Self-compacting concrete incorporating steel and polypropylene fibers: Compressive and tensile strengths, moduli of elasticity and rupture, compressive stress–strain curve, and energy dissipated under compression

Fiber-reinforced self-compacting concrete (FRSCC) is a high-performance building material that combines positive aspects of fresh properties of self-compacting concrete (SCC) with improved characteristics of hardened concrete as a result of fiber addition. Considering these properties, the application ranges of both FRSCC and SCC can be covered. A test program is carried out to develop information about the mechanical properties of FRSCC. For this purpose, four SCC mixes – plain SCC, steel, polypropylene, and hybrid FRSCC – are considered in the test program. The properties include compressive and splitting tensile strengths, moduli of elasticity and rupture, compressive stress–strain curve, and energy dissipated under compression. These properties are tested at 3, 7, 14, 28, 56, and 91 days. Relationships are established to predict the compressive and splitting tensile strengths, moduli of elasticity and rupture, compressive stress–strain curve, and energy dissipated under compression. The models provide predictions matching the measurements.