Today, producing cementitious materials involves the application of the alkali activation technique. Due to the adverse environmental impacts stemming from CO2 emissions associated with traditional cement use for stabilization, alternative alkali activation methods have gained prominence. In addressing these concerns, this study explored the modification of BC soil (BCS) properties through the incorporation of industrial waste, particularly fly ash, along with alkali activation to enhance strength attributes. In this investigation, up to 50% of fly ash (F-Class) (FA), with meager calcium, was introduced into the soil. The activator solution (AS) comprises a blend of sodium metasilicate and caustic soda with an 8-molar concentration. To optimize the alkali-activated mixture’s (AAM) strength characteristics, a 1.5 ratio AS was deemed effective. Subsequent to a curing duration of 28-days, the unconfined compressive strength (UCS) of the stabilized cylindrical mulds exhibited a significant increase. Moreover, noteworthy enhancements were observed in the strength of flexure beam specimens. Unsoaked California Bearing Ratio (CBR) specimens displayed exorbitant resistance to plunger penetration. However, specimens subjected to soaked CBR, wet and dry (WD), and freeze and thaw (FT) conditions of durability check demonstrated failure due to substantial water absorption and notable expansion. Under dry conditions, the stabilized soil exhibited improved strength attributes. Regrettably, these improved qualities did not persist in the presence of moisture. Consequently, it is not recommended that this activation method be employed in moist practical field applications.