This study investigates the use of steel fibers and hybrid composite with a total fibers content of 2% on the high strength flowing concrete and determines the density, compressive strength, static modulus of elasticity, flexural strength and toughness indices for the mixes. The results show that the inclusion of more than 0.5% of palm fibers in hybrid fibers mixes reduces the compressive strength. The hybrid fibers can be considered as a promising concept and the replacement of a portion of steel fibers with palm fibers can significantly reduce the density, enhance the flexural strength and toughness. The results also indicates that the use of hybrid fibers (1.5 steel fibers + 0.5% palm fibers) in specimens increases significantly the toughness indices and thus the use of hybrid fibers combinations in reinforced concrete would enhance their flexural toughness & rigidity and enhance their overall performances
If the inline PDF is not rendering correctly, you can download the PDF file here.
1. F. Burak S. Turkel & Y. Altuntas Hybird fibers reinforced self-compacting concrete with high-volume coarse fly ash Const. & Build. Mater. 21 150-156 2007.
2. F. Burak S. Turkel & Y. Altuntas Effects of steel fibers reinforcement on surface wear resistance on self compacting repair mortar Cem. & Conc. Comp. 29 391-396 2007.
3. L. Gang K. Wang & T.J. Rudolphi Modeling reheological behavior of highly flowable mortar using concepts of particle and fluid mechanics Cem. & Conc. Comp. 30 1-12 2008.
4. H. Okamura & M. Ouchi Self compacting concrete J. Adv.Concr Technol 1(1) 1-15 2003.
5. K.H. Khayat R. Morin Performance of self-consolidating concrete used to Repair parapet wall in Montreal Proceedings of the first north American conference on the design and use of self-consolidating concrete 475-481 2002.
6. M. Sahmaran A. Yurtseven & O.I. Yaman Workability of hybrid fibers reinforced self-compacting concrete. Building & Environment Journal 40 1672-77 2005.
7. W. Sun H. Chen X. Luo & H. Qian The effect of hybrid fibers and expansive agent on the shrinkage and permeability of high-performance concrete Cem. & Conc. Research 31 595-01 2001.
8. A. Bentur & S. Mindess Fibers Reinforced Cementitious Composites 2nd ed. 2007 Taylor & Francis.
9. W. Yao J. Lie & K. Wu Mechanical properties of hybrid fibers- reinforced concrete at low volume fibers fraction Cem. & Conc.e Research; 33 27-30 2003.
10. The American Concrete Institute (ACI 211.1-91) Standard P ”Standard Practice for selecting Proportions for NormalHeavyweight and Mass Concrete ” ACI Manual of Concrete Practice 2000 Part 1: Materials and General Properties of Concrete.
11. S. Mustafa & O.I. Yaman Hybrid fibers reinforced self compacting concrete with a high volume coarse fly ash Construction & Building Materials 21 150-156 2007.
12. G. Steffen & C.W. Joost Parameter study on the influence of steel fibers and coarse aggregate content on the fresh properties of self compacting concrete Cement & Concrete Research 31 1793-1798 2001.
13. B. Chen & J. Liu Residual strength of hybrid-fibers-reinforced high-strength concrete after exposure to high temperatures Cement & Concrete Research 34 1065-69 2004.
14. I. Markovic J.C. Walraven & M.J. Van Self compacting hybrid fibers concrete-mix design workability and mechanical properties Proceedings of third international symposium on self-compacting concrete 763-775 2003.
15. P.K. Mehta & P.J.M. Monterio Concrete structures properties and materials 2nd ed. New Jersey USA: Prentice-Hall: pp. 447 1993.
16. A. Mor Steel-concrete bond in high strength-lightweight concrete ACI Materials Journal 89(1) 76-82 1992.
17. O. Kayali M.N. Haque & B. Zhu Some characteristics of high strength fibers reinforced lightweight aggregate concrete Cement & Concrete Composites 25 207-13 2003.
18. D.J. Hannant Fibers cement and fibers concrete Chichester 1987 UK :Wiley.
19. A.M. Neville Properties of concrete 1995 Fourth and Final edition.
20. A.C. Aydin Self compactability of high volume hybrid fibers reinforced concrete Const. & Build. Material 21 1149-54 2007.
21. S.K. Al-Oraimi & A.C. Seibi Mechanical characterization and impact behavior of concrete reinforced with natural fibers Composite structure 32 165-171 1995.
22. P.N. Balaguru & S.P. Shah Fibers Reinforced Cement Composites McGraw-Hill Inc. 1992 New York.
23. N. Banthia & M. Sappakittipakorn Toughness enhancement in steel fibers reinforced concrete through fibers hybridization Cem. & Conc. Research 37 1366-72 2007.
24. M.C. Nataraja N. Dhang & A.P. Gupta Stress-strain curves for steel fibers reinforced concrete under compression Cem. & Conc. Comp. 21 383-390 1999.
25. R.F. Toledo K. Ghavami G.L. England & K. Scrivener Development of vegetable fibre-mortar composites of improved durability Cem. & Conc. Research 25 185-96 2003.
26. D. Feldman & Z. Zheng Synthetic fibers for fibers concrete composites [in:] Ronald K. Eby et al. (Eds.) High Performance Polymers and Polymer Matrix Composites: Symposium Held April 13-16 1993 San Francisco California U.S.A. Material Research Society Symposia Proceedings vol. 305 Materials Research Society Pittsburgh 123-128 1993.
27. A. Sivakumar & M. Santhanam Mechanical properties of high strength concrete reinforced with metallic and non-metallic fibers Cem. & Conc. Comp. 29 603-08 2007.
28. American Society Tests of Material ASTM C 143 C469 & C1018 Annual book of ASTM Standard Volume 04.02”ASTM international. www.astm.org.
29. BSI British Standard” methods for determination of density of hardened concrete” 1983 BS 1881: Part 114 British Standard.
30. BSI British Standard” methods for determination of compressive strength of concrete cubes” 1983 BS 1881: Part 116 British Standard.
31. BSI British Standard” methods for determination of flexural strength” 1983 BS 1881: Part 118 British Standard.