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Elucidation of essential rheological property of Bingham fluid based on the focal point formation among flow curves of fresh cementitious materials

Research Project

Project/Area Number 15K14011
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 Tokyo

Principal Investigator

KISHI TOSHIHARU  東京大学, 生産技術研究所, 教授 (90251339)

Project Period (FY) 2015-04-01 – 2017-03-31
Project Status Completed (Fiscal Year 2016)
Budget Amount *help
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2015: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Keywordsコンクリート / フレッシュ / レオロジー / ビンガム流動 / 流動曲線 / 焦点 / 流動速度分布 / 二次関数 / 流動 / 塑性粘度 / 単純ずり
Outline of Final Research Achievements

It is known that rheological property of fresh cement mortar with superplasticizer shows Bingham fluid character which has plastic viscosity and yielding value. It is also found that the linear shear strain and shear stress relationship of these Bingham fluids which have different plastic viscosities due to different dosage of superplasticizer cross and form clear focal point in the third quadrant. In this research it was found that this focal point shifts linearly according to the dynamic change between local shear strain and apparent one. Consequently, it is hypothesized that the position of focal point on its locus is changed according to clearance between rotor and outer wall of the rotating viscometer. Further, detailed data of non-linear flow rate distribution in space detected by MRI in the published literatures were analyzed in this research and it was found that they can be clearly represented by quadratic function or cubic one.

Report

(3 results)
  • 2016 Annual Research Report   Final Research Report ( PDF )
  • 2015 Research-status Report
  • Research Products

    (5 results)

All 2016 2015

All Journal Article (4 results) (of which Peer Reviewed: 4 results,  Acknowledgement Compliant: 2 results) Presentation (1 results)

  • [Journal Article] 二重円筒間のセメントペーストの流動特性と粒子分散系の流動速度分布に関する研究2016

    • Author(s)
      山崎慈生,岸利治
    • Journal Title

      コンクリート工学年次論文集

      Volume: Vol.38, No.1 Pages: 1341-1346

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] モルタルのビンガムモデル近似直線の焦点性およびその軌跡に及ぼす散剤種類の影響2016

    • Author(s)
      松本利美,岸利治
    • Journal Title

      コンクリート工学年次論文集

      Volume: Vol.38, No.1 Pages: 1365-1370

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] ビンガム流動近似したフレッシュモルタルが示すレオロジー挙動の焦点性2015

    • Author(s)
      松本利美,岸利治
    • Journal Title

      コンクリート工学年次論文集

      Volume: Vol.37, No.1 Pages: 1051-1056

    • Related Report
      2015 Research-status Report
    • Peer Reviewed
  • [Journal Article] 普通ポルトランドセメントまたは石灰石微粉末を用いたフレッシュモルタルのレオロジー特性に関する一検討2015

    • Author(s)
      大野誠彦,岸利治
    • Journal Title

      コンクリート工学年次論文集

      Volume: Vol.37,No.1 Pages: 1057-1062

    • Related Report
      2015 Research-status Report
    • Peer Reviewed
  • [Presentation] 普通ポルトランドセメントまたは石灰石微粉末を用いたフレッシュモルタルのレオロジー特性に関する一検討2015

    • Author(s)
      大野誠彦,岸利治
    • 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 Research-status Report

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Published: 2015-04-16   Modified: 2018-03-22  

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