CORROSION OF STEEL IN CONCRETE

The research work that is presented in this thesis aims at mapping out the various mechanisms which control the process of steel corrosion in concrete. The process of corrosion is illustrated with a schematic model where the service life is divided into a period of initiation and a period of propagation. The time up to the initiation of the corrosion process is determine by the flow of penetrating substances into the concrete cover and by the threshold concentration for corrosion to start. Theoretical models have been produced to approximate the time of initiation. The rate of corrosion in the propagation period can be described by the relative humidity in the concrete and the mean temperature of the structure. Different relations between these factors and the rate of corrosion have been put up for different initiation mechanisms. The final state, cracked concrete covers, reduced cross-section area of the steel etc is discussed in the model. Other important factors, which have not been dealt with in the model, are also discussed. A method for predicting service life of concrete structures is presented. The report also includes applications in various forms of the method. The report is concluded with a documentation of laboratory investigations carried out by the author. (Author/TRRL)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/03466906
• Corporate Authors:

  Cement and Concrete Research Institute

  Drottning Kristinas Vaeg 26
  Stockholm 70,   Sweden 
• Authors:
  • TUUTTI, K
• Publication Date: 1982

Media Info

• Features: Figures; Photos; References; Tables;
• Pagination: 468 p.
• Serial:
  • CBI Forsk/Research
  • Issue Number: 4
  • Publisher: Cement and Concrete Research Institute
  • ISSN: 0346-6906

Subject/Index Terms

• TRT Terms: Carbonation; Chlorides; Corrosion; Deterioration; Forecasting; Humidity; Mathematical models; Pendulum tests; Reinforced concrete; Reinforcing steel; Service life; Steel; Temperature; Time
• Uncontrolled Terms: Causes
• ITRD Terms: 4577: Aggregate; 7353: Alkali; 7393: Carbon dioxide; 7312: Carbonate; 9003: Cause; 4758: Cement; 4755: Concrete; 5252: Corrosion; 5255: Deterioration; 7314: Halide; 6473: Mathematical model; 9047: Mixture; 7372: Oxide; 6285: Penetration; 5921: Permeability; 4794: Reinforced concrete; 7148: Silicon; 4542: Steel; 7310: Sulphate; 5414: Time
• Subject Areas: Design; Geotechnology; Highways; Materials; I34: Steels and Metals;

Filing Info

• Accession Number: 00376006
• Record Type: Publication
• Source Agency: Swedish National Road and Transport Research Institute (VTI)
• Report/Paper Numbers: Monograph
• Files: ITRD, TRIS, ATRI
• Created Date: Jul 30 1983 12:00AM