REPAIR OF CONCRETE BRIDGES DAMAGED BY CORROSION OF STEEL BARS IN COASTAL AREAS

In coastal areas, chloride carried by wind sticks to the surface of concrete structures and penetrates into the inside. This chloride, when it accumulates to a certain degree around reinforcing steel bars, causes corrosion and expansion of the corroded steel damages the cover and results in the loss of cross section and a reduction in the load capacity of the structures. The main repair methods presently used are coating, repair of the cross sections of concrete members, electro-chemical treatments and combinations of these. It is indispensable to adopt an adequate repair method to prevent the resumption of corrosion of steel by estimating the diffusion of chloride ions the concrete. This paper reports the situation of the penetration of chloride ions in existing concrete structures in coastal areas on the Sea of Japan. It also reports the estimation of the amount of chloride ions in concretes and their diffusion rate. In this study, repairs adapted to the estimation were discussed. (a) For the covering entry of this conference, please see ITRD abstract no. E204151.

• Corporate Authors:

  ROAD ENGINEERING ASSOCIATION OF ASIA AND AUSTRALASIA (REAAA)

  46B, JALAN BOLA TAMPAR 13/14, SECTION 13
  SHAH ALAM,   Malaysia  40100
• Authors:
  • HIRA, T
  • NOMURA, M
  • KINBARA, H
• Publication Date: 2000

Language

• English

Media Info

• Pagination: 11 p.
• Serial:
  • ROAD ENGINEERING ASSOCIATION OF ASIA AND AUSTRALASIA (REAAA) CONFERENCE, 10TH, 2000, TOKYO, JAPAN
  • Publisher: ROAD ENGINEERING ASSOCIATION OF ASIA AND AUSTRALASIA (REAAA)

Subject/Index Terms

• TRT Terms: Bars (Building materials); Bridges; Chlorides; Concrete; Conferences; Corrosion; Loss and damage; Maintenance; Repairing; Steel; Wind
• ITRD Terms: 3461: Bar; 3455: Bridge; 4755: Concrete; 8525: Conference; 5252: Corrosion; 1614: Damage; 7314: Halide; 3847: Maintenance; 3635: Repair; 4542: Steel; 2554: Wind
• Subject Areas: Bridges and other structures; Maintenance and Preservation;

Filing Info

• Accession Number: 00937182
• Record Type: Publication
• Source Agency: ARRB
• Files: ITRD, ATRI
• Created Date: Feb 5 2003 12:00AM