Corrosion of Steel Bars in Concrete at Joints under Tidal Environment

Tarek Uddin Mohammed, Hidenori Hamada

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

A detailed investigation on the corrosion of steel bars in concrete made with various joints was carried out. The specimens were exposed to a tidal pool for 25 years. Some specimens were also exposed for further deterioration in an accelerated chamber after 25 years. The items of investigation include bond strength, carbonation depth, chloride concentration, electrochemical and physical evaluation of corrosion, and deposits in the joints. Autogenous deposit (healing) in the joint plane prevents the corrosion of steel bars in concrete except at the joints with epoxy and latex paste. The presence of voids at the steel-concrete interface is the main reason for localized corrosion. Brushing off the laitance from the joint surface reduces the carbonation depth through the joint. The application of a mortar coat after brushing off the laitance shows the least carbonation depth compared to the latex paste and epoxy coats. The application of an epoxy coat after brushing off the laitance shows the strongest bond strength, but does not show the best performance against corrosion of steel bars in concrete at the joint.

Original languageEnglish
Pages (from-to)265-273
Number of pages9
JournalACI Materials Journal
Volume100
Issue number4
Publication statusPublished - Jan 1 2003
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Building and Construction
  • Materials Science(all)

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