EFFECT OF METAKAOLIN ON CONCRETE PRODUCED WITH A POZZOLAN. Nigerian Journal of Technology, [S. l.], v. 29, n. 3, p. 5–11, 2009. DOI: 10.4314/njt.293.85. Disponível em: https://mail.nijotech.com/index.php/nijotech/article/view/85. Acesso em: 19 apr. 2026.