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Present limitations of models for predicting chloride ingress into reinforced concrete structures

In English

Författare

Summary, in English

Models to predict chloride ingress are numerous but all of them have serious limitations that restrict the present use for long term predictions. An overview is given of the fundamental differences between various models, from those based on Fick's 2nd with constant or time-dependent diffusion coefficients and surface chloride contents, to those based on chloride transport equations with or without a multi-species approach. The key advantages and limitations of each type of model are identified and the research needs are summarized and discussed. The three main limitations are shown to be (i) the lack of understanding the time-dependency of the apparent chloride diffusion coefficients, (ii) the lack of good long-term data, the chloride content increase with time close to the exposed surface and (iii) the difficulties in quantifying the boundary conditions for sophisticated ingress models.

Publiceringsår

2006

Språk

Engelska

Sidor

123-130

Publikation/Tidskrift/Serie

Journal de Physique IV

Volym

136

Dokumenttyp

Artikel i tidskrift

Förlag

EDP Sciences

Ämne

  • Materials Engineering

Nyckelord

  • Surface chloride content
  • Chloride transport equations

Conference name

International Workshop NUCPERF 2006: Corrosion and Long Term Performance of Concrete in NPP and Waste Facilities

Conference date

2006-03-27 - 2006-03-30

Conference place

Cadarache, France

Status

Published

ISBN/ISSN/Övrigt

  • ISSN: 1155-4339