Influence of Steel Fibers on Flexural Behavior of Rubberized Hybrid Reinforced Concrete Beam in Layered
H. Alasmari1, B.H. Abu Bakar2, H.M. Akil3

1H.Alasmari, Department of Civil Engineering, Universiti, Sains Malaysia, Penang Malaysia.
2B.H. Abu Bakar, Department of Civil Engineering, Universiti, Sains Malaysia, Penang Malaysia.
3H.M. Akil, Department of Civil Engineering, Universiti, Sains Malaysia, Penang Malaysia.
Manuscript received on 07 March 2019 | Revised Manuscript received on 20 March 2019 | Manuscript published on 30 March 2019 | PP: 1108-1115 | Volume-8 Issue-5, March 2019 | Retrieval Number: E3363038519/19©BEIESP
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Abstract: This study investigates the effect of crumb rubber aggregates with and without steel fibers on flexural behavior of hybrid reinforcement concrete beam in layered. Eighteen (18) hybrid reinforced concrete beams in three groups were prepared in this experimental works with ratio of aggregate replacement of 10%, 12.5%, and 15% by volume of sand. Rubberized layer concrete will be cast at top layer of the beam with reinforcement at the bottom. Two types of steel fibers were incorporated to concrete for the bottom layer of beams i.e., micro copper coated steel and hooked-end fibers with an aspect ratio of 60 and 80, respectively. The amount of selected fibers in the rubberized hybrid concrete is 0.5% by its volume. The performance of hybrid rubberized reinforced concrete beams were observed and measured based on its failure patterns, total energy (toughness), and stiffness, and ultimate deflection, modulus of rupture, strain capacity and ductility index. As a result, the hybrid rubberized reinforced concrete beams incorporating copper steel fiber and crumb rubber has shown a promising performance in the majority of characteristics such as, first crack, ultimate deflection, ductility index, the failure pattern (number of cracks), and critical strain from strain gauges and stress-strain cures a while, the rest characteristics (e.g. ultimate load, toughness, stiffness, and modulus of rupture and width of cracking) observed on hybrid beams contain crumb rubber and hookedend fiber. It was noticed that hybrid rubberized concrete beam without steel fiber has shown less performance in their characteristics than the others which indicated that combination with other materials has potential for further enhancement.
Keyword: Rubberized Concrete, Hybrid, Steel Fibre, Layered Beam.
Scope of the Article: Concrete Engineering