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Evaluation of fly ash performance on strength development based on material composition and its application to highly durable concrete

Research Project

Project/Area Number 17K14708
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Civil engineering materials/Construction/Construction management
Research InstitutionHiroshima University

Principal Investigator

Ogawa Yuko  広島大学, 工学研究科, 助教 (30624564)

Project Period (FY) 2017-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2019: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2018: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2017: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywordsフライアッシュ / 早強ポルトランドセメント / セメント有効係数 / 圧縮強度 / 置換率 / 蒸気養生 / 内部養生 / 養生条件 / セメント種類 / 細孔構造 / 土木材料
Outline of Final Research Achievements

The present study aimed to utilize fly ash for cementitious material in precast prestressed concrete, and the cementing efficiency factor of fly ash on the strength development of concrete using high-early-strength Portland cement (HPC) and the effect of curing condition on it were investigated. The results indicated that the k-values in HPC concrete were lower than that in ordinary Portland cement concrete. Additionally, it was found that the internal curing can solve the problem that the k-values under the steam curing condition cannot increase at later ages.

Academic Significance and Societal Importance of the Research Achievements

石炭火力発電の副産物であるフライアッシュは良質なポゾランであるが、養生環境や配合条件に反応が影響を受けること、また化学成分等品質が一定でないことから汎用されていない。本研究では、フライアッシュの強度発現性能を表すセメント有効係数(k値)について、生産性向上において着目されているプレキャストプレストレストコンクリートへの適用を念頭に、早強ポルトランドセメントをベースとして再整理した。さらに蒸気養生により低下する性能を内部養生により回復できる可能性を示し、これらの成果により高耐久コンクリートへのフライアッシュ利用の促進が期待される。

Report

(4 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (4 results)

All 2020 2019

All Journal Article (2 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 2 results) Presentation (2 results) (of which Int'l Joint Research: 1 results)

  • [Journal Article] Effects of porous ceramic roof tile waste aggregate on strength development and carbonation resistance of steam-cured fly ash concrete2020

    • Author(s)
      Ogawa Yuko、Bui Phuong Trinh、Kawai Kenji、Sato Ryoichi
    • Journal Title

      Construction and Building Materials

      Volume: 236 Pages: 117462-117462

    • DOI

      10.1016/j.conbuildmat.2019.117462

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] An investigation on correlation between fly ash reaction and cementing efficiency factor for strength development of concrete2019

    • Author(s)
      Tan Phat Huynh、Yuki Miyoshi、小川由布子、河合研至
    • Journal Title

      コンクリート工学年次論文集

      Volume: 41 Pages: 245-250

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Presentation] 蒸気養生・内部養生を施したフライアッシュモルタルの強度発現性能に対するセメント有効係数の検討2019

    • Author(s)
      陰迫 良、三吉 勇輝、Huynh Tan Phat、小川 由布子、河合 研至
    • Organizer
      第74回土木学会全国大会年次学術講演会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Effect of Curing Temperature on Degree of Fly Ash Reaction and Contribution of Fly Ash to Strength Development of Mortar2019

    • Author(s)
      Yuki Miyoshi, Tan Phat Huynh, Yuko Ogawa, Kenji Kawai
    • Organizer
      The 3rd ACF Symposium on Assessment and Intervention of Existing Structures
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research

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Published: 2017-04-28   Modified: 2021-02-19  

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