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Fiber-Matrix Interfacial Area Reduction in Fiber Reinforced Cements and Concretes at Moderate to High Fiber Volume Fractions

Published online by Cambridge University Press:  21 February 2011

Gebran N. Karam
Gebran N. Karam*
Affiliation:
Arlington, MA 02174 formerly Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139
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Abstract

The area and properties of the fiber-matrix interface in fiber reinforced cements and concretes determines the amount of stress transferred forth and back between the cement paste and the reinforcement and hence controls the mechanical properties of the composite. Fiber-fiber interaction and overlap of fibers with fibers, voids and aggregates can dramatically decrease the efficiency of the reinforcement by reducing this interfacial area. A simple model to account for this reduction is proposed and ways to integrate it in the models describing the mechanical properties of short fiber reinforced concretes are presented. The parameters of the model are evaluated from previously published data sets and its predictions are found to compare well with experimental observations; for example, it is able to predict the non-linear variation of bending and tensile strength with increasing fiber volume fraction as well as the existence of an optimal fiber content.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 370: Symposia Va/Vb – Microstructure of Cement-Based Systems/Bonding and Interfaces in Cement... , 1994 , 497
Copyright
Copyright © Materials Research Society 1995

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References

1. Coutts, R.S.P. and Warden, P.G., Int. J. of Cem. Comp. and Lightweight Concr. 9(2), 69–73 (1987).Google Scholar
2. Mai, Y.W., J. Mat. Sci. 14, 2091–2101 (1979).Google Scholar
3. Zhu, W.H., Tobias, B.C., Coutts, R.S.P. and Langfors, G., Cem. and Concr. Comp. 16,3–8(1994).Google Scholar
4. Akihama, S., Tatsuo, S. and Banno, T., Int. J. of Cem. Comp. and Lightweight Concr. 8, (1) 21–33 (1986).Google Scholar
5. Park, S.B., Lee, B.I. and Lim, Y.S., Cem. and Concr. Res. 21,589–600 (1991).Google Scholar
6. Paramasivam, P., Nathan, G.K. and Gupta, N.C. Das, Int. J. of Cem. Comp. and Lightweight Concr. 6, (1) 19–27 (1984).Google Scholar
7. Agarwal, L.K., Cem. and Concr. Comp. 14,63–69 (1992).Google Scholar
8. Coutts, R.S.P., J. Mat. Sci. Let. 6, (8) 955–957 (1987).Google Scholar
9. Coutts, R.S.P., Int. J. of Cem. Comp. and Lightweight Concr. 5 (4), 257–262 (1983).Google Scholar
10. Hannant, D.J., Fibre Cements and Fibre Concretes, (John Wiley and Sons, New York, 1978).Google Scholar
11. Beaudoin, J.J., Cem. and Concr. Res. 13, 153–160 (1983).Google Scholar
12. Coutts, R.S.P., R.S.P., and Warden, P.G., J. Mat. Sci. Let. 4, 117–119 (1985).Google Scholar
13. Bayasi, Z. and Zeng, J., ACI Mat. J. 90, (6) 605–610 (1993).Google Scholar
14. Coutts, R.S.P. and Warden, P.G., Cem. and Concr. Comp. 14, 17–21 (1992).Google Scholar
15. Balaguru, P. and Kendzulak, J., American Concrete Institute SP105-ACI, 247–268 (1984).Google Scholar
16. Low, N.M.P. and Beaudoin, J.J., Cem. and Conr. Res. 22,981–989 (1992).Google Scholar
17. Andonian, R., Mai, Y.W. and Cotterell, B., Int. J. of Cem. Comp. and Lightweight Concr., 1, (3) 151–158 (1979).Google Scholar
18. Coutts, R.S.P., Composites 15, (2) 139–143 (1984).Google Scholar
19. Coutts, R.S.P., Composites 18, (4) 325–328 (1987).Google Scholar
20. Coutts, R.S.P., Int. J. of Cem. Comp. and Lightweight Concr. 11, (3) 143–147 (1989).Google Scholar
21. Karam, G.N., J. of Comp. Tech. and Res. 16, (2) 154–160 (1994).Google Scholar
22. Toutanji, H.A., El-Korchi, T., Katz, R.N. and Leatherman, G.L., Cem. and Concr. Res. 23,618–626 (1993).Google Scholar
23. Karam, G.N., SMCE thesis, Massachusetts Institute of Technology, 1990.Google Scholar
24. Karam, G.N., Composites 22, (2) 81–84 (1991).Google Scholar
25. Wang, Y., Li, V.C. and Backer, S., J. Mat. Sci. 26, 6565–6575 (1991).Google Scholar
26. Coutts, R.S.P. and Warden, P.G., Cem. and Concr. Comp. 12, 151–156 (1992).Google Scholar