IN SITU ASSESSMENT OF DURABILITY OF CONCRETE MOTORWAY BRIDGES. DURABILITY OF CONCRETE. G.M. IDORN INTERNATIONAL SYMPOSIUM, 1990 ANNUAL ACI CONVENTION, TORONTO, ONTARIO, CANADA

Assessment of durability of concrete motorway bridges in Northern Ireland is part of a programme of collaborative research of the Civil Engineering Department with the Roads Services of the Department of Environment (Northern Ireland). This involves testing bridges on site in order to develop methods which can be used to investigate the condition of approximately 1300 reinforced concrete bridges in the province so that a planned maintenance scheme can be proposed. This paper describes results of comprehensive tests which were carried out on a severely delaminated motorway bridge both prior to and after repair. It has been observed that the strength of concrete is not a reliable index of proneness to deterioration, but permeability results allied to the knowledge of exposure to salt are more likely to provide a useful guide to the durability. The in-situ tests for sorptivity indicated that with the two silane treated bridges, one keeps the moisture out whereas the other fails to do so. High permeability concrete combined with leaking expansion joints have been found to be the main causes of absorption of chloride and the corrosion of steel.

• Supplemental Notes:
  • The G.M. Idorn International Symposium on Durability of Concrete, sponsored by Committee 201 on Durability, was held at the 1990 Annual ACI Convention in Toronto, Ontario, Canada.
• Corporate Authors:

  American Concrete Institute

  P.O. Box 19150, Redford Station, 22400 Seven Mile Road
  Detroit, MI  United States  48219
• Authors:
  • Basheer, PAM
  • MONTGOMERY, F R
  • LONG, A E
• Conference:
  • The G.M. Idorn International Symposium on Durability of Concrete, sponsored by Committee 201 on Durability, was held at the 1990 Annual ACI Convention in Toronto, Ontario, Canada.
• Publication Date: 1992

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 305-319

Subject/Index Terms

• TRT Terms: Adsorption; Bridges; Concrete; Corrosion; Deterioration; Durability; Field tests; Permeability; Strength of materials; Test procedures; Testing
• Old TRIS Terms: In situ test methods
• Subject Areas: Bridges and other structures; Highways; Materials; I32: Concrete;

Filing Info

• Accession Number: 00622497
• Record Type: Publication
• Report/Paper Numbers: SP-131
• Files: TRIS
• Created Date: Jun 30 1992 12:00AM