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Similarities and Differences of Pumping Conventional and Self-Compacting Concrete

  • Dimitri Feys
  • Geert De Schutter
  • Ronny Verhoeven
  • Kamal H. Khayat
Conference paper
Part of the RILEM Bookseries book series (RILEM, volume 1)

Abstract

In practice, self-compacting concrete (SCC) is considered as a simple extension of conventional vibrated concrete (CVC) when pumping is concerned. The same equipment, materials, pumping procedures and guidelines used for CVC are applied when pumping SCC. On the other hand, it has been clearly shown that the rheological properties and the mix design of SCC are different than CVC. Can the same pumping principles employed for CVC be applied for SCC? This paper compares the some published results of pumping of CVC with those for SCC. A first striking difference between pumping of CVC and SCC is the flow behaviour in the pipes. The flow of CVC is a plug, surrounded by a lubricating layer, while during the flow of SCC, part of the concrete volume itself is sheared inside the pipe. As a result, the importance of viscosity increases in case of SCC. Due to the low yield stress of SCC, the behaviour in bends is different, but quite complex to study. Due to the lower content of aggregate and better stability of SCC, as it is less prone to internal water migration, blocking is estimated to occur at lower frequency in case of SCC.

Keywords

Wall Shear Stress Pressure Loss Coarse Aggregate Fresh Concrete Plastic Viscosity 
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.
    Kaplan, D. (2001), Pumping of concretes, Ph.D. Dissertation (in French), Laboratoire Central des Ponts et Chausées, Paris.Google Scholar
  2. 2.
    Chapdelaine, F. (2007), Fundamental and practical study on the pumping of concrete, Ph-D-thesis (in French), Université Laval, Laval.Google Scholar
  3. 3.
    Guptill, N.R. et al. (ACI-Comm 304) (1998), Placing concrete by pumping methods, American Concrete Institute, Farmington Hills.Google Scholar
  4. 4.
    Crepas, R.A. (1997), Pumping Concrete, Techniques and Applications, 3rd edition, Crepas and Associates, Inc., Elmhurst.Google Scholar
  5. 5.
    Beitzel, H. and Beitzel. M. (2008), Pump application for self-compacting concrete under extreme conditions, Proc. of the 3rd North-American Conf. on the Design and Use of Self-Consolidating Concrete, Chicago.Google Scholar
  6. 6.
    Ouchi, M. and Sakue, J. (2008), Self-compactability of fresh concrete in terms of dispersion and coagulation of particles of cement subject to pumping, Proc. of the 3rd North-American Conf. on the Design and Use of Self-Consolidating Concrete, Chicago.Google Scholar
  7. 7.
    Feys, D. (2009), Interactions between rheological properties and pumping of self-compacting concrete, Ph.D. Thesis, Ghent University, Ghent.Google Scholar
  8. 8.
    De Schutter, G., Bartos, P., Domone, P. and Gibbs, J. (2008), Self-Compacting Concrete, Whittles Publishing, Caithness.Google Scholar
  9. 9.
    Tattersall, G.H. and Banfill, P.F.G. (1983), The Rheology of Fresh Concrete, Pitman, London.Google Scholar
  10. 10.
    Wallevik, O.H. (2003), Rheology – A scientific approach to develop self-compacting concrete, Proc. of the 3rd Int. Symp. on Self-Compacting Concrete, Reykjavik, pp. 23–31.Google Scholar
  11. 11.
    Wallevik, J.E. (2009), Rheological properties of cement paste: Thixotropic behavior and structural breakdown, Cem. Conc. Res., vol. 39, pp. 14–29.CrossRefGoogle Scholar
  12. 12.
    Ede, A.N. (1957), The resistance of concrete pumped through pipelines, Mag. Conc. Res., vol. 9, pp. 129–140.Google Scholar
  13. 13.
    Browne, R.D. and Bamforth, P.B. (1977), Tests to establish concrete pumpability, ACI Journal, vol. 74, pp. 193–203.Google Scholar

Copyright information

© RILEM 2010

Authors and Affiliations

  • Dimitri Feys
    • 1
  • Geert De Schutter
    • 2
  • Ronny Verhoeven
    • 3
  • Kamal H. Khayat
    • 1
  1. 1.Department of Civil EngineeringUniversité de SherbrookeQuébecCanada
  2. 2.Magnel Laboratory for Concrete Research, Department of Structural Engineering, Faculty of EngineeringGhent UniversityGhentBelgium
  3. 3.Hydraulics Laboratory, Department of Civil Engineering, Faculty of EngineeringGhent UniversityGhentBelgium

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