Silica Fume Effects on the Pull-Out Behavior of Randomly Oriented Steel Fibers from Concrete

Abstract

Silica fume is known to improve the pore system of cementitious pastes and their adhesion capacity to fibers and other mix inclusions. This study has been mainly concerned with the effect of silica fume on the pull-out strength of randomly oriented steel fibers from concrete. Silica fume effects on the fresh mix workability and the overall flexural and compressive behavior of steel fiber reinforced and plain concretes were also assessed. The only variable in different fibrous and plain mixes was the fraction of portland cement substituted with silica fume. This fraction ranged from 0% to 20%.

The workability of plain and fibrous mixes were obtained by slump and inverted slump cone tests, respectively. In both the flexure and compression tests on fiber concrete, the complete load-deformation relationship was obtained. The pull-out strength of randomly oriented fibers was assessed through analysis of the flexural test data.

All aspects of the fresh and hardened steel fiber reinforced concrete performance considered in this study, especially the pull-out strength of randomly oriented fibers from concrete, were observed to improve with the increase in silica fume-cementitious ratio up to a certain limit, after which the trends in silica fume effects were reversed.

This is a preview of subscription content, access via your institution.

References

  1. 1.

    R.F. Feldman, in Fly Ash, Silica Fume, Slag, and Natural Pozzolans in Concrete, V. 2, edited by V. M. Malhorta (American Concrete Institute, Detroit, 1986), pp. 973–990.

  2. 2.

    ACI Committee 126, ACI Material J., 85, 158 (1987).

    Google Scholar 

  3. 3.

    V. Ramakrishnan and V. Srinivasan, the Indian Concrete J., 56, 326 (1982).

    Google Scholar 

  4. 4.

    P. Mehta, Concrete Structure. Properties, and Materials (Prentice-Hall, Inc. Inglewood Cliffs, 1986), P. 75.

    Google Scholar 

  5. 5.

    P. J. Robins and S.A. Austins, in Fly Ash, Silica Fume, Slap, and Natural Pozzolans in Concrete, V. 2, edited by V. M. Malhorta (American Concrete Institute, Detroit, 1986), pp. 941–948.

    Google Scholar 

  6. 6.

    W. R. Grace and Company, Daracem 100, production information brochure.

  7. 7.

    ELKEM Chemicals, Inc. production information brochures on Microsilica Additives.

  8. 8.

    ACI Committee 544, ACI J., 81, 140 (1984).

    Google Scholar 

  9. 9.

    ACI Committee 544, State-of-the-Art Report on Fiber Reinforced Concrete (American Concrete Institute, Detroit, 1982), pp. 16.

  10. 10.

    ACI Committee 544, ACI J., 75, 283 (1978).

    Google Scholar 

  11. 11.

    ASTM Standards, Concrete and Mineral Aggregates. V. 4.02 (American Society of Testing and Materials, Philadelphia, 1987), C 469, pp. 303–307; C 1018, pp. 637–644.

  12. 12.

    P. Soroushian and Z. Bayasi, in ACI Convention on Fiber Reinforced Concrete, Baltimore, 1986.

  13. 13.

    S. Shah, P. Stroven, D. Dalhuison, and P. Stekelenburg, in Testing and Test Methods of Fiber Cement Composites, edited by R.N. Swamy (the Construction Press, Lancaster, 1978), pp. 399–408.

    Google Scholar 

  14. 14.

    D. Fanella and A. Naaman, ACI J., 82, 475 (1985).

    Google Scholar 

  15. 15.

    Z. Bayasi, Ph.D. Thesis, V. 2, Michigan State University (1988).

Download references

Author information

Affiliations

Authors

Corresponding author

Correspondence to Parviz Soroushian.

Rights and permissions

Reprints and Permissions

About this article

Cite this article

Soroushian, P., Bayasi, Z. Silica Fume Effects on the Pull-Out Behavior of Randomly Oriented Steel Fibers from Concrete. MRS Online Proceedings Library 114, 187 (1987). https://doi.org/10.1557/PROC-114-187

Download citation