Authors : Hazrina Ahmad, M.H. Mohd Hisbany, B. Ezatul Yasmin and M.F. Nurulain Hanida
Abstract: This study presents a part of a research project conducted to develop a Steel Fibre Reinforced Self-Compacting Concrete (SCFRC) precast ribbed slab panel for domestic application. The research project aims to fully utilize the potentials of the flowability of the Self-compacting Concrete (SCC) mix with steel fibres to replace conventional reinforcements. Four square ribbed slab samples with the dimension of 1.2×1.2 m were constructed varying in terms of the flange thickness (100 and 120 mm) and steel fibre provision area (fully and partially reinforced). The volume of steel fibres incorporated in the SCFRC mix was 80 kg/m3, equivalent to 1% volume fraction. The slab samples were subjected to a point load at a centre point load to assess their flexural and post-cracking behaviour. Generally, the analysis of the experimental results displayed that steel fibres incorporation had effectively contribute to the load bearing capacity of the ribbed slab panels. The highest load bearing capacity was achieved by Sample S2-120 with the ultimate load of 158.37 kN, followed by S2-100 (112.32 kN). With regards to the flange thicknesses, results presented shows that higher thickness led to higher load bearing capacity with lesser deflection. However, in terms of the post-cracking behaviour, leads to steeper load-deflection curves causing the samples to experience more severe cracking as well as spalling of the concrete surface. In terms of the steel provision area, ribbed slab samples that were fully reinforced with steel fibres showed better flexural behaviour with higher load bearing capacity as well as lower deflection in comparison to the partially reinforced samples. Visual observation of the samples also showed that the partially reinforced Samples (S3) experienced more severe failure than fully reinforced Samples (S2). Overall, based on the results, it can be concluded that fully steel fibre reinforced samples with higher flange thickness displayed a promising potential to effectively replace conventional reinforcements.
Hazrina Ahmad, M.H. Mohd Hisbany, B. Ezatul Yasmin and M.F. Nurulain Hanida, 2019. Performance Assessment of Steel Fibre Reinforced Self-Compacting Concrete (SCFRC) Panel with Ribbed Profile. Journal of Engineering and Applied Sciences, 14: 6110-6113.