المجلة الدولية للعلوم والتقنية

In this research, polypropylene fibers were added to concrete mixtures, which is a polymeric material that improves the efficiency of concrete, increases its compressive strength and reduces the phenomenon of cracks and shrinkage. Concrete mixtures have been made without polypropylene fiber additives (reference) and mixtures with the addition of fibers at a ratio of 0.9 kg per cubic meter of concrete and a length of 18 mm with a change in the ratio of water to cement (w/c=0.42 and w/c= 0.61) and also have taken a Slump test and cylindrical samples taken to determine the compressive strength of concrete and tensile. It was found that the compressive strength and tensile of concrete increases for samples added to polypropylene fibers as well as when the ratio of w⁄c decreases. We recommend doing new studies by adding different percentages of polypropylene fibers and different percentages of the amount of water to cement to know the compressive strength behavior of concrete. Keywords: Polypropylene Fibers – concrete mixture - a polymeric material - cracks and shrinkage –reference – slump test –water cement ratio – compressive strength.