COMPRESSIVE STRENGTH BEHAVIOUR OF CONCRETE PRODUCED USING OKIGWE RED LUMP STONE AS COARSE AGGREGATE. Journal of Engineering Studies and Research, [S. l.], v. 24, n. 2, p. 7–14, 2018. DOI: 10.29081/jesr.v24i2.56. Disponível em: https://jesr.ub.ro/journal/article/view/56. Acesso em: 13 sep. 2025.