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**1**- C.A. Scuderi, T.O. Mason, and H.M. Jennings, "Impedance Measurements on Cement Paste," J. Mat. Sci. Lett., 7, 1056-1057 (1988).
**2**- B.J. Christensen, T.O. Mason, and H.M. Jennings, "Influence of Silica Fume on the Early Hydration of Portland Cements Using Impedance Spectroscopy," J. Am. Ceram. Soc.,75 (4), 939-45 (1992).
**3**- P. Gu, Z. Xu, P. Xie, and J.J. Beaudoin, "Application of A.C. Impedance Techniques in Studies of Porous Cementitious Materials, (I). Influence of Solid Phase and Pore Solution on High Frequency Resistance," Cem. Conc. Res., 23, 531-40 (1993).
**4**- Z. Xu, P. Gu, P. Xie, and J.J. Beaudoin, "Application of A.C. Impedance Techniques in Studies of Porous Cementitious Materials, (II). Relationship Between ACIS Behavior anf the Porous Microstructure," Cem. Conc. Res..
**5**- Z. Xu, P. Gu, P. Xie, and J.J. Beaudoin, "Application of A.C. Impedance Techniques in Studies of Porous Cementitious Materials, (III). AC IS Behavior of Very Low Porosity Systems," Cem. Conc. Res.
**6**- P. Gu, P. Xie, and J.J. Beaudoin, "Microstructural Characterization of the Transition Zone in Cement Systems by Means of A.C. Impedance Spectroscopy," Cem. Conc. Res., 23, 581- 91 (1993).
**7**- P. Gu, P. Xie, J.J. Beaudoin, and R. Brouseau, "A.C. Impedance Spectroscopy: I. A New Equivalent Circuit Model for Hydrated Portland Cement Paste," Cem. Concr. Res., 22, 833- 40 (1992).
**8**- P. Gu, P. Xie, J.J. Beaudoin, and R. Brouseau, "A.C. Impedance Spectroscopy: II. Microstructural Characterization of Hydrating Cement-Silica Fume Systems," Cem. Concr. Res., 23, 157-68 (1993).
**9**- P. Xie, P. Gu, Z. Xu, and J.J. Beaudoin, "A Rationalized A.C. Impedance Model for Microstructural Characterization of Hydrating Cement Systems," Cem. Concr. Res., 23, 359-67 (1993).
**10**- R.T. Coverdale, B.J. Christensen, T.O. Mason, H.M. Jennings, D.P. Bentz, and E.J. Garboczi, "Interpretation of Impedance Spectroscopy of Cement Paste via Computer Modeling. Part I: Bulk Conductivtiy and Offset Resistance," J. Mater. Sci. 30, 712-719 (1995).
**11**-
*Impedance Spectroscopy: Emphasizing Solid Materials and Systems*, ed. J.R. MacDonald, Wiley, New York (1987). **12**- Z. Hashin, "Analysis of Composite Materials: A Survey," J. of Applied Mechanics, 50, 481-505 (1983).
**13**- J.R. Hasted,
*Aqueous Dielectrics*, p. 137. Chapman and Hall, London, U.K., 1973. **14**- R.T. Coverdale, E.J. Garboczi, B.J. Christensen, T.O. Mason, and H.M. Jennings, "Computer Simulation of Impedance Spectroscopy in Two Dimensions: Application to Cement Paste," J. Am. Ceram. Soc., 76 (6), 1153-60 (1993).
**15**- W.J. McCarter, S. Garvin, and N. Bouzid, "Impedance Measurements on Cement Paste," J. Mat. Sci. Lett., 7 (7), pp. 1056-57 (1988).
**16**- D.M. Grannan, J.C. Garland, and D.B. Tanner, "Critical Behavior of the Dielectric Constant of a Random Composite near the Percolation Threshold," Phys. Rev. Letts. 46, pp. 375-378 (1981).
**17**- D.J. Bergman and Y. Imry, "Critical Behavior of the Complex Dielectric Constant Near the Percolation Threshold of a Heterogeneous Material," Phys. Rev. Letts. 39, pp. 1222- 1225 (1977).
**18**- D. Stroud and D.J. Bergman, "Frequency dependence of the polarization catastrophe at a metal-insulator transition and related problems," Phys. Rev. B 25, pp. 2061-2064 (1982).
**19**- R.P. Feynman, R.B. Leighton, and M. Sands,
*The Feynman Lectures on Physics, vol. 2*, p. 10-2, Addison-Wesley, Reading, MA (1964). **20**- R.T. Coverdale, E.J. Garboczi, and H.M. Jennings, "An Improved Model for Simulating Impedance Spectroscopy," Comp. Mat. Sci. 3, 465-474 (1995).
**21**- R.T. Coverdale, Ph.D. thesis, Northwestern University, 1993.
**22**- H.F.W. Taylor,
*Cement Chemistry*, p. 159, Academic Press, San Diego (1990). **23**- D.P. Bentz and E.J. Garboczi, "Percolation of Phases in a Three-Dimensional Cement Paste Microstructural Model," Cement and Concrete Research, 21, 325-344 (1991).