The Effect of Using Thermally Activated Metakaolin as an Additive on the Properties of Ordinary Portland Cement. Iraqi National Journal of Earth Science (INJES), [S. l.], v. 26, n. 3, p. 27–38, 2026. DOI: 10.33899/injes.v26i3.60956. Disponível em: https://earth.uomosul.edu.iq/index.php/earth/article/view/60956. Acesso em: 3 jul. 2026.