Influence of Water Content on the Tribological Behavior at Concrete/Wall Interface – Role of Cement Grains

S. Bouharoun(1*)

(1) Laboratoire Génie Civil et géo-Environnement (LGCgE), France
(*) Corresponding author


DOI's assignment:
the author of the article can submit here a request for assignment of a DOI number to this resource!
Cost of the service: euros 10,00 (for a DOI)

Abstract


Each concrete component has a very important role on the tribological behavior in the vicinity of wall surface. The objective of this paper is to understand the influence of the paste volume on the mechanisms intervening at the concrete/formwork. Two concrete with 28 and 34% of paste were formulated in order to study the influence of fines content at the concrete/wall interface. Friction tests were carried out using an apparatus which can reproduce the same conditions of jobsites. Then, three types of mixtures fine elements and the aggregates forming the granular skeleton were prepared to study the effect of water content and aggregates on the interface behavior of fresh concrete. The results show that the friction is governed by the cement grains and its water content. Hypotheses were proposed to explain the different mechanisms occurring at the interface.
Copyright © 2018 Praise Worthy Prize - All rights reserved.

Keywords


Cement Grains; Tribology; Friction; Interface; Fresh concrete; Formwork

Full Text:

PDF


References


K. Salhi, B .Mezghiche, "Effects of Sand of Dune and Granulated Slag on the Properties of Cement, International Review of Civil Engineering, Vol. 1: 165-169, 2010.

C. Djelal, Y. Vanhove, and A. Magnin, Tribological behaviour of self-compacting concrete, Cement and Concrete Research, vol. 34: 821-828, 2004.

L. Libessart, Influence of the composition of mold release agents at the formwork / concrete interface - Impact on the aesthetics of concrete facings, Ph.D. dissertation in French, University of Artois, Béthune, 2006.

T. T. Ngo, E. H. Kadri, R. Bennacer, F. Cussigh, Use of tribometer to estimate interface friction and concrete next term boundary layer composition during the fluid “concrete pumping”, Construction and Building Materials, Vol. 24: 1253-1261, July 2010.

T. T. Ngo, Influence of concrete composition on pumping parameters and validation of a prediction model of the viscous constant, Ph.D. dissertation in French, University of Cergy Pontoise, 2009.

T. Proske, Fresh concrete pressure using self-compacting concrete - A realistic model for determining impacts on formwork and armor, Ph.D. dissertation in German, Technical University of Darmstadt, 2007.

Y. Vanhove, Contribution to the study of the friction of a self-compacting concrete against a metal surface - Application to thrust against formwork, Ph.D. dissertation in French, University of Artois, Béthune, 2001.

Y. Vanhove, C. Djelal, A. Magnin, Device for studying fresh concrete friction, Cement Concrete and Aggregates, vol. 26: 35-41, 2004.

A. M. Neville, Properties of Concrete (Wiley; 4 edition, 1995).

E. P. Koehler, Development of a Portable Rheometer for Portland Cement Concrete, Ph.D. dissertation, University of Texas, Austin, 2004.

E. P. Koehler, D. W. Fowler, C. F. Ferraris, S. Amziane, A New Portable Rheometer for Fresh Self-Consolidating Concrete, Proc. of session ACI, New York, 2005.

F. De Larrard, Concrete mixture proportioning – A scientific approach (Spon Press, 1999).

L. E. Silbert, G. S. Grest, G. W. Landry, Statistics of the contact network in frictional and frictionless granular packing, The American Physical Society, vol. 66:1-9, 2002.

M. R. Rixom, N. P. Mailvaganam, Chemical admixtures for concrete (Spon Press, 1986).


Refbacks

  • There are currently no refbacks.



Please send any question about this web site to info@praiseworthyprize.com
Copyright © 2005-2020 Praise Worthy Prize