Effect of Steel and Polypropylene Fibre on the Tension Stiffening of Ultra High Performance Concrete
Lijina Thomas1, J. S. Jithin2
1Lijina Thomas, PG Research Scholor, Department of Structural Engineering, Civil Engineering, Mar Baselios College of Engineering and Technology, Thiruvanathapuram (Kerala), India.
2Jithin J.S, Assistant Professor, Department of Civil Engineering, Mar Baselios College of Engineering and Technology, Thiruvanathapuram (Kerala), India.
Manuscript received on 05 December 2018 | Revised Manuscript received on 19 December 2018 | Manuscript published on 30 December 2018 | PP: 44-47 | Volume-8 Issue-2C, December 2018 | Retrieval Number: 100.1/ijeat.ICID-2018_EE_108
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Abstract: Tension stiffening is one of the important properties of concrete that reduces the strain in steel and leads to reduction in width and spacing of cracks in reinforced flexural members. The tensile strength of concrete between cracks in a reinforced concrete member represents the tension stiffening effect. Several attempts have been made in the past to improve the tension stiffening effect of conventional concrete by adding short discrete fibre in the matrix, but a few studies have been conducted to find out the tension stiffening effect of steel fibre and polypropylene fibre on the cracking behaviour of ultra high performance concrete. So this study investigates the effect of metallic fibre (crimped steel) and non metallic fibre (polypropylene fibre) on tension stiffening characteristics and the cracking behaviour of ultra high performance concrete. The variables included in this study are volume fractions of crimped steel fibre (0.25, 0.5%, 0.75% and 1%) and polypropylene fibre (0.1, 0.15 and 0.2) The optimum content of steel fibre and polypropylene fibre and their effect on the tension stiffening and cracking behaviour is finding out by studying the load deformation behaviour, crack width, crack spacing and crack pattern of the prismatic tension specimen subjected to uniaxial tension.
Keywords: Load Deformation Behaviour, Tension Stiffening Bond Factor And Ultra High Performance Concrete.
Scope of the Article: Concrete Engineering