EFFECTS OF COMPRESSIVE STRENGTH AND FIBER CONTENT ON FLEXURAL TOUGHNESS OF STEEL FIBER REINFORCED CONCRETE

摘要

This paper describes the experimental results of flexural behavior of steel fiber reinforced concrete (SFRC) different with compressive strength and fiber content. The compressive strength of SFRCs varied between 40 and 110 MPa and the hooked fibers with three volume fraction of 0.5, 1.0 and 1.5%. As expected, it was found that addition of steel fiber provided greatly increases on modulus of rupture and flexural toughness of SFRC. On the other hand, due to the higher fracture energy at initial cracking, the ductility and toughness index of high-strength SFRC were decreased.