CORROSION OF STEEL BARS IN CONCRETE AT JOINTS UNDER TIDAL ENVIRONMENT

This paper describes work in which a detailed investigation on the corrosion of steel bars in concrete made with various joints was conducted. The specimens were exposed to a tidal pool for 25 years, with some specimens also exposed for further deterioration in an accelerated chamber after 25 years. Aspects studied include bond strength, carbonation depth, chloride concentration, electrochemical and physical evaluation of corrosion, and deposits in the joints. Autogenous deposit in the joint plane prevents the corrosion of steel bars in concrete except at the joints with epoxy and latex paste. Presence of voids at the steel-concrete interface is the primary reason for localized corrosion. Brushing off the laitance from the joint surface reduces the carbonation depth through the joint. Application of a mortar coat after brushing off the laitance shows the least carbonation depth compared to the latex paste and epoxy coats. Application of an epoxy coat after brushing off the laitance shows the strongest bond strength, but not the best performance against corrosion of steel bars in concrete at the joint.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/13846872
• Corporate Authors:

  American Concrete Institute (ACI)

  38800 Country Club Drive
  Farmington Hills, MI  United States  48331
• Authors:
  • Mohammed, T U
  • Hamada, H
• Publication Date: 2003-7

Language

• English

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 265-273
• Serial:
  • ACI Materials Journal
  • Volume: 100
  • Issue Number: 4
  • Publisher: American Concrete Institute (ACI)
  • ISSN: 0889-325X
  • Serial URL: https://www.concrete.org/publications/acimaterialsjournal.aspx

Subject/Index Terms

• TRT Terms: Bond strength (Materials); Concrete structures; Corrosion; Joints (Engineering); Marine engineering; Reinforcing steel; Structural connection; Underwater structures
• Subject Areas: Bridges and other structures; Geotechnology; Highways; Materials; I32: Concrete; I35: Miscellaneous Materials;

Filing Info

• Accession Number: 00961649
• Record Type: Publication
• Files: TRIS
• Created Date: Aug 7 2003 12:00AM