Long term characteristics of sustainable concrete incorporating manganese ore tailings and nano-silica as cementitious materialAdesola Adetukasi, Abayomi Afolayan, Ariyo Adanikin, Olaolu Fadugba and Olukayode OlopadeE3S Web Conf., 729 (2026) 03002DOI: https://doi.org/10.1051/e3sconf/202672903002