http://www.iaeme.com/IJARET/index.asp 324 editor@iaeme.com International Journal of Advanced Research in Engineering and Technology (IJARET) Volume 11, Issue 10, October 2020, pp. 324-332, Article ID: IJARET_11_10_034 Available online at http://www.iaeme.com/IJARET/issues.asp?JType=IJARET&VType=11&IType=10 ISSN Print: 0976-6480 and ISSN Online: 0976-6499 DOI: 10.34218/IJARET.11.10.2020.034 © IAEME Publication Scopus Indexed INFLUENCE OF POLYPROPYLENE FIBERS ON THE DUCTILITY OF SAND CONCRETE H. Suiffi, A. El Maliki Applied Research Team on Polymers, National School of Electricity and Mechanics (ENSEM), Hassan II University, Casablanca Morocco O. Cherkaoui, M. Dalal Textile Materials Research Laboratory REMTEX School of Textile and Clothing Industries (ESITH) Casablanca Morocco ABSTRACT The appearance of fissures on structural elements has led researchers to develop innovative techniques using synthetic fibers and has triggered a kind of awakening in this area of research. The study of the mechanical behavior of sand concrete mixed with polypropylene (PP) fibers shows that with the incorporation of (PP) fibers into the cementitious matrix, there is some improvement in the ductile behavior of the composite. In our study we tested the composite with different dosages of polypropylene (0.05%, 0.1%, 0.3% and 0.5%), the results showed that the 0.05% fiber dosage in sand concrete with a fiber diameter of 33.2 μm PP gives significant results in terms of flexural tensile strength and a slight improvement in compressive strength compared to the constituent with the same dosage in a sand concrete with a diameter of the PP fiber of 45.5 μm. Key words: Polypropylene fiber, Sand concrete, Mechanical properties, cracks Cite this Article: H. Suiffi, A. El Maliki and O. Cherkaoui, M. Dalal, Influence of Polypropylene Fibers on the Ductility of Sand Concrete, International Journal of Advanced Research in Engineering and Technology, 11(10), 2020, pp. 324-332. http://www.iaeme.com/IJARET/issues.asp?JType=IJARET&VType=11&IType=10 1. INTRODUCTION Concrete is a composite building material made from natural aggregates (sand, chippings) or artificial aggregates (recycled concrete aggregates) agglomerated by a binder (cement, bitumen, clay), as well as adjuvant that modify the physical and chemical properties. When the aggregates used with the binder are reduced to sand, the outcome is called mortar. The granular curve of the sand can be largely optimized, in which case it will be called "sand