The possibility of confronting unsuitable soils in the construction site prompted the engineers to find a way to change inappropriate features of the natural soils. The process of changing the natural soil properties is referred to as soil improvement. Since the used soil from the site is exposed to sequential freeze and thawing conditions, it affects the mechanical and physical properties of the natural soil, leading to a reduction in strength and increase in volume change and mass loss. In this study, the effect of lignosulfonate (2% weight ratio of soil as an optimum content), stabiliser and PP fibers (0, 0.4, and 0.8% weight ratio of stabilised soil) as reinforcement on the freeze-thaw durability of clayey sand was investigated. For this purpose, unconfined compressive strength, durability, ultrasonic pulse-velocity, Atterberg limits and, standard compaction tests have been performed. First, the effect of the lignosulfonate addition and optimal content (0,1,2,3,4%) in different curing times (2,7 and 28 days) to natural soil has been investigated. Then freeze and thaw cycles have been performed on both lignosulfonate treated and untreated soils. Also, to improve the lignosulfonate tread soil behaviour, the addition of fiber with different content (0.4 and 0.8%) with a length of 12 mm has been investigated. The results of this study showed that the addition of lignosulfonate improves the durability of clayey sand. The stabilised samples containing 2% lignosulfonate resisted 12 freeze-thaw cycles, and the sample behaviour was improved by adding 0.4 and 0.8% fiber to the stabilised samples. By increasing the freeze and thaw cycles, the strength and stiffness of the samples decrease gradually until the cycle number gets to the critical value of steady-state of soil behaviour, which is 12 cycles. Hence, the lignosulfonate-stabilised samples exhibited acceptable behaviour under Freeze-thaw durability cycles. This indicates that a lignosulfonate stabiliser is appropriate in the areas where there is a potential for frost and exhibits good behaviour. Furthermore, the results of ultrasonic pulse velocity (UPV) tests showed that it could be used as a non-destructive test to control the durability of lignosulfonate-stabilised soils.