Gholizadeh, Hamid, and Samad Dilmaghani. “The Study of Mechanical Properties of High Strength Concrete Containing Steel and Polypropylene Fibers”. Civil Engineering Journal 4, no. 1 (January 1, 2018): 221–230. Accessed March 17, 2026. https://www.civilejournal.org/index.php/cej/article/view/410.