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Development of the simple test method with liquid nitrogen for judgement of AE concrete or Non-AE concrete with recycle aggregate made from the concrete damaged of the earthquake disaster

Research Project

Project/Area Number 25630188
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeMulti-year Fund
Research Field Civil engineering materials/Construction/Construction management
Research InstitutionThe University of Tokushima

Principal Investigator

Hashimoto Chikanori  徳島大学, ソシオテクノサイエンス研究部, 教授 (10180829)

Co-Investigator(Kenkyū-buntansha) WATANABE Takeshi  徳島大学, 大学院ソシオテクノサイエンス研究部, 准教授 (50332812)
ISHIMARU Keisuke  徳島大学, 大学院ソシオテクノサイエンス研究部, 技術専門職員 (00380121)
Project Period (FY) 2013-04-01 – 2016-03-31
Project Status Completed (Fiscal Year 2015)
Budget Amount *help
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2015: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2014: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2013: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Keywords震災廃棄コンクリート / 再生骨材 / 凍結融解試験 / AEコンクリート / 相対動弾性係数 / 原コンクリート / 液化窒素 / NonAEコンクリート / AE剤 / 液体窒素 / 凍結融解抵抗性 / 超音波伝播速度 / 廃棄コンクリート / ポーラスコンクリート
Outline of Final Research Achievements

It should be judged that the original concrete is AE concrete or Non-AE concrete in order to produce recycled concrete aggregate from the original concrete. Particularly, this judgment is very important when the recycle aggregate was made from the concrete damaged of the earthquake disaster. In this study, it was carried out that experimental study for the condition of the test method to freezing and thawing using liquid nitrogen for the purpose of establishment of the technique to judge simply and in a short time temporarily on the site. The spraying time of liquid nitrogen was constant for 90 seconds.
As a result, the effective potion of sensors for measurement of time for ultrasonic pulse on the surface of concrete. Also using an industrial dryer was effective for thawing rapidly instead of using the hot water of 40 degrees Celsius. The digging hole on the surface of concrete was not effective for freezing rapidly.

Report

(4 results)
  • 2015 Annual Research Report   Final Research Report ( PDF )
  • 2014 Research-status Report
  • 2013 Research-status Report
  • Research Products

    (6 results)

All 2016 2015 2014

All Journal Article (1 results) (of which Peer Reviewed: 1 results) Presentation (5 results)

  • [Journal Article] 骨材特性がポーラスコンクリートの耐久性に与える影響2014

    • Author(s)
      田中美里,橋本親典,小田島勉,葛西博文
    • Journal Title

      コンクリート工学年次論文集

      Volume: 36 Pages: 730-735

    • Related Report
      2014 Research-status Report
    • Peer Reviewed
  • [Presentation] 原コンクリートのAE剤有無を判定するための液化窒素による簡易試験方法の開発2016

    • Author(s)
      青江匡剛、石丸啓輔、橋本親典、渡辺健
    • Organizer
      土木学会第71回年次学術講演会
    • Place of Presentation
      東北大学(宮城県、仙台市)
    • Year and Date
      2016-09-07
    • Related Report
      2015 Annual Research Report
  • [Presentation] 廃棄コンクリートのAE 剤使用の有無を判定方法する簡易な試験方法の開発2015

    • Author(s)
      平田大希、橋本親典、渡辺健、石丸啓輔
    • Organizer
      土木学会第70回年次学術講演会
    • Place of Presentation
      岡山大学(岡山県、岡山市)
    • Year and Date
      2015-09-16
    • Related Report
      2015 Annual Research Report
  • [Presentation] 骨材特性が異なる砕石を使用したポーラスコンクリートの耐久性に関する実験的検討2014

    • Author(s)
      葛西博文,安倍千香子,小田島勉,橋本親典
    • Organizer
      土木学会四国支部技術研究発表会
    • Place of Presentation
      徳島大学工学部(徳島県徳島市)
    • Year and Date
      2014-05-31
    • Related Report
      2014 Research-status Report
  • [Presentation] FAをセメント内割り30%以上置換した全量再生骨材コンクリートの力学的性質2014

    • Author(s)
      平田大希,橋本親典,渡辺健,石丸啓輔
    • Organizer
      土木学会四国支部技術研究発表会
    • Place of Presentation
      徳島大学工学部(徳島県徳島市)
    • Year and Date
      2014-05-31
    • Related Report
      2014 Research-status Report
  • [Presentation] フライアッシュを多量に使用した全量再生骨材コンクリートの硬化特性2014

    • Author(s)
      平田大希,橋本親典,渡辺健,石丸啓輔
    • Organizer
      日本材料学会四国支部学術講演会
    • Place of Presentation
      徳島大学工学部(徳島県徳島市)
    • Year and Date
      2014-04-19
    • Related Report
      2014 Research-status Report

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Published: 2014-07-25   Modified: 2019-07-29  

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