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Development of Blended Cement using Chemical Admixture

Research Project

Project/Area Number 19K04551
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 22010:Civil engineering material, execution and construction management-related
Research InstitutionShimane University

Principal Investigator

ATARASHI DAIKI  島根大学, 学術研究院環境システム科学系, 准教授 (70431393)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2021: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2020: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2019: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Keywords建設材料 / 廃棄物有効利用 / 二酸化炭素排出削減 / 資源循環型社会 / 低炭素社会 / 化学混和剤 / 添加剤 / 反応メカニズム
Outline of Research at the Start

建設産業におけるセメントからのCO2排出量削減と循環型資源有効利用を両立させた我が国の実情に即した汎用型混合セメントを開発することが2030年までの温室効果ガス排出量削減目標を達成するためには急務である。化学混和剤の中にはセメントや混合材自体の水和反応速度を増加させるものが存在することが指摘されているが、化学混和剤を使用して混合セメントの初期強度発現性を改善させようという例はない。本研究では化学混和剤を使用した初期強度発現性を改善させた汎用型混合セメントを開発することを目的として研究を行う。

Outline of Final Research Achievements

In order to analyze the hydration reaction promoting mechanism of blast furnace slag (BFS) by additives, the effects of various additives on the hydration reaction in the BFS-Ca(OH)2 system were investigated focusing on calcium salts. As a result, in the case of gypsum, the reaction ratio of BFS didn’t change, but the combined water increased by producing ettringite. On the other hand, Ca(NO3)2,Ca(NO2)2 and CaCl2 produced highly soluble AFm phases, and showed the effect of significantly increasing both the reaction ratio of BFS and the combined water. We have concluded that the solubility of hydration product can be related to the promotion of the hydration reaction of BFS by the additive.

Academic Significance and Societal Importance of the Research Achievements

化学混和剤を使用し初期強度発現性を改善した汎用型混合セメントを開発することが可能となれば,混合セメントの生産量を増加させセメント産業からのCO2排出量削減と循環型資源有効利用を両立させることが可能となる.さらに本研究により開発された技術は諸外国にも移転可能であり,低炭素化社会における海外のCO2排出権の獲得に対しても非常に重要であると考えられる.

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (12 results)

All 2021 2020 2019

All Journal Article (5 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 5 results) Presentation (7 results) (of which Int'l Joint Research: 3 results)

  • [Journal Article] 高炉スラグの水和反応に及ぼす各種カルシウム塩添加の影響2021

    • Author(s)
      大﨑修也,伊藤貴康,大宅淳一,新大軌
    • Journal Title

      J.Soc.Inorganic.Materials,Japan

      Volume: Vol.28 Pages: 253-258

    • NAID

      40022687679

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] 高炉セメントの水和反応に及ぼすC-S-H早強剤の影響2021

    • Author(s)
      安達丈,新大軌,井元晴丈
    • Journal Title

      コンクリート工学年次論文集

      Volume: Vol.43 Pages: 77-82

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] フライアッシュセメントの初期水和反応に及ぼすアルカノールアミンの影響2020

    • Author(s)
      宋玄眞、新大軌、細川佳史、宮川美穂
    • Journal Title

      Cement Science and Concrete Technology

      Volume: 73

    • NAID

      130007822444

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] 高炉スラグの水和反応に及ぼす亜硝酸カルシウムの影響2020

    • Author(s)
      大﨑修也、新大軌、宋玄眞、須藤裕司
    • Journal Title

      Cement Science and Concrete Technology

      Volume: 73

    • NAID

      130007822437

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Electrokinetic properties and mechanism of chloride binding in 42-month cured cement pastes with fly ash and ground granulated blast furnace slag exposed to seawater2020

    • Author(s)
      Thi Hai Yen Nguyen, K.Tsuchiya, D.Atarashi, H.Yokota
    • Journal Title

      Construction and Building Materials

      Volume: 240 Pages: 117944-117944

    • DOI

      10.1016/j.conbuildmat.2019.117944

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] 高炉スラグの水和反応に及ぼす各種添加剤の影響 その 1.高炉スラグの水和反応性への影響2020

    • Author(s)
      大﨑修也, 新大軌
    • Organizer
      日本セラミックス協会2020年年会講演
    • Related Report
      2019 Research-status Report
  • [Presentation] 高炉スラグの水和反応に及ぼす各種添加剤の影響 その 2.水和生成物と添加剤の作用機構2020

    • Author(s)
      大﨑修也, 新大軌
    • Organizer
      日本セラミックス協会2020年年会講演
    • Related Report
      2019 Research-status Report
  • [Presentation] Analysis of early hydration of Fly ash cement with alkanolamine2019

    • Author(s)
      Hyeonjin Song, Daiki Atarashi, Yoshifumi Hosokawa, Miho Miyakawa
    • Organizer
      The 13th Pacific Rim Conference of Ceramic Societies (PACRIM13)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Effect of Alkanolamine on reaction of 4CaO Al2O3 Fe2O32019

    • Author(s)
      Hyeonjin SONG, Daiki ATARASHI, Yoshifumi Hosokawa, Miho Miyakawa
    • Organizer
      Materials Research Meeting 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Effect of calcium nitrite on hydration of blast furnace slag2019

    • Author(s)
      Shuya Osaki, Daiki Atarashi, Hyeonjin Song, Yuhji Sudoh
    • Organizer
      Materials Research Meeting 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] FAセメント中のFAおよびクリンカーの水和反応に及ぼすアルカノールアミンの影響2019

    • Author(s)
      宋玄眞, 新大軌, 細川佳史, 宮川美穂
    • Organizer
      第73回セメント技術大会
    • Related Report
      2019 Research-status Report
  • [Presentation] 亜硝酸カルシウムを添加した高炉スラグの水和反応2019

    • Author(s)
      大﨑修也, 新大軌, 宋玄眞, 須藤裕司
    • Organizer
      第73回セメント技術大会
    • Related Report
      2019 Research-status Report

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Published: 2019-04-18   Modified: 2023-01-30  

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