Flexural behavior of Reinforced Fly Ash Concrete in Comparison to Reinforced Normal Concrete beams in Terms of Moment-Curvature Relation
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 10, 2014. | Revised Manuscript received on November 29, 2014. | Manuscript published on December 30, 2014. | PP: 52-54  | Volume-4 Issue-2, December 2014. | Retrieval Number:  E3180063514/2013©BEIESP

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Abstract: The plastic behavior of any structural member is limited by the amount of deformation that occurs at a critical section when it is subjected to applied loads. Curvatures are obtained by dividing the sum of extreme fiber strains by the corresponding effective depth. Study of curvature assists in evolving the rotation capacities of the beam and also helps in assessing the capacity of the structure to redistribute the moment after yielding. In this paper moment curvature variation of RFAC beams considered are compared with RNC beams for each grade of concrete. Comparison of RFAC beams (with 20%, 35% and 50% replacement of cement by Fly ash) with RNC beams designed as balanced section cured for 28 days. From the study of the moment curvature relations of all three grades of concrete, it is observed that the trend of moment curvature relation of RFAC beams is similar to that of RNC beams at any load level, the curvature of the RFAC beams are lesser than RNC beam. It is also observed that as the CRLs by Fly ash increases, the curvature in RFAC beams decrease in M30 and M40 concretes and are all almost same in M50 concrete.
Keywords:  Fly ash, cement replacement material, concrete beams, flexural behaviour of reinforced Fly ash concrete, movement curvature relation.