Mr. Neel P. Patel, and Dr.P.J.Patel. “SAND REPLACEMENT WITH COPPER SLAG ON MECHANICAL PROPERTIES OF CONCRETE”. International Journal of Advance Engineering and Research Development (IJAERD), vol. 3, no. 5, May 2016, pp. 422-8, https://ijaerd.org/index.php/IJAERD/article/view/4774.