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Effect of hybrid fibres on the shear and durability behaviour of high performance concrete

Effect of hybrid fibres on the shear and durability behaviour of high performance concrete An attempt has been made to investigate the effect of hybrid fibres on the shear strength and behaviour of high performance concrete (HPC). A total of 24 reinforced concrete beams of size 100 × 150 × 1,200 mm were cast and tested under two-point loading. No shear reinforcement was provided in the shear span to ensure shear failure. The main variables considered were the volume fraction of: 1) crimped steel fibres viz. 0.5% and 1.0%; 2) polypropylene fibres viz. 0.1%, 0.15% and 0.2%. Test results indicate that addition of fibres in hybrid form significantly improves the first crack load (about 48%) and ultimate shear strength (about 37%). Prior to the beam testing, the basic mechanical properties and durability characteristics of hybrid fibre reinforced high performance concrete (HFRHPC) were also evaluated. The material test results showed that the HFRHPC has excellent performance in terms of mechanical and durability properties. Keywords: ductility; durability; fibre reinforced concrete; FRC; high performance concrete; mechanical properties; polypropylene fibres; steel fibres; shear strength. Reference to this paper should be made as follows: Ganesan, N., Indira, P.V. and Sabeena, M.V. (2015) ` of high performance concrete', Int. J. Structural Engineering, Vol. 6, No. 1, pp.44­55. Biographical http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png International Journal of Structural Engineering Inderscience Publishers

Effect of hybrid fibres on the shear and durability behaviour of high performance concrete

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Publisher
Inderscience Publishers
Copyright
Copyright © Inderscience Publishers
ISSN
1758-7328
eISSN
1758-7336
DOI
10.1504/IJSTRUCTE.2015.067988
Publisher site
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Abstract

An attempt has been made to investigate the effect of hybrid fibres on the shear strength and behaviour of high performance concrete (HPC). A total of 24 reinforced concrete beams of size 100 × 150 × 1,200 mm were cast and tested under two-point loading. No shear reinforcement was provided in the shear span to ensure shear failure. The main variables considered were the volume fraction of: 1) crimped steel fibres viz. 0.5% and 1.0%; 2) polypropylene fibres viz. 0.1%, 0.15% and 0.2%. Test results indicate that addition of fibres in hybrid form significantly improves the first crack load (about 48%) and ultimate shear strength (about 37%). Prior to the beam testing, the basic mechanical properties and durability characteristics of hybrid fibre reinforced high performance concrete (HFRHPC) were also evaluated. The material test results showed that the HFRHPC has excellent performance in terms of mechanical and durability properties. Keywords: ductility; durability; fibre reinforced concrete; FRC; high performance concrete; mechanical properties; polypropylene fibres; steel fibres; shear strength. Reference to this paper should be made as follows: Ganesan, N., Indira, P.V. and Sabeena, M.V. (2015) ` of high performance concrete', Int. J. Structural Engineering, Vol. 6, No. 1, pp.44­55. Biographical

Journal

International Journal of Structural Engineering – Inderscience Publishers

Published: Jan 1, 2015

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