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