Electric arc furnace slags (EAFS) are by-products of electric steelmaking processes. In 2024, approximately 30% of global steel produced out via the EAF route, generating an estimated 283 Mt of EAFS annually. This volume is expected to rise as major European steel producers continue the electrification of their operations to reduce CO2 emissions. Despite their significant CaO and SiO2 contents, EAFS currently have no established use as supplementary cementitious materials. Th