Concrete after 30 years of exposure - Part II: Chloride ingress and corrosion of steel bars

Tarek Uddin Mohammed, Hidenori Hamada, Toru Yamaji

研究成果: ジャーナルへの寄稿学術誌査読

34 被引用数 (Scopus)

抄録

A detailed investigation on 30-year-old concrete specimens of 150 and 300 mm in diameter and height, respectively, made with ordinary Portland cement (OPC), high early-strength portland cement (HES), moderate heat portland cement (MH), Type B slag cement (SCB), and alumina cement (AL) was carried out. Three steel bars were embedded at cover depths of 20, 40, and 70 mm. Carbonation depth, water- and acid-soluble chloride contents, and electrochemical and physical evaluation of corrosion were evaluated. Chloride ingress in concrete was lower for slag and alumina cements compared with the others. More corrosion over the steel bars, however, was found for alumina cement due to the porous steel-concrete interface. The surface condition of the steel bars embedded in concrete made with slag cements remains the same as the initially polished condition. Using slag cement is concluded as one of the best choices to improve the long-term durability of marine concrete structures.

本文言語英語
ページ(範囲)13-18
ページ数6
ジャーナルACI Materials Journal
101
1
出版ステータス出版済み - 1月 2004
外部発表はい

!!!All Science Journal Classification (ASJC) codes

  • 土木構造工学
  • 建築および建設
  • 材料科学(全般)

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