“EFFECT OF PKN-30% CHEMICAL ADDITIVE ON CONCRETE COMPRESSIVE STRENGTH”. International journal of artificial intelligence, [S. l.], v. 6, n. 5, p. 1657–1661, 2026. Disponível em: https://www.academicpublishers.org/journals/index.php/ijai/article/view/13530.. Acesso em: 9 jul. 2026.