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Flow-Induced Fiber Orientation in SCSFRC: Monitoring and Prediction

  • Liberato Ferrara
  • Nathan Tregger
  • Surendra P. Shah
Conference paper
Part of the RILEM Bookseries book series (RILEM, volume 1)

Abstract

The dispersion and the orientation of fibers in concrete can be governed through a suitably balanced set of fresh state properties and a carefully designed casting procedure, if proved effective. This would allow one to achieve a mechanical performance of the fiber-reinforced cementitious composite which is optimal to the foreseen structural application, even keeping the fiber content at relatively low values (e.g. maximum 1% by volume) and aligning them with the direction of the principal tensile stress within the structural element when in service. Modeling the casting of fresh concrete, through suitable numerical tools, in order to anticipate the direction of flow lines, along which fibers may orient, and optimize the whole process to the foreseen structural application is of the foremost importance. Monitoring fiber dispersion related issues through suitable non destructive methods would also be crucial for reliable, time and cost-effective quality control. In this paper a pioneer study has been performed in the above said framework. The results are really encouraging and pave the way towards a holistic approach to the design of self-consolidating fiber-reinforced concrete structures.

Keywords

Fiber Orientation Steel Fiber Computational Fluid Dynamics Modeling Fresh Concrete Fiber Dispersion 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. [1]
    Stroeven, P. (2009), ACI Mat. J., vol. 106, n. 3, pp. 213–222.Google Scholar
  2. [2]
    Ferrara, L. and Meda, A. (2006), Mat. & Struct., vol. 39, n. 4, pp. 411–420.CrossRefGoogle Scholar
  3. [3]
    Soroushian, P. and Lee, C.D. (1990), ACI Mat. J., vol. 87, n. 5, pp. 433–439.Google Scholar
  4. [4]
    Soroushian, P. and Lee, C.D. (1990), ACI Mat. J., Vol. 87, n. 6, pp. 541–546.Google Scholar
  5. [5]
    Stähli, P., Custer, R. and van Mier, J.G.M., (2008), Mat. & Struct., vol. 41, n. 1, pp. 1891–196.Google Scholar
  6. [6]
    Ferrara, L., Park, Y.D and, Shah, S.P. (2008), ASCE J. Mat. Civ. Engrg, vol. 20, n. 7, pp. 493–501.CrossRefGoogle Scholar
  7. [7]
    Ferrara, L., Ozyurt, N. and di Prisco, M. (2010), Mat. & Struct., accepted.Google Scholar
  8. [8]
    Ozyurt, N., Woo, L.Y., Mason, T.O. and Shah, S.P. (2006), ACI Mat. J, vol. 103 n. 5, pp. 340–347.Google Scholar
  9. [9]
    Lataste, J.F., Mouloud, B. and Breysse, D. (2008), NDT&E In.t, vol. 41, n. 8, pp. 638–647.CrossRefGoogle Scholar
  10. [10]
    Faifer, M. et al. (2009), In: Proceedings IMTC09, pp. 313–318.Google Scholar
  11. [11]
    Ozyurt, N., Mason, T.O. and Shah, S.P. (2006), Cem. Concr. Res., vol. 36, pp. 1653–1660.CrossRefGoogle Scholar
  12. [12]
    Roussel, N. et al. (2007), Cem. Concr. Res., vol. 37, n. 9, pp. 1298–1307.CrossRefGoogle Scholar
  13. [13]
    Petrie, C.S.J. (1999), J. Non-Newt. Fluid Mechs, vol. 87, pp. 369–402.zbMATHCrossRefGoogle Scholar
  14. [14]
    Mason, T.O., Campo, M.A., Hixson, A.D. and Woo, L.Y. (2002), Cem. Concr. Comp., vol. 24, pp. 457–465.CrossRefGoogle Scholar
  15. [15]
    Woo, L.Y. et al. (2005), Cem. Concr. Comp., vol. 27, pp. 627–636.CrossRefGoogle Scholar
  16. [16]
    Douglas, J.F. and Garboczi, E.J. (1995), Adv. Chem. Phys., XCI, Wiley, pp. 2265–2270.Google Scholar
  17. [17]
    Ferrara, L., Park, Y.D. and Shah, S.P. (2007), Cem. Concr. Res., vol. 37, n. 6, pp. 957–971.CrossRefGoogle Scholar
  18. [18]
    Tregger, N., Ferrara, L. and Shah, S.P. (2008), ACI Mat. J., vol. 105, n. 6, pp. 558–566.Google Scholar
  19. [19]
    Roussel, N. and Coussot, P. (2005), J. Rheol., vol. 49, pp. 705–718.CrossRefGoogle Scholar

Copyright information

© RILEM 2010

Authors and Affiliations

  • Liberato Ferrara
    • 1
  • Nathan Tregger
    • 2
  • Surendra P. Shah
    • 2
  1. 1.Department of Structural EngineeringPolitecnico di MilanoPiacenzaItaly
  2. 2.ACBMNorthwestern UniversityEvanstonUSA

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