<![CDATA[This study analyzes the effect of steel fiber addition on the workability, compressive strength, and split tensile strength of f’c 30 MPa concrete. Steel fiber contents of 0%, 5%, and 7% by total weight of concrete mix materials (equivalent to 0, ±112.4, and ±157.4 kg/m³, respectively) were investigated. Thirty-six cylindrical specimens (Ø15 cm × 30 cm) were tested at 7 and 28 days per SNI 7656:2012. Steel fiber addition significantly reduced slump values (7.5, 5.0, and 3.0 cm), decreased 28-day compressive strength from 31.97 MPa to 26.79 MPa (5%) and 23.39 MPa (7%), and increased split tensile strength from 2.45 MPa to 4.29 MPa (5%) and 4.20 MPa (7%). One-way ANOVA confirmed significant differences among variations (compressive strength: F = 34.86 > Fₜₐₕₑ = 5.14, α = 0.05; split tensile strength: F = 12.97 > Fₜₐₕₑ = 5.14, α = 0.05). The 5% steel fiber variation proved most effective, delivering the highest tensile strength improvement while maintaining acceptable workability.]]>
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