COMPARATIVE STUDY OF IKIRUN AND OSOGBO SLAG ON CONCRETE GRADE 20. Nigerian Journal of Technology, [S. l.], v. 38, n. 2, p. 283–288, 2019. Disponível em: https://mail.nijotech.com/index.php/nijotech/article/view/1964. Acesso em: 19 apr. 2026.