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Frost Resistance of Marine Concrete in Cold Regions

Research Project

Project/Area Number 04650416
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field コンクリート工学・土木材料・施工
Research InstitutionKitami Institute of Technology

Principal Investigator

AYUTA Koichi  Kitami Inst.of Tech., Faculty of Eng. Prof., 工学部, 教授 (90003186)

Co-Investigator(Kenkyū-buntansha) SAKURAI Hiroshi  Kitami Inst.of Tech., Faculty of Eng.Assoc.Prof., 工学部, 助教授 (80187088)
Project Period (FY) 1992 – 1993
Project Status Completed (Fiscal Year 1993)
Budget Amount *help
¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 1993: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1992: ¥1,600,000 (Direct Cost: ¥1,600,000)
KeywordsFrost Resistance / Marine Concrete / Exposure Test / Freezing and Thawing / Survey / Reliability Theory / Air Content / Cold Region
Research Abstract

1. Scaling Damage Survey of Marine Concrete in Hokkaido
Eleven concrete structures which were constructed in 1987 were investigated. The main results are as follows. The maximum depth of scaling was 8.6mm, the scaling area became wider with age, and the scaling ratio(the scaling depth multiplied by the scaling area) made rapid progress for the first one or two years after construction.
2. Properties of Concrete Exposed to Tidal or Splash Zone for Five or Seven Years.
The following were confirmed by the results of exposure test of concrete specimens which were exposed to the Sea of Okhotsk. Marine environment in cold regions has extremely severe conditions for concrete. Concrete which contained silica fume or eight percent air volume show good resistance to scaling.
3. Reliability Analysis to Scaling of Concrete Exposed to Splash Zone for 16 Years.
Reliability theory for assessing concrete scaling was attempted. The specimens were one cubic meter and were exposed to the Sea of Okhotsk. The following conclusions were drawn. Weible distribution for reliability function conformed to frequency distribution of scaling depth which were not lower than the set-up ratio. The year lapse of fifty percent reliability for scaling at the constant set-up ratio agreed with the measurements.

Report

(3 results)
  • 1993 Annual Research Report   Final Research Report Summary
  • 1992 Annual Research Report
  • Research Products

    (6 results)

All Other

All Publications (6 results)

  • [Publications] 鮎田耕一: "寒冷地の海域に5〜6年間暴露したコンクリートの性状" 寒地技術シンポジウム講演論文集. 8. 527-532 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 鮎田耕一: "海洋環境下のコンクリートの耐凍害性" 日本コンクリート工学協会自然環境とコンクリート性能に関するシンポジウム論文集. 101-104 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 木村伸之: "寒冷地海洋環境下におけるコンクリートの劣化防止対策" 土木学会北海道支部論文報告集. 50. 1024-1027 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Koichi Ayuta: "Properties of Concrete Exposed to Sea Water for 5 or 6 years in Cold Regions" Proc.of Cold Region Technology Conference. Vol.8. 527-532 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Koichi Ayuta: "Freeze-Thaw Resistance of Concrete in Marine Environment" Proc.of JCI Symnposium on Performance of Concrete under Natural Weathering Conditions. 101-104 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Nobuyuki Kimura: "Scaling Resistance of Concrete Exposed to the Ice Covered Sea" Proc.of JSCE of Hokkaido Chaper. Vol.50. 1024-1027 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary

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Published: 1992-04-01   Modified: 2016-04-21  

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