Hostname: page-component-586b7cd67f-l7hp2 Total loading time: 0 Render date: 2024-11-29T07:25:10.631Z Has data issue: false hasContentIssue false
  • English
  • Français

The Effect of Blast Furnace Slag on the Microstructure of the Cement Paste/Steel Interface

Published online by Cambridge University Press:  21 February 2011

O. A. Onabolu  and
P. L. Pratt
O. A. Onabolu
Affiliation:
Department of Materials, Imperial College of Science & Technology, Prince Consort Road, London SW7 2BP, UK
P. L. Pratt
Affiliation:
Department of Materials, Imperial College of Science & Technology, Prince Consort Road, London SW7 2BP, UK
Get access

Abstract

The microstructures of steel reinforced ordinary Portland cement mortar samples, and those containing 40% and 70% slag as cement replacement, have been studied by electron optical techniques, after exposure to stagnant sea-water at 23°C for 320 days. Fracture surfaces along the interface with steel were examined using secondary electron imaging in the SEM. This revealed differences between the OPC and slag specimens as regards the morphology of the phases and the amounts of calcium hydroxide present. The microstructure at the interface with steel was studied by means of back scattered electron imaging combined with quantitative image analysis. Chloride concentrations at sections around the interface were determined by means of an EDXA facility linked to the SEM. Even after 320 days immersion in sea-water, there was some calcium hydroxide present in the interfacial zone.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 113: Symposium Q – Fly Ash and Coal Conversion By-Products IV , 1987 , 271
Copyright
Copyright © Materials Research Society 1988

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

REFERENCES

1. Scrivener, K.L. and Gartner, E.M., Mater. Res. Soc., paper in Symp. R (1988).Google Scholar
2. Scrivener, K.L. and Pratt, P.L., Proc. 8th Int. Cong. Chem. Cem., Rio de Janeiro, III, pp. 466–471 (1986).Google Scholar
3. ASTM C109–75.Google Scholar
4. Regourd, M., Pub. ACI SP-65, Detroit, pp. 63–83 (1980).Google Scholar
5. Diamond, S., Proc. 7th Int. Cong. Chem. of Cem., Paris, pp. 113–123 (1980).Google Scholar
6. Al-Khalaf, M.N. and Page, C.L., Cem. Concr. Res., 9, pp. 197–209 (1979).CrossRefGoogle Scholar
7. Bentur, A., Diamond, S. and Mindess, S., J. Mater. Sci., 20, pp. 3610–3620 (1985).CrossRefGoogle Scholar
8. Bentur, A. and Diamond, S., Materials & Structures, 18, pp. 49–56 (1985).CrossRefGoogle Scholar
9. Roy, D.M., Kumar, A. and Rhodes, J.P., Pub. ACI SP-91, Madrid, pp. 1423–1444 (1986).CrossRefGoogle Scholar
10. Sato, K., Konishi, E. and Fukaya, K., Proc. 8th Int. Cong. Chem. of Cem., IV, Rio de Janeiro, pp. 239–244 (1986).Google Scholar
11. Uchikawa, H., Uchida, S. and Ogawa, K., Proc. 8th Int. Cong. Chem. of Cem., IV, Rio de Janeiro, pp. 251–256 (1986).Google Scholar