Hostname: page-component-78c5997874-ndw9j Total loading time: 0 Render date: 2024-11-18T18:48:54.070Z Has data issue: false hasContentIssue false
  • English
  • Français

Pore Structure, Permeability, And Chloride Diffusion In Fly Ash-And Slag-Containing Pastes And Mortars

Published online by Cambridge University Press:  22 February 2011

R. I. A. Malek ,
D. M. Roy  and
Y. Fang
R. I. A. Malek
Affiliation:
Materials Research Laboratory, The Pennsylvania State University, University Park, PA 16802
D. M. Roy
Affiliation:
Materials Research Laboratory, The Pennsylvania State University, University Park, PA 16802
Y. Fang
Affiliation:
Materials Research Laboratory, The Pennsylvania State University, University Park, PA 16802
Get access

Abstract

The transport of ions through cement pastes and mortars with variable contents of fly ashes and granulated blast-furnace slag from different sources and with variable composition has been investigated. The research included the determination of chloride diffusion rate and chloride permeability in relation to microstructure development. The median pore size generally was much diminished in mature blended material compared with Portland cement (PC) pastes and mortars. It appears that, at the same age, a finer microstructure is generally developed in blended specimens compared to PC specimens. Also, it was found that the microstructure approaches a limiting value at longer ages of hydration. That limiting value may be reached at earlier ages with the blends. The chloride diffusion rates and permeabilities in the blends were significantly lower than PC mixes. A comparison between the blends containing fly ashes and those containing slag was made.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 137: Symposium P – Pore Structure and Permeability of Cementitious Materials , 1988 , 403
Copyright
Copyright © Materials Research Society 1989

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1. Uchikawa, H., in Proc. 8th Intl. Coner. Chem. Cement. Brazil, Vol.1 (Secretaria Geral, Rue da Assembleia, 10–40° and Gr. 4001, 20011, Rio de Janeiro, R.J., Brazil, 1986) pp. 249–280.Google Scholar
2. Kumar, A. and Roy, D.M., in Proc. 8th Intl. Congr. Chem. Cement, Brazil, Vol. I (Secretaria Geral, Rue da Assembleia, 10–40° and Gr. 4001, 20011, Rio de Janeiro, R.J., Brazil, 1986) pp. 73–79.Google Scholar
3. Kumar, A., Roy, D.M., and Higgins., D.D. Concrete (Jan. 1987), 31–32.Google Scholar
4. Hooton, R.D., Blended Cements, ASTM STP 897, pp. 128–143 (1986).Google Scholar
5. S. Li,Roy, D.M. and Kumar, A., Cem. Concr. Res. 15, 1079 (1985).Google Scholar
6. Roy, D.M., in Proc. 8th Intl. Congr. Chem. Cement, Brazil, Vol. I (Secretaria Geral, Rue da Assembleia, 10–40° and Gr. 4001, 20011, Rio de Janeiro, R.J., Brazil, 1986) pp. 362–380.Google Scholar
7. American Association of State Highways Testing Officials, T-227 (1988).Google Scholar
8. Kondo, T. and Oshawa, S, in Proc. 5th Intl. Symr. on the Chem. of Cement, 225 (1968).Google Scholar
9. Roy, D.M., Malek, R. and Licastro, P.H.. in Concrete Durability, K. and B. Mather Intl. Conf., SP-100, Vol.2 (American Concrete Institute, Detroit, 1987) pp. 1459–1476.Google Scholar
10. Malek, R.I.A. and Roy, D.M., in Fly Ash and Coal Conversion By-Products. Characterization, Utilization and Disposal VI, edited by McCarthy, G.J., Glasser, F.P., Roy, D.M. and Hemmings, R.T., Mat. Res. Soc. Syrup. Proc. Vol.113 (Materials Research Society, Pittsburgh, 1988) pp. 291–300.Google Scholar
11. Roy, D.M., in International Workshop on Granulated Blastfurnace Slap in Concrete, Toronto, Canada (American Concrete Institute, Detroit, 1987).Google Scholar