Azunna, S. U. ., and J. C. . Okolo. “Compressive Strength of Concrete With Granite Powder As a Partial Replacement of River Sand”. Acta Technica Napocensis: Civil Engineering & Architecture, vol. 62, no. 2, Mar. 2020, pp. pp. 44-65, //actacivil.utcluj.ro/actacivil/article/view/16.