Reinforced Concrete Beam with Light Weight blocks and Steel Fibre added below Neutral Axis
P. S. Aravind Raj1, F. S. Frieda2, S. P. Sangeetha3, R. Divahar4
1Dr.P.S.Aravind Raj*, Department of Civil Engineering, Aarupadai Veedu Institute of Technology, Paiyanoor, India.
2F. S. Frieda, Department of Civil Engineering, KCG College of Technology, Karapakkam, Chennai-97, India.
3Dr.S.P.Sangeetha, Department of Civil Engineering, Aarupadai Veedu Institute of Technology, Paiyanoor, India.
4Dr.R.Divahar, Department of Civil Engineering, Aarupadai Veedu Institute of Technology, Paiyanoor, India.
Manuscript received on November 14, 2019. | Revised Manuscript received on 23 November, 2019. | Manuscript published on December 10, 2019. | PP: 4214-4218 | Volume-9 Issue-2, December 2019. | Retrieval Number: B7128129219/2019©BEIESP | DOI: 10.35940/ijitee.B7128.129219
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC-BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: The reinforced concrete is one of the widely used structural materials which have its own major advantages and disadvantages. Its behaviour when provided in various positions in the structural elements like compression, tension, and shear zones has significant impact. Since the concrete is excellent in the compression behaviour, and only a nominal performer in the tension behaviour, steel reinforcement are provided in required zones where tension occurs. Thus in a bending member, below the neutral axis, that is at the tension zone, the concrete acts only as a interface medium between reinforcement that carrying the tension and the concrete above neutral axis carrying compression forces. This concrete is also called as sacrificial concrete. Thus in order to efficiently use the concrete falls under the tension zone, the concrete can be swapped with any suitable lighter or cheaper material or the concrete may be strengthened to carry tensile stresses. In this present study, the concrete below neutral axis is replaced with lightweight ‘aerocon’ block cubes of 8 cu.cm and 64 cu.cm by 20% of volume of concrete and in another specimen, steel fibres are added in the concrete that are below neutral axis by 2% and 3% by weight to improve the local tensile strength of concrete as material The results obtained shows that the aerocon cubes replaced specimens has equivalent performance of the control specimen and the steel fibre added specimen had superior deflection and crack performance than the control specimen.
Keywords: Sacrificial Concrete, Aerocon blocks, Hooked steel fibre, neutral axis.
Scope of the Article: Concrete Structures