Corrosion of steel bars in cracked concrete made with ordinary Portland, Slag and Fly Ash Cements

Tarek Uddin Mohammed, Toru Yamaji, Toshiyuki Aoyama, Hidenori Hamada

研究成果: 書籍/レポート タイプへの寄稿会議への寄与

18 被引用数 (Scopus)

抄録

Corrosion of steel bars in pre-cracked prism specimens exposed in marine environment for 15-year is presented here. The size of the specimens was 100×100×600 mm. The specimens were made with ordinary portland, slag (Type A, B and C) and fly ash (Type B) cements. A round steel bar of diameter 9 mm was embedded in each specimen. W/C were 0.45 and 0.55. Crack widths were varied from 0.1 to 5 mm. Chloride-ion concentrations in concrete and corrosion of steel bars were evaluated. Narrower cracks ( ≤ 0.5 mm) heal irrespective of the cement types. Chloride ingress and corrosion of steel bars in concrete are highest for the specimens made with ordinary portland cement and lowest for the specimens made with slag cement of Type C. Locations of the maximum corroded area as well as the deepest corrosion pit are not necessarily at or near the cracked region Wider cracks are not healed and maximum corroded area and deepest corrosion pit are observed at the cracked region. The presence of voids at the steelconcrete interface results in corrosion pits even for chloride-ion concentration less than 0.4% of cement by weight.

本文言語英語
ホスト出版物のタイトル7th CANMET/ACI International Conference on Fly Ash, Silica Fume, Slag and Natural Pozzolans in Concrete
出版社American Concrete Institute
ページ699-718
ページ数20
ISBN(電子版)9780870310263
出版ステータス出版済み - 6月 1 2001
外部発表はい
イベント7th CANMET/ACI International Conference on Fly Ash, Silica Fume, Slag, and Natural Pozzolans in Concrete - Chennai, インド
継続期間: 7月 22 20017月 27 2001

出版物シリーズ

名前American Concrete Institute, ACI Special Publication
SP-199
ISSN(印刷版)0193-2527

会議

会議7th CANMET/ACI International Conference on Fly Ash, Silica Fume, Slag, and Natural Pozzolans in Concrete
国/地域インド
CityChennai
Period7/22/017/27/01

!!!All Science Journal Classification (ASJC) codes

  • 土木構造工学
  • 建築および建設
  • 材料科学一般

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