The mechanical properties of normal and high-strength self compacting concrete containing straight steel fiber

The mechanical properties of steel fiber-reinforced self-compaction concrete (SCC) are investigated in this work by looking at two important parameters: the volume fraction of steel fiber and the water-to-cement ratio. Because SCC preserves viscosity and avoids segregation, it is simple to use in the field during casting. According to their respective mix designs, the water-to-cement ratios utilized were 0.34 and 0.55, which corresponded to high-strength and normal-strength concrete, respectively. Volume fractions of steel fiber were adjusted to 0%, 0.5%, and 1%. Slump flow, L-box, and V-funnel tests were among the EFFNARC-recommended methods used to test SCC qualities. SS8 additive was used in concrete casting at a dosage of 0.6% of the cement weight. The results showed that all specimens met EFFNARC standards, confirming that the tested samples were steel fiber-reinforced SCC. The compressive strength of SCC, obtained from uniaxial compression tests reached an average of 50.3 MPa, 58.8 MPa and 65.2 MPa for concrete with volume of fraction steel fiber (Vf) each in turn 0%, 0.5% and 1%. Furthermore, the average concrete strength of specimen with Vf 0%, 0.5% and 1% resulted 34.9 MPa, 40.6 MPa and 47.6 MPa. An increase in steel fiber volume fraction generally enhanced the compressive strength of steel fiber-reinforced SCC by approximately 10%–20%. The tensile strength of steel fiber-reinforced SCC was found to be around 6%-10% of its compressive strength, indicating that its mechanical properties are comparable to those of conventional non-SCC concrete.