X-Ray Fluorescence, Strength Testing and 3D-Analysis of Steel Fibre Reinforced Concrete Specimen

Abstract

This experimental study investigatedsteel fiber reinforced concrete (SFRC) specimen’s performance by using to X-Ray Fluorescence (XRF) test, Flexural Strength test, Compressive Strength test and Rebound Hammer test. The experimental result of the compressive strength test was further analyzed by 3D Analysis using Stat-Ease Design-Expert V13 to correlate the compressive strengths to the elemental composition of the concrete structure. The result showed that the amount of Calcium Oxide (CaO) in the sample was lower than the composition of Ordinary Portland Cement (OPC) used. Thirty-six (36) beam samples of 100mm x 100mm x 500mm size and twelve (12) cube samples of 100mm x 100mm x 100m size were prepared with different percentages of steel fiber (0.5%, 1.0% and 1.5%) to determine the optimum dosage. All samples were tested at 7, 14 and 28 days. It can be concluded that the analysis shows a low significant effect at an early aged concrete but showing a slightly increased in compression and flexural strength at a later age. The results also showed that the addition of steel fibercauses the reduction of slump value (workability). Recommended optimum percentage range of steel fiber addition in concrete is proposed. The relation among rebound hammer number, compressive strength and flexural strength of the specimens was also discussed.