Hostname: page-component-78c5997874-g7gxr Total loading time: 0 Render date: 2024-11-10T08:57:41.791Z Has data issue: false hasContentIssue false
  • English
  • Français

High-Strength Concrete with Increased Fracture-Toughness

Published online by Cambridge University Press:  16 February 2011

Mette Glavind  and
Tine Aarre
Mette Glavind
Affiliation:
Department of Structural Engineering, Building 118, Technical University of Denmark, DK- 2800 Lyngby. Denmark.
Tine Aarre
Affiliation:
Department of Structural Engineering, Building 118, Technical University of Denmark, DK- 2800 Lyngby. Denmark.
Get access

Abstract

The application of high-strength concrete in practice is strongly limited by its more brittle behaviour than normal strength concrete.

The present study deals with an investigation of the possibilities of increasing the fracture toughness of high-strength concrete by adding fibres. Tests are made with both normal strength concrete and high-strength concrete containing different amounts of steel and polypropylene fibres. Stress-strain curves in compression are obtained by a deformation controlled test system. The toughness is described with different toughness indexes.

By using a previously proposed expression for the stress-strain curves, it is possible to make a non-linear load carrying capacity calculation for reinforced concrete beams. The results of the load carrying capacity calculation are compared with results of similar calculations made with the Danish code extrapolated to be valid for high-strength concrete.

The investigation shows that the addition of especially steel fibres is effective in increasing toughness and the non-linear load carrying capacity for high-strength concrete. It is also shown that the compression strength of high-strength concrete is increased by addition of steel fibres. The results of the load carrying capacity calculation show that the Danish code cannot be extrapolated to be valid for high-strength concrete without any modifications.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 211: Symposium O – Fiber-Reinforced Cementitious Materials , 1990 , 39
Copyright
Copyright © Materials Research Society 1991

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1. Olsen, N.H.: “Uniaxial Stress-Strain Curves of High Strength Concrete”, PhD thesis, Department of Structural Engineering, Technical University of Denmark, 1990.Google Scholar
2. Wang, Youjiang and Backer, Stanley: “Toughness Determination for Fibre Reinforced Concrete”, The International Journal of Cement Composites and Lightweight Concrete, February 1989, Volume 11, Number 1, pp. 11–19.Google Scholar
3. Sargin, M.: “Stress-Strain Relations for Concrete and the Analysis of Structural Concrete Sections”, Solid Mechanics Division, University of Waterloo, 1971.Google Scholar
4. Wang, T.P., Shah, S.P. and Naaman, A.E.: “Stress-Strain Curves of Normal and Lightweight Concrete in Compression”, ACI Journal, November 1978, 603–611.Google Scholar
5. Craig, R., Fiber Reinforced Concrete Properties and Application, edited by S.P., Shah and G.B., Baston (ACI SP105 1987) pp. 517–555.Google Scholar