaking has strong effect on the unconfined compressive strength, wave velocity and volume change of the stabilized soil samples. These properties are degraded when compared with initial properties of the unsoaked samples. Moreover, the results indicate that an increase in gypsum content have significant effects on stability properties of soil samples. The leaching test revealed a marked increase in permeability values of unstabilized soil samples and, to a lesser extent, in the permeability of stabilized samples. The results also showed that the permeability of soil samples is highly related to the quantity of gypsum during the leaching test; however, the lower the gypsum content, the lower the permeability.
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© 2013 American Society of Civil Engineers.
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Published online: Nov 12, 2013
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