Flexural behavior of Reinforced Fly Ash Concrete in Comparison to Reinforced Normal Concrete Beams in Terms of Ductility Index
B.K. Narendra1, T.M.Mahadeviah2
1Dr.B.K. Narendra, Principal, BGS Institute of Technology, B G Nagar, Karnataka, India.
2Dr. T.M. Mahadeviah, Department of Civil Engineering, BGS Institute of Technology, B G Nagar, Karnataka, India.
Manuscript received on November 12, 2014. | Revised Manuscript received on November 30, 2014. | Manuscript published on December 30, 2014. | PP: 41-44 | Volume-4 Issue-2, December 2014. | Retrieval Number: E3178063514/2013©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: Ductility is a measure of the ability of a material section, structural element or structural system to sustain inelastic deformation prior to collapse, without significant loss in resistance. The ductility index describes the inelastic deformation capacity of the structural member. The ductility index in case of flexural members like beam is generally defined in terms of deflection ductility, since it can be measured in test more easily. The ductility indices of RFAC beams with 20%, 35% and 50% CRLs are 0.86, 0.75 and 0.63 times the ductility index of RNC beam respectively. There is considerable difference in the ductility indices between the different CRLs considered and the values range between 1.68 to 2.30.The cracking behaviour observed for RFAC beams clearly shows that performance of RFAC beams is satisfactory when compared to RNC beams with respect to crack widths. In design, the theory applied for strength prediction of RNC beams is equally valid for RFAC beams. The experimental investigation clearly demonstrates that the there was no major difference in the strength, deformations and structural performances between the RFAC beams with different CRLs and RNC beams.
Keywords: Fly ash, Cement replacement material, Concrete beams, flexural behaviour of reinforced Fly ash concrete, ductility index.