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The corrosion rate in reinforced concrete facades exposed to outdoor environment

Research output: Contribution to journalArticleScientificpeer-review

Details

Original languageEnglish
JournalMaterials and Structures
Volume50
Issue number23
Early online date10 Aug 2016
DOIs
Publication statusPublished - Feb 2017
Publication typeA1 Journal article-refereed

Abstract

Outdoor concrete structures such as concrete facade panels and balcony frame panels are subjected to various environmental actions causing reinforcement corrosion problems. Long-term field measurement data on reinforcement corrosion in carbonated concrete on these structures was utilized in the creation of a corrosion rate regression model combining weather parameters such as temperature, relative humidity, wind-driven rain and solar radiation to corrosion rate. A versatile model capable of predicting the effect of varying environmental actions on the corrosion rates of carbonation induced corrosion was produced. Wind-driven rain was found to have the greatest impact on corrosion rate in tandem with the micro climate surrounding the building. Due to changes in air temperature, air relative humidity as well as in the amount of wind-driven rain and solar radiation, the corrosion rate on concrete facades and balconies is constantly changing. Despite the high seasonal and yearly variation, the average level of the modelled corrosion rate was quite steady on a longer 30-year perspective. This information is substantial for the long term service life design of concrete structures.

Keywords

  • Carbonation, Concrete, Corrosion, Field measurement, Modelling, Reinforcement, Service life design

Publication forum classification

Field of science, Statistics Finland