LONG TERM PERFORMANCE OF CONCRETE BRIDGES

This article describes the author's work to develop deterioration models for concrete bridges in the Greater London area. The models were based on the inspection and repair methods of many bridges owned by London Underground and Railtrack. There were routine, special, and principal inspections from which a computer database was compiled of the defect histories of 725 concrete members from 439 bridges during the last 60 years. Analysis of this database will provide further information about deterioration rates. In an attempt to correlate different deterioration rates with other relevant factors, a sample of 40 bridges was visually and physically examined, and material samples were removed for laboratory analysis. The air permeability and relative humidity of the cover concrete are also being measured at 150 locations on these bridges. The authors applied non-destructive and/or partial destructive testing on 46 structures found suitable for testing. Wide variations were found in the depths and rates of carbonation in bridges, within apparently good concrete. Rates of deterioration were found to vary very considerably, but appeared to be fairly well correlated with the elements' general quality of construction and amount of exposure received during their lives.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/09670726
• Corporate Authors:

  PALLADIAN PUBLICATIONS LTD

  THE OLD FORGE
  ELSTEAD, SURREY  United Kingdom  GU8 6DD
• Authors:
  • RIGDEN, S R
  • TAJALLI, SMA
  • BURLEY, E
  • ABU-TEIR, A I
• Publication Date: 1996

Language

• English

Media Info

• Features: References;
• Pagination: p. 36-8
• Serial:
  • CONSTRUCTION REPAIR
  • Volume: 10
  • Issue Number: 4
  • Publisher: PALLADIAN PUBLICATIONS LTD
  • ISSN: 0967-0726

Subject/Index Terms

• TRT Terms: Bridges; Chemical analysis; Data banks; Data collection; Defects; Deterioration; Digital computers; History; Mathematical analysis; Mathematical models; Measurement; Moisture content; Nondestructive tests; Reinforced concrete; Repairing; Surveillance; Test procedures
• ITRD Terms: 6471: Analysis (math); 3455: Bridge; 7163: Chemical analysis; 8623: Data acquisition; 8614: Database; 5238: Defect (tech); 5255: Deterioration; 8673: Digital computer; 9096: History; 6473: Mathematical model; 6136: Measurement; 5920: Moisture content; 6216: Non destructive testing; 4794: Reinforced concrete; 3635: Repair; 9101: Surveillance; 6288: Test method
• Subject Areas: Bridges and other structures; History;

Filing Info

• Accession Number: 00729743
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Files: ITRD
• Created Date: Dec 26 1996 12:00AM