The alk. activated geopolymer was utilized to enhance the performance of recycled aggregate (RA) by repairing voids and cracks, thereby meeting the requirements for aggregates in asphalt mixturesThis treatment significantly improved the phys. properties of RA, specifically by reducing water absorption, crushing value, and Los Angeles (LA) abrasion value, ensuring compliance with relevant specifications.Microstructural anal. (XRD, TG, SEM, and EDS) revealed that geopolymer treatment could transform Ca(OH)2 in cement mortar into C-S-H and C-A-H phases, while also forming N-A-S-H gel.These transformations strengthened the interfacial transition zone (ITZ) surrounding the RA, thereby enhancing the crack resistance and fatigue durability of asphalt mixturesConsequently, this method demonstrated significant potential for the effective utilization of RA in asphalt mixtures