Durability and Recuperative Properties of Lime Stabilized Soils
Publication: Geo-Congress 2023
ABSTRACT
Lime stabilization is used worldwide to enhance the engineering properties of problematic clayey soils; however, exposure to moisture has a detrimental impact on the longevity of lime-stabilized soils. A research study was designed and conducted to investigate the impact of stabilizer dosage and curing time before moisture intrusion on the durability and recuperative properties of lime-treated expansive soils. The soil was treated at optimum and optimum + 2% lime dosages. The stabilized soils’ behavior, before and after capillary soaking, was studied based on the strength and volume change properties of the specimens cured for 0 (6 h), 3, 7, and 28 days. The unconfined compressive strength tests were performed to study strength characteristics after moisture exposure. Furthermore, the soaked specimens were air-dried to pre-soaking moisture contents, cured again, and then tested for strength properties to study the stabilized soils’ recuperative properties. These results were also corroborated by supplementary mineralogical and microstructural studies. Test results indicate that the stabilized soils were able to completely recover from the moisture-induced damage only when exposed to moisture intrusion within a specific time window after treatment, the duration of which was governed by the stabilizer dosage.
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Geo-Congress 2023
Pages: 440 - 451
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Published online: Mar 23, 2023
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