EXPERIMENTAL INVESTIGATION OF THE STRENGTH PROPERTIES OF CONCRETE PRODUCED WITH VOLCANIC ASH AND METAKAOLIN AS PARTIAL REPLACEMENT OF CEMENT. FUDMA JOURNAL OF SCIENCES, [S. l.], v. 9, n. 6, p. 90–97, 2025. DOI: 10.33003/fjs-2025-0906-3545. Disponível em: http://www.fjsadmin.fudutsinma.edu.ng/index.php/fjs/article/view/3545. Acesso em: 11 sep. 2025.