Strength Development of Alkali Activator Treated Clayey Sand Soils

Authors : Tugba Eskisar

Volume/Issue : Volume 4 - 2019, Issue 12 - December

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The focus of this study is the alkali activator treated clayey sand soils under different curing periods. The unconfined compressive strength developments due to this process were investigated. The specimens were subjected to curing periods varying between 7 and 90 days. The effects of activator type, alkali activator application method, curing period and the effect of 3 cycles of freeze-thaw on the unconfined compressive strength of the soils were determined. It has been found that different alkali activator types affect the success of application method. Longer curing periods also helped to increase the strength of the specimens. The untreated clay specimens showed an unconfined compressive strength of 316 kPa, however, with proper treatment application method 2895 kPa was observed after 90 days. The application of 3 freeze-thaw cycles, decreased the strength of the soils. Major loss of strength rate observed was 46%.

Keywords : Clayey Sand; Alkali Activator; Freeze-Thaw; Unconfined Compressive Strength.


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