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The Diffusion of Chloride Ions in Fly Ash/Cement Pastes and Mortars

Published online by Cambridge University Press:  25 February 2011

R. I. A. Malek ,
D. M. Roy  and
P. H. Licastro
R. I. A. Malek
Affiliation:
Materials Research Laboratory, The Pennsylvania State University, University Park, PA 16802
D. M. Roy
Affiliation:
Also affiliated with the Department of Materials Science and Engineering
P. H. Licastro
Affiliation:
Materials Research Laboratory, The Pennsylvania State University, University Park, PA 16802
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Abstract

Fly ashes having three distinctly different levels of calcium, designated low-calcium (Class F), intermediate-calcium (Class F/C), and high-calcium (Class C), comprised the basic material for the present study. Pastes and mortars were made using cement and one of three types of fly ashes at various levels of replacement and water-solid ratios. Chloride ion diffusion was measured by applying an electrical potential across cured cylindrical samples and measuring the amount of current passed in a certain period of time (proportional to amount of CE” passed in this time). Other supportive measurements were made, e.g. porosity, pore size distribution, water permeability and surface area. The Cl− ion diffusivity was correlated with the chemical composition of fly ash, mix proportion, and water permeability of the hardened paste or mortar.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 85: Symposium M – Microstructural Development During Hydration of Cement , 1986 , 223
Copyright
Copyright © Materials Research Society 1987

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References

REFERENCES

1. Roy, D.M., Proc. Int. Congr. Chem. Cem., 8th, 1986 1, 362–380 (1986).Google Scholar
2. Page, C.L., Short, N.R., and Tarras, A.El, Cem. Concr. Res. 11, 395–406 (1981).CrossRefGoogle Scholar
3. Goto, S. and Roy, D.M., Cem. Concr. Res. 11, 751–758 (1981).Google Scholar
4. Kumar, A., and Roy, D.M., Proc. Int. Congr. Chem. Cem., 8th, 1986 5, 73–79 (1986).Google Scholar
5. Roy, D.M., Kumar, A., and Rhodes, J.P., in Proc Int. Conf. Fly Ash, Silica Fume, Slag and Natural Pozzolanics in Concrete (ACI SP 91–69, 1986) 2, pp. 1423–1444.Google Scholar
6. Page, C.L., Short, N.R., and Holden, W.R., Cem. Concr. Res. 16, 79–86 (1986).CrossRefGoogle Scholar
7. Kumar, A., Ph. D. thesis, The Pennsylvania State University (1985).Google Scholar
8. Goto, S. and Roy, D.M., Cem. Concr. Res. 11, 575–581 (1981).CrossRefGoogle Scholar
9. Weigler, H., Int. Colloq. Corrosion by Chlorides, Vienna, Austria, 1983, pp. 43–53.Google Scholar
10. Shiessl, P., Cem. Concr. Res. 13, 131–143 (1983).Google Scholar
11. Pereira, C.J. and Hegedus, L.L., Inst. Chem. Eng. Symp. Series, No. 87, 427–438 (1984).Google Scholar
12. Uchikawa, H., Uchida, S., and Ogawa, K., Rev. Gen. Meet., Tech. Sess. Cem. Assoc. Jpn., 56–59 (1984).Google Scholar
13. Roy, D.M., Malek, R.I.A., and Silsbee, M., in Proc. Workshop on Blast Furnace Slag Cements and Concretes, Oct. 14–17, York, England (1985).Google Scholar
14. Roy, D.M., Malek, R.I.A., Rattanussorn, M. and Grutzeck, M.W., in Fly Ash and Coal Conversion By-Products: Characterization, Utilization and Disposal II, edited by McCarthy, G.J., Glasser, F.P., and Roy, D.M., (MRS 65, Pittsburgh, 1986) pp. 219–226.Google Scholar
15. Silsbee, M., Malek, R.I.A., and Roy, D.M., Proc. Int. Congr. Chem. Cem., 8th, 1986 IV, 263–269 (1986).Google Scholar
16. Page, C.L. and Vennesland, O., Mater. Constr. (Paris) 16, 19–25 (1983).Google Scholar
17. Diamond, S. and Lopez-Flores, F., J. Am. Ceram. Soc. 64, C–162 (1981).Google Scholar
18. Whiting, D., Federal Highway Administration Report #FHWA/RD-81/119 (1981).Google Scholar
19. White, E.L., Roy, D.M., and Cady, P.D., in Fly Ash and Coal Conversion By-Products: Characterization. Utilization and Disposal III, edited by McCarthy, G.J., Glasser, F.P., Roy, D., and Diamond, S. (MRS 86, Pittsburgh, 1987) pp. 251–264.Google Scholar