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The Nature of the Concrete-Steel Rebar Interface in Plain and Silica Fume Concrete

Published online by Cambridge University Press:  15 February 2011

Abla M. Zayed
Abla M. Zayed*
Affiliation:
Department of Civil Engineering and Mechanics, University of South Florida, Tampa; Florida 33620
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Abstract

In this investigation the nature and morphology of the concrete-reinforcing steel interface is studied. The effect of the partial replacement of cement by silica fume on the interface microstructure was determined. The distribution profiles of percentage porosity, calcium hydroxide and unreacted cement from the interface towards the concrete bulk were measured using the scanning electron microscope operated in the back scattering mode. The findings indicate the similarities between the morphology of the concrete-steel interface and those reported earlier in the literature for the concrete-aggregate interface. Additions of silica fume resulted in a decrease of the interface porosity and calcium hydroxide content.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 245: Symposium K – Advanced Cementitious Systems: Mechanisms and Properties , 1991 , 341
Copyright
Copyright © Materials Research Society 1992

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References

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