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Corrosion modelling in new concrete types

Mechanistic models as tools for investigation of corrosion on rebars in new concrete types in road environments have been evaluated and simulations have successfully been performed. Promising possibilities to use these models to examine geometrical effects in more than 1D were identified.

Corrosion risk model

The use of mechanistic models enables detailed analysis of properties in reinforced concrete that dictate the initiation of corrosion. These properties are reactions, transport of ions, wetting, dissolution of gases and current distribution over space and time.

However, some modelling parameters and validation examples are still missing. Therefore, the next step is to try to resolve these issues, mainly by setting up experiments in controlled environments. Such work will be quite demanding and require collaboration with more partners.

Project steps

The projekt included several steps of which included: 

  • A literature survey to get an overview of available models and experimental data.
  • Set-up of a mechanistic model in 1D including some validation attempts against measurement data from the project partners.
  • A simplified 2D model study.

Both model types were able to show valuable results in regard to corrosion when the concrete composition and geometry was changed. Several points for improvement of experimental and modelling work were suggested.

 


Summary

Project name

Modelling in new concrete types

Status

Completed

Region

Region Stockholm, Västra Götaland Region

RISE role in project

Coordinator

Project start

Duration

6 months

Total budget

613 930 SEK

Coordinators