Shaker, H. M. ., Shimaa, M. A. . Moneim, F. . Refaie, and H. S. . Ibrahim. “Valorization of Phosphate Waste Sludge As a Nonhazardous Fire Resistant Material Added to Concrete Mix”. International Journal of Advances in Scientific Research and Engineering (IJASRE), ISSN:2454-8006, DOI: 10.31695/IJASRE, vol. 5, no. 9, Sept. 2019, pp. 178-84, doi:10.31695/IJASRE.2019.33516.