Structural Behavior of Reinforced Concrete Beams enhanced with Hybrid steel-polypropylene fiber under Impact Load

Current research involves study the structural behavior of reinforced concrete beams enhanced with steel and polypropylene fibers under the influence of impact load. It has casting concrete cubes of dimensions (150x150x150) mm, concrete prisms of dimensions (100x100x400) mm, concrete cylinders of dimensions (150x60) mm, and reinforced concrete beams of dimensions (150x150x1000) mm, to determine compressive strength, modulus of rupture, and impact strength of both reference and fiber reinforced concrete respectively. It also has studied the effect of adding 3% of super plastisizer, and the combined effect of admixing with silica fume up to 10%, on both reference and fiber reinforced concrete respectively. The results revealed the importance of adding fibers, super plastisizer, and silica fume respectively, on improvement of mechanical properties of both reference and fiber reinforced concrete under the influence of static and impact load at ages of 7 and 28 days.