Flexural behavior of ultra high-performance concrete using local raw materials

Abstract

Ultra high-performance concrete (UHPC) is a special concrete with superior properties as compared with traditional concrete. Therefore, this study focused on evaluating structural behavior of UHPC beam subjected to bending test to provide experimental data regarding structural behaviors of UHPC. Local raw materials used to produce UHPC included Portland cement, silica fume, quartz powder, quartz sand, superplasticizer, water, and steel fiber at a level of 3% by volume of concrete. The studied parameters to assess flexural behavior of UHPC beam subjected to bending test consisted of maximum load, toughness, and first-crack deflection. Experimental results obtained the UHPC had a compressive strength of 120.6 MPa, Young’s modulus of 55.7 GPa, and poisson’s ratio of 0.21. The use of 3% steel fiber improved flexural strength (19.81 MPa) and toughness indexes with I₅ = 5.29, I₁₀ = 11.25, I₂₀ = 24.40, and I₃₀ = 36.97.