Self-compacting concrete is concrete that flows under its own weight and, without the need for any vibration, completely (even with dense rebars), fills the formwork and maintains its homogeneity. Self-compacting concrete must have all three properties of filling, tear-resistant and permeability. To make self-compacting concrete in order to achieve the desired flow, it uses more fine-grained and lubricant additives and the largest size of smaller aggregate than ordinary concrete.
Be. Concrete itself is a brittle material, so different materials are used to make it resistant to tensile and bending, one of which is fiber. The presence of steel fibers in concrete reduces its fragility and increases the formability of concrete. By bridging the breaking concrete, the fibers increase its capacity and even increase its compressive strength. The most widely used fibers in fibrous concretes are steel fibers.
The mechanical properties of hardened concrete and the rheological properties of fresh concrete change with the addition of fibers. In this paper, the mechanical properties and rheology of self-compacting concrete containing different percentages of steel fibers have been investigated. By collecting the experimental results of different researchers, the effect of steel fibers on mechanical properties and rheology has been evaluated. The results show that with increasing steel fibers, the compressive and tensile strength of concrete increases while the performance of concrete decreases.