In present work possibility to obtain high performance steel fiber reinforced concrete (showing high mechanical tensile strength and stiffness properties) is under investigation. Different types of commercially available fibers (having different geometry) were observed. After numerous experiments, were executed, the mix design basic principles for fiberconcrete with high content of fibers were elaborated. More than 50 fiberconcrete mixes were investigated and comprehensively analyzed with the goal to find material with simultaneously optimal rheological and strength behavior. The experiments resulted in acquisition of close to self-compacting concrete for mix with fiber content over 300 kg/m3. Bending tests were performed for 10x10x40cm and 15x15x60cm prisms and stress - strain diagrams (measuring applied load, deflection and crack mouth opening displacement) for fiber reinforced concrete were obtained. Investigation results are opening possibility to use this material in constructions subjected to bending forces without traditional reinforcement.