Cold Mix Asphalt (CMA) is a type of asphalt that doesn’t require heating and can be applied directly from the bag without additional equipment. It is created by blending emulsified bitumen, cutback, or foamed bitumen with unheated aggregates. CMA is commonly utilized for fixing potholes, addressing wheel rutting, utility cuts, and parking lots. Despite its advantages, the problem associated with the use of CMA is the lack of durability. Consequently, it is typically used for temporary solutions or in areas with low traffic volume due to its susceptibility to cracking. Several factors influence its mechanical and durability properties, including aggregate gradation, binder grade, binder content, water content, void content, curing conditions, curing time, and active fillers. Fillers, like Ground Granulated Blast furnace Slag (GGBS) and Alkali Activated GGBS can enhance curing rates and early strength, addressing these issues. This paper explores the use of GGBS and alkali activated GGBS in place of cement as fillers in various proportions, comparing their moisture susceptibility and rutting resistance with conventional mixes. The experimental investigation included Marshall Stability Test, Indirect Tensile Strength Test and Rutting Test. Moreover, a comparison of the Indirect Tensile Strength (ITS) and Tensile Strength Ratio (TSR) between conventional and modified CMA mixes was analyzed. The use of modified fillers significantly improved the moisture resistance which is significant in areas where rainfall is high. Output of this research work will significantly contribute in addressing SDGs like Climate Action, Industry Innovation Infrastructure and Sustainable Cities and Communities.