Comparison of Mechanical Properties of Lightweight and Normal Weight Concretes Reinforced with Steel Fibers
Compared to conventional concrete, lightweight concrete is more brittle in nature however, in many situations its application is advantageous due to its lower weight. The associated brittleness issue can be, to some extent, addressed by incorporation of discrete fibers. It is now established that fibers modify some fresh and hardened concrete properties. However, evaluation of those properties for lightweight fiber-reinforced concrete (LWFC) against conventional/normal weight concrete of similar strength class has not been done before. Current study not only discusses the change in these properties for lightweight concrete after the addition of steel fibers, but also presents a comparison of these properties with conventional concrete with and without fibers. Both the lightweight and conventional concrete were reinforced with similar types and quantity of fibers. Hooked end steel fibers were added in the quantities of 0, 20, 40 and 60kg/m3. For similar compressive strength class, results indicate that compared to normal weight fiber-reinforced concrete (NWFC), lightweight fiber-reinforced concrete (LWFC) has better fresh concrete properties, but performs poorly when tested for hardened concrete properties.
Keywords:lightweight, steel fibers, density, elastic modulus, ductility
ACI Committee 213, “Guide for Structural Lightweight-Aggregate Concrete (ACI 213R-03)”, in: ACI Manual of Concrete Practice, American Concrete Institute, 2013
A. Kumar R., P. Prakash, “Studies on Structural Light Weight Concrete by Blending Light Weight Aggregates”, International Journal of Innovative Research in Engineering & Management, Vol. 2, No. 4, pp. 48–52, 2015
C. Shi, Y. Wu, M. Riefler, “Properties of Fiber-Reinforced Lightweight Concrete”, Special Publication, Vol. 226, pp. 123-134, 2005
K. Holschemacher, A. Ali, S. Iqbal, “Bond of reinforcement in lightweight concrete”, in: Zingoni (ed), Insights and Innovations in Structural Engineering, Mechanics and Computation, Taylor & Francis Group: London, pp. 1284-1287, 2016 DOI: https://doi.org/10.1201/9781315641645-210
S. Iqbal, A. Ali, K. Holschemacher, T. A. Bier, “Mechanical properties of steel fiber reinforced high strength lightweight self-compacting concrete (SHLSCC)”, Construction and Building Materials, Vol. 98, pp. 325–333, 2015 DOI: https://doi.org/10.1016/j.conbuildmat.2015.08.112
A. A. Shah, Y. Ribakov, “Recent trends in steel fibered high-strength concrete”, Materials & Design, Vol. 32, No. 8–9, pp. 4122–4151, 2011 DOI: https://doi.org/10.1016/j.matdes.2011.03.030
M. Hassanpour, P. Shafigh, H. Bin Mahmud, “Lightweight aggregate concrete fiber reinforcement – A review”, Construction and Building Materials, Vol. 37, pp. 452–461, 2012 DOI: https://doi.org/10.1016/j.conbuildmat.2012.07.071
German Committee for Structural Cocnrete, Commentary on the DAfStb Guideline “Steel Fibre Reinforced Concrete”, Vol. 614, Beuth GmbH, 2015
Fib, fib Model Code 2010 - First complete draft, Vol. 1, No. March, 2010
ACI Comitee 544, “Design Considerations for Steel Fiber Reinforced (ACI 544.4R-88)”, in: ACI Manual of Concrete Practice, American Concrete Institute, 2013
ACI Subcommittee C09.20, “Standard Test Method for Density, Relative Density ( Specific Gravity ), and Absorption (ASTM C 128-15)”, in: ASTM Volume 04.02 Concrete and Aggregates,ASTM International, 2015
ASTM International, “ASTM C138 / C138M-14Standard Test Method for Density ( Unit Weight ), Yield , and Air Content ( Gravimetric )”, ASTM International, 2014
DIN EN, “12350-5Testing fresh concrete - Part 5: Flow table test”, German version (EN), Deutshes Institut für Normung, 2009
R. V. Balendran, F. P. Zhou, A. Nadeem, A. Y. T. Leung, “Influence of steel fibres on strength and ductility of normal and lightweight high strength concrete”, Building and Environment Vol. 37, No. 12, pp. 1361–1367, 2002 DOI: https://doi.org/10.1016/S0360-1323(01)00109-3
P. S. Song, S. Hwang, “Mechanical properties of high-strength steel fiber-reinforced concrete”, Construction and Building Materials, Vol. 18, No. 9, pp. 669–673, 2004 DOI: https://doi.org/10.1016/j.conbuildmat.2004.04.027
S. Yazici, G. Inan, V. Tabak, “Effect of aspect ratio and volume fraction of steel fiber on the mechanical properties of SFRC”, Construction and Building Materials, Vol. 21, No. 6, pp. 1250–1253, 2007 DOI: https://doi.org/10.1016/j.conbuildmat.2006.05.025
M. A. Mansur, M. S. Chin, T. H. Wee, “Stress-Strain Relationship of High-Strength Fiber Concrete in Compression”, Journal of Materials in Civil Engineering, Vol. 11, No. 1, pp. 21–29, 1999 DOI: https://doi.org/10.1061/(ASCE)0899-1561(1999)11:1(21)
R. Neves, J. De Almeida, “Compressive behaviour of steel fibre reinforced concrete”, Structural Concrete, Vol. 6, No. 1, pp. 1–8, 2005 DOI: https://doi.org/10.1680/stco.2005.6.1.1
S. P. Shah, “Do Fibers Increase the Tensile Strength of Cement-Based Matrix?”, Materials Journal, Vol. 88, No. 6, pp. 595–602, 1992 DOI: https://doi.org/10.14359/1195
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