BEHAVIOUR OF PERIWINKLE SHELL ASH BLENDED CEMENT CONCRETE IN SULPHURIC ACID ENVIRONMENT. Nigerian Journal of Technology, [S. l.], v. 37, n. 2, p. 315–321, 2018. DOI: 10.4314/njt.372.1661. Disponível em: https://www.nijotech.com/index.php/nijotech/article/view/1661. Acesso em: 12 may. 2026.