Concrete is considered a brittle material, primarily because of its low tensile strength and lowrntensile strain capacity. The low tensile strength of concrete is due to internal flaws and microcracksrnpresent in the concrete. The use of randomly distributed, discrete fibers to improve thernmechanical properties of the matrix is an age-old and intuitive concept. Recently, worldwidernresearches have been devoted to the use of steel fibers recovered from used tyres in concrete.rnThe concrete obtained by adding these fibers evidenced a satisfactory improvement of the fragilernmatrix, mostly in terms of toughness and post cracking behavior. As a consequence steel fibersrnextracted from used tyres appear to be a potential candidate for steel fiber reinforced concrete.rnTo this effect this research work was undertaken aiming to investigate the mechanical behaviorrnof concrete reinforced with steel fibers recovered from used tyres and to quantify the benefitsrnobtained by the concept of SFRC over conventional concrete. For this purpose a bead wirernhaving a diameter of 0.89 mm extracted from burnt used tyres was used and three grades ofrnSFRC namely C-25, C-40 and C-60 were produced incorporating three different volumes of fiberrni.e. 0.5%, 1.0%, and 1.5%. Furthermore each volume fraction enclosed three different fiberrnlengths namely 20mm, 40mm and 60mm. For comparison purposes, plain control samples werernalso considered. The test program included slump test, compressive strength test, impactrnresistance test, flexural tensile strength and toughness tests including load-deflection curve,rndetermination of first-crack point, and toughness index.rnWorkability of fresh concrete was largely influenced by the presence of steel fiber; on the otherrnhand it was unlikely to achieve considerable improvements in compressive strength by steel fiberrninclusion. Due to the addition of fibers, the flexural tensile strength and the post-crack energyrnabsorption capacity were greatly increased. As far as impact test is concerned both the first crackrnand ultimate failure strength were enormously improved. The interesting results confirm thernpromising application of concrete reinforced with steel fibers extracted from used tyres.rnHowever, further, research work is still necessary in order to have a more in-depth understandingrnof the material properties and to evaluate possible practical applications.