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Experimental and Computer Simulation Results for the Electrical Conductivity of Portland Cement Paste

Published online by Cambridge University Press:  15 February 2011

B.J. Christensen
Affiliation:
Northwestern University, Department of Materials Science, Evanston, IL
T.O. Mason
Affiliation:
Northwestern University, Department of Materials Science, Evanston, IL
H.M. Jennings
Affiliation:
Northwestern University, Department of Materials Science, Evanston, IL
D.P. Bentz
Affiliation:
National Institute of Standards and Technology, Building Materials Division, Gaithersburg, MD.
E.J. Garboczi
Affiliation:
National Institute of Standards and Technology, Building Materials Division, Gaithersburg, MD.
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Abstract

The electrical conductivity of portland cement paste is an important transport property, especially since, when properly normalized by the pore fluid conductivity, it is equivalent to the normalized ionic diffusivity of the material via the Nernst-Einstein relation. This paper presents experimental and computer simulation results for σ/σo, where σ is the conductivity of the bulk paste as determined from impedance spectroscopy, and σo is the conductivity of the pore solution. Comparison between simulation and experiment is carried out for an 0.5 water:cement ratio white cement paste as a function of capillary porosity. The quantitative agreement between theory and experiment is reasonable.

Type
Research Article
Copyright
Copyright © Materials Research Society 1992

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References

REFERENCES

[1] Christensen, B.J., Mason, T.O., and Jennings, H.M., ”Influence of Silica Fume on the Early Hydration of Portland Cements using Impedance Spectroscopy”, J. Am. Ceram. Soc, in press.Google Scholar
[2] Garboczi, E.J. and Bentz, D.P., ”Computer Simulation of the Diffusivity of Cement Paste”, J. Mater. Sci., in press.Google Scholar
[3] Garboczi, E.J., Cem. and Conc. Res. 20, 591 (1990).10.1016/0008-8846(90)90101-3Google Scholar
[4] Wong, P., Koplik, J., and Tomanic, J.P., Phys. Rev. B30, 6606 (1984).10.1103/PhysRevB.30.6606Google Scholar
[5] Archie, G.E., AIME Trans. 146, 54 (1942).10.2118/942054-GGoogle Scholar
[6] Johnson, D.L., Koplik, J., and Schwartz, L.M., Phys. Rev. Letts. 57, 2564 (1986).10.1103/PhysRevLett.57.2564Google Scholar
[7] Atkinson, A. and Nickerson, A.K., J. Mater. Sci. 19, 3068 (1984).10.1007/BF01026986Google Scholar
[8] Bonanos, N., Steele, B. C. H., Butler, E. P., Johnson, W. B., Worrell, W. L., McDonald, D. D., and McKubre, M. D. H., in Impedance Spectroscopy: Emphasizing Solid Materials and Systems, edited by McDonald, J. R. (Wiley and Sons, NY, 1987), Chapter 4.Google Scholar
[9] Barneyback, R. S. Jr., and Diamond, S., Cem. Concr. Res. 11, 279 (1981).10.1016/0008-8846(81)90069-7Google Scholar
[10] Mindess, S. and Young, J.F., Concrete (Prentice-Hall, Engelwood Cliffs, 1981), p. 103.Google Scholar
[11] Bentz, D.P. and Garboczi, E.J., Cem. and Conc. Res. 21, 325 (1991).10.1016/0008-8846(91)90014-9Google Scholar
[12] Kirkpatrick, S., Rev. Mod. Phys. 45, 574 (1973).10.1103/RevModPhys.45.574Google Scholar
[13] Rue, R.E. De La and Tobias, C.W., J. of the Electrochem. Soc. 106, 827 (1959).10.1149/1.2427505Google Scholar
[14] Jennings, H.M., Dalgleish, B.J., and Pratt, P.L., J. Am. Ceram. Soc. 64, 567 (1981).10.1111/j.1151-2916.1981.tb10219.xGoogle Scholar