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Supplementary Cementitious Materials (SCMs) are utilized to partially replace Portland cement in order to enhance both the fresh and hardened properties of concrete. Commonly used SCMs in chloride-exposed environments include C fly ash, F fly ash, Ground Granulated Blast Furnace Slag (GGBFS), and silica fume. SCMs contribute to improved concrete durability, degradation resistance through various mechanisms, and strength development. This study will assess different SCMs using the Pozzolanic Reactivity test and select one for chemical activation. Chemical activation involves applying various chemical agents—such as Ferric Chloride, Potassium Hydroxide, and Sodium Silicate—to alter the physical and chemical properties of SCMs. The performance of the chemically activated SCM in fresh and hardened concrete will be evaluated and compared with standard concrete properties.