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Chloride ingress in cement paste and mortar

Mejlhede Jensen, O. / Freiesleben Hansen, P. / Coats, A.M. / Glasser, F.P.

In this paper chloride ingress in cement paste and mortar is followed by electron probe microanalysis. The influence of several paste and exposure parameters on chloride ingress are examined (e.g., water-cement ratio, silica fume addition, exposure time, and temperature). The measurements are modelled on Fick's law modified by a term for chloride binding. Inclusion of chloride binding significantly improves the profile shape of the modelled ingress profiles. The presence of fine aggregate and formation of interfacial transition zones at paste-aggregate boundaries does not significantly affect diffusion rates.

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Chloride ingress in cement paste and mortar

Mejlhede Jensen, O. / Freiesleben Hansen, P. / Coats, A.M. / Glasser, F.P.

In this paper chloride ingress in cement paste and mortar is followed by electron probe microanalysis. The influence of several paste and exposure parameters on chloride ingress are examined (e.g., water-cement ratio, silica fume addition, exposure time, and temperature). The measurements are modelled on Fick's law modified by a term for chloride binding. Inclusion of chloride binding significantly improves the profile shape of the modelled ingress profiles. The presence of fine aggregate and formation of interfacial transition zones at paste-aggregate boundaries does not significantly affect diffusion rates.

Chloride ingress in cement paste and mortar

Mejlhede Jensen, O. / Freiesleben Hansen, P. / Coats, A.M. / Glasser, F.P.

In this paper chloride ingress in cement paste and mortar is followed by electron probe microanalysis. The influence of several paste and exposure parameters on chloride ingress are examined (e.g., water-cement ratio, silica fume addition, exposure time, and temperature). The measurements are modelled on Fick's law modified by a term for chloride binding. Inclusion of chloride binding significantly improves the profile shape of the modelled ingress profiles. The presence of fine aggregate and formation of interfacial transition zones at paste-aggregate boundaries does not significantly affect diffusion rates.

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Title:

Chloride ingress in cement paste and mortar

Contributors:

Mejlhede Jensen, O. (author) / Freiesleben Hansen, P. (author) / Coats, A.M. (author) / Glasser, F.P. (author)

Published in:

Cement and Concrete Research ; 29 ; 1497-1504

Publication date:

1999

Size:

8 Seiten, 11 Quellen

ISSN:

DOI:

https://doi.org/10.1016/S0008-8846(99)00131-3

Type of media:

Article (Journal)

Type of material:

Print

Language:

English

Keywords:

Mörtel , Elektronenmikroskopie , mathematisches Modell , Diffusion , Zuschlagstoff , Grenzfläche , Auslaugen (Verfahrenstechnik) , Plastifiziermittel , Ficksches Gesetz , Beton , anorganische Verbindung , Wasser-Zement-Wert , Mikrosilica , Hochleistungsbeton

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Chloride ingress in cement paste and mortar measured by electron probe micro analysis

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Chloride ingress in cement paste and mortar - Its solid solutions and their role in chloride binding

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