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Coupling Between Diffusivity and Cracks in Cement-Based Systems

Published online by Cambridge University Press:  10 February 2011

C. Tognazzi,
J-M. Torrenti,
M. Carcasses and
J-P. Ollivier
C. Tognazzi
Affiliation:
DESD/SESD, CEA Saclay, 91 191 Gif sur Yvette, FranceLMDC, INSA-UPS, Complexe Scientifique de Rangueil, 31 007 Toulouse Cedex 4, France
J-M. Torrenti
Affiliation:
ENPC, 6-8 av. Blaise Pascal, 77455 Marne la vallée cedex 2, France
M. Carcasses
Affiliation:
LMDC, INSA-UPS, Complexe Scientifique de Rangueil, 31 007 Toulouse Cedex 4, France
J-P. Ollivier
Affiliation:
LMDC, INSA-UPS, Complexe Scientifique de Rangueil, 31 007 Toulouse Cedex 4, France
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Abstract

In this paper, experimental results and modelling of the coupling between diffusivity and cracks in cement-based systems are presented.

The cracks were generated in samples by means of a compression test. In this test, displacement is controlled, thus controlling the opening of the cracks. Diffusion tests on samples obtained at three different compression levels corresponding to three cracked states were then performed using tritiated water. These tests showed diffusivity was affected by the existence of cracks and the main effect was observed when cracks crossed the whole specimen (e.g. in the post-peak regime of the compression test).

Finally the diffusion test was modelled in a simple way, assuming that the cracks were circumscribed by parallel planes. With this model, an equivalent opening of the cracks, which was of the same order as the opening estimated using strain measurements or image analysis, was obtained.

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References

REFERENCES

1 Torrenti, J.M., Benaija, E.H., Boulay, C., J. Eng. Mech., ASCE, vol. 119, n°12, (1993).Google Scholar
2 Shah, S.P., Sankar, R., ACI Mat. J., vol. 84, pp. 200–212, (1987).Google Scholar
3 Gettu, R., Mobasher, B., Carmona, S., Jansen, D.C., Adv. Cem. Based Mat., 3, pp. 54–71, (1996).Google Scholar
4 Tognazzi, C., Ph. D. Thesis, INSA Toulouse, France, 1998 (in French).Google Scholar
5 Richard, P., Cheyrezy, M., Cem. Conc. Res., vol. 25, n°7, pp. 1501–1511, (1995).Google Scholar
6 Ammouche, A., Breysse, D., in La dégradation des bétons, Ed. Hermès, , 1999, pp. 75–87, (in French).Google Scholar
7 Richet, C., Ph. D. Thesis, Université Paris XI Orsay, France, 1992 (in French).Google Scholar
8 Cranck, J., The Mathematics of diffusion, 2nd Ed., Oxford Science Publications, 1979.Google Scholar
9 Bigas, J-P., Ollivier, J-P., Proceedings du 2éme congrès universitaire de Génie Civil, Poitiers, 6-7 Mai 1999, pp. 82–91 (in French).Google Scholar
10 Mainguy, M., Tognazzi, C., Torrenti, J-M. and Adenot, F., « Modelling of leaching in pure cement paste and mortar », accepted for publication in Cem. Conc. Res., 1999.Google Scholar