EFFECTS OF VARIABILITY IN THE POZZOLANIC PROPERTIES OF RICE HUSK ASH (RHA) ON THE COMPRESSIVE STRENGTH OF CONCRETE. Nigerian Journal of Technology, [S. l.], v. 35, n. 4, p. 694–698, 2016. DOI: 10.4314/njt.354.1197. Disponível em: https://www.nijotech.com/index.php/nijotech/article/view/1197. Acesso em: 15 jan. 2026.