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Experimental Investigation on Structural Fibrous Concrete with Polyolefin - Steel Hybrid Fibres

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This paper presents the experimental results on the hybrid fibre reinforced concrete (HFRC) with hybrid fibres. A total of 30 concrete specimens were tested to study the effect of hybrid fibre reinforcement on the flexural performance of fibre reinforced concrete. The fibre content dosage Vf ranged from 0.0 to 2.0%. Steel and Polyolefin fibres were combined in different proportions and their impact on strength and ductility studied. Addition of 2.0% by volume of hybrid fibres increases the above study parameters appreciably, when compared to the plain concrete. Empirical expressions for predicting the strength property of hybrid fibre reinforced concrete (HFRC) is proposed based on regression analysis.
Keywords: Compressive strength; Ductility; Hybrid fibre reinforced concrete; Modulus of rupture; Polyolefin fibre; Steel fibre.
Concrete is a relatively brittle material, addition of fibres to concrete makes it more homogeneous and isotropic and transforms it from a brittle to a more ductile material1-3. The basic purpose of using hybrid fibres is to control cracks at different size levels, in different zones of concrete (cement paste or interface zone between paste and aggregate) and at different loading stages. The large and strong fibres control large cracks. The small and soft fibres control crack initiation and propagation of small cracks4-6. This research work focuses on the polyolefin-steel hybrid fibres reinforced system. It has been shown recently that the hybrid composite can offer more attractive engineering properties because the presence of one fibre enables more efficient utilization of the potential properties of the other fibre7.. However, the hybrid composites studied by previous researchers were focused on cement paste or mortar. Information available pertaining to the strength and ductility properties of hybrid fibre reinforced concrete is found to be limited. Hence an attempt has been made to study the strength and ductility properties of hybrid fibre reinforced concrete. A total of 30 specimens were cast and tested to determine the impact of hybrid fibres on the strength and ductility of fibre reinforced concrete (FRC).


  1. ACI Committee 544,” Measurement of Properties of Fibre Reinforced Concrete”, (ACI 544.2R-889), American Concrete Institute, Detroit, Michigan, USA.1989.
  2. R. Hameed, A. Turatsinze, F. Duprat, and A. Sellier, “Study on the Flexural Properties of Metallic-Hybrid Fibre Reinforced Concrete”, Maejo International Journal of Science and Technology, 2010, 4 (02), pp.169-184.
  3. A.E.,Naaman, “Fibre Reinforcement for Concretes, Concrete International: Design and Construction”, 1985,7(3), pp.21-25.
  4. V.Ramakrishnan, “Construction of Highway Structures with synthetic Structural Fibre Reinforced Concrete, ICFRC”, Proceedings of the High Performance Concrete Composites, 1987, India1-17.
  5. N.Banthia, and N. Nandakuma,”Crack Growth Resistance of Hybrid Fibre Reinforced Cement Composites”, Cement and Concrete Composites, 2003, 25, pp. 3-9.
  6. P.S. Surendra “Strength Evaluation and Failure Mechanisms of Fibre Reinforced Concrete”, Proceedings of the International Symposium on Fibre Reinforced Concrete, India, 1987, pp. 1-18.
  7. Wu Yao, Jie Li, and Kern Wu, “Mechanical Properties of Hybrid Fibre-Reinforced Concrete at Low Fibre Volume Fraction”, Cement and Concrete Research, 2002,33, pp.27-30.
  8. IS 1489: 1991, Specification for Portland Pozzolana Cement (PPC), BIS, and New Delhi.
  9. IS 383: 1970, Specification for coarse and fine aggregates from natural sources for concrete, BIS, New Delhi.
  10. IS 516 (1959). Method of test for strength of concrete, BIS, New Delhi.
  11. IS: 456 (2000). Plain and Reinforced concrete – Code of Practice, BIS, New Delhi.
  12. Zhiguo You, Xiangyu Chen, and Shuai Dong, “Ductility and Strength of Hybrid Fibre Reinforced Self-Consolidating Concrete Beam with Low Reinforcement Ratios”. Elsevier, Systems Engineering Procedia 1,2011, pp.28-34.
  13. S.K. Kaushik, V. Kumar, and V.P. Bhargava, . “Mechanical Properties of High-Strength Concrete”: A Review, The Indian Concrete Journal, 2001, pp. 515-521.
  14. F.Faisal, and A.A. Samir, “Mechanical Properties of High-Strength Fibre Reinforced Concrete”, 89(5), ACI Materials Journal,1992, pp.449-455.