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Microstructure of the steel-cement paste interface in the presence of chloride

✍ Scribed by P.J.M. Monteiro; O.E. Gjorv; P.K. Mehta

Publisher
Elsevier Science
Year
1985
Tongue
English
Weight
594 KB
Volume
15
Category
Article
ISSN
0008-8846

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✦ Synopsis

The interface between corroding steel and cement paste containing chloride, with and without condensed silica fume, was studied. For specimens containing only portland cement an interfacial film of large crystals of lime (CH) covered most of the steel surface. Even a 16% replacement of the portland cement with silica fume did not change this feature very much. However, only the specimens with silica fume developed corrosion.

This indicates that the pore solution probably contained a higher CI-/OHratio for a given total chloride content.

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