<p>The growing emphasis on sustainable construction has led to a search for eco-friendly alternatives to traditional binders, with geopolymer concrete emerging as a key solution. This study uniquely explores the combined use of alccofine and copper slag in Class F fly ash-based geopolymer concrete, optimized through the Taguchi experimental design under ambient curing conditions, thereby addressing critical mechanical strength challenges in the absence of thermal curing. Using the Taguchi method for optimization, the study investigates the influence of alccofine percentage, sodium silicate to sodium hydroxide (Na₂SiO₃/NaOH) ratio, and copper slag content on GPC properties. An L16 orthogonal array was employed to minimize experimental trials while examining compressive strength, splitting tensile strength, and workability (slump) of the resulting GPC. The results revealed that a mix with 40% alccofine, a Na₂SiO₃/NaOH ratio of 2.5, and 30% copper slag achieved the maximum compressive strength of 45.80&#xa0;MPa. Optimal tensile strength was observed at 40% alccofine, a Na₂SiO₃/NaOH ratio of 3.0, and 10% copper slag. In terms of workability, the highest slump value was attained with 20% alccofine, indicating superior flow properties. These findings demonstrate the potential of alccofine and copper slag to enhance GPC performance, particularly in ambient curing conditions, providing a sustainable substitute for upcoming concrete materials.</p>