An Experimental Investigation on Structural Performance of Steel Fibre Reinforced Concrete Beam
Jyoti Narwal1, Ajay Goel2, Devender Sharma3, D.R. Kapoor4, Bhupinder Singh5
1Jyoti Narwal, Student of M-Tech (Structural Engineering) in Indo Global College of Engineering, Mohali, India.
2Ajay Goel, Student of M-Tech (Structural Engineering) in Indo Global College of Engineering, Mohali, India.
3Devender Sharma, Assistant Professor in Indo Global College of Engineering, Mohali, India.
4D. R. Kapoor, Assistant Professor in Indo Global College of Engineering, Mohali, India.
5Bhupinder Singh, Assistant Professor in Indo Global College of Engineering, Mohali, India.
Manuscript received on July 12, 2013. | Revised Manuscript received on August 13, 2013. | Manuscript published on August 30, 2013. | PP: 301-304 | Volume-2, Issue-6, August 2013. | Retrieval Number: F2063082613/2013©BEIESP
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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: Conventional concrete loses its tensile resistance after the formation of multiple cracks. However, fibreous concrete can sustain a portion of its resistance following cracking to resist more loading. The Steel Fibre Reinforced Concrete (SFRC) has enhanced resistance against cracking and a better micro-crack arrest mechanism. Further, fibre reinforced concrete is found to have improved strengths against shear, flexure, tension and increased resistances against impact, fatigue, wear and enhanced toughness and ductility over that of RCC. In the present study an attempt has been made to investigate the effect of percentage of steel fibres on structural behavior of beams measured in terms of Load Deflection behavior, Ultimate load carrying capacity, Cracking Pattern and Mode of Failure and to investigate the effect of aspect ratio of steel fibres on structural performance of RC beams measured in terms of above parameter sand also to investigate the effect of mixed fibres (two types of fibres with different aspect ratios) on structural performance of RC beams. Initially thirteen specimens of series (SV1, SVF1, SVF2 and SVF3) with different aspect ratio of fibres were tested. Finally, thirteen specimens of series (SV1, SVF1, SVF2 and SVF3) with volume fractions of 0.5%, 1.0%, 1.5% and 2% steel fibres were cast and tested. The results obtained from the investigation indicated that addition of steel fibres in the concrete mix improved structural performance of beam measured in terms of ultimate load carrying capacity, stiffness, crack width, deflection. The presence of steel fibres in concrete mix also improved the post cracking behavior of the specimens of all the series due to crack arresting phenomenon. With the increase in the percentage of fibres from 0.05% to2% in the beam the deflection at peak load increased. The optimum fibre volume percentage for all the series was obtained as 1.5%. The structural performance of the specimens of the series SVF2 was best among all the series. It was also observed in the study that addition of fibres results in improvement in ultimate load carrying capacity of beams along with its area under the curve thus indicating improved toughness of the beams.
Keywords: RCC, SFRC, SVF2, SVF3.