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2007 Fiscal Year Final Research Report Summary

Change in flowability of self-compacting concrete due to pumping

Research Project

Project/Area Number 18360210
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Civil engineering materials/Construction/Construction management
Research InstitutionKochi University of Technology

Principal Investigator

OUCHI Masahiro  Kochi University of Technology, Faculty of Engineering, Associate Professor (80301125)

Project Period (FY) 2006 – 2007
Keywordsself-compacting concrete / pumping / shear stress / superplasticizer / adsorption / relative surface area / change in flowability
Research Abstract

The mechanism for the reduction in the flowability of fresh mortar of self-compacting concrete was clarified. The main cause for the reduction in the flowability due to pumping was shear stress generated in the mortar rather than the compressive stress. Shear stress dispersed the coagulated particles of cement and that resulted in higher amount of free water and less amount of supeiplasticizer adsorbed to the unit surface area of the particles of cement. That led to lower viscosity and deformability ofthe fresh mortar. The degree ofthe reduction in the viscosity and defonnability ofthe mortar was affected by the water to cement ratio and the initial mixing energy.

  • Research Products

    (16 results)

All 2008

All Journal Article (8 results) (of which Peer Reviewed: 2 results) Presentation (8 results)

  • [Journal Article] Self-compactability of fresh concrete in terms of dispersion and coagulation of particles of cement subject to pumping2008

    • Author(s)
      Ouchi, M., Sakue, J.
    • Journal Title

      Proceedings of the Third North American Conference on the Design and Use of Self-Consolidating Concrete

    • Description
      「研究成果報告書概要(和文)」より
    • Peer Reviewed
  • [Journal Article] 水セメント比と練り混ぜ方法が外力による自己充填モルタルの流動性変化に及ぼす影響2008

    • Author(s)
      中山知大, 大内雅博
    • Journal Title

      土木学会第63回年次学術講演会概要集

      Pages: 641-642

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Change in self-compactability of fresh concrete due to pumping2008

    • Author(s)
      Nakayama, T., Ouchi, M.
    • Journal Title

      Proceedings of The Eleventh East Asia-Pacific Conference on Structural Engineering and Construction

    • Description
      「研究成果報告書概要(和文)」より
    • Peer Reviewed
  • [Journal Article] 高性能AE減水剤を併用した増粘剤がモルタルのブリーディングに及ぼす影響2008

    • Author(s)
      喜多龍三, 大内雅博
    • Journal Title

      土木学会第63回年次学術講演会概要集

      Pages: 491-492

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Self-compactability of fresh concrete in terms of dispersion and coagulation of particles of cement subject to pumping2008

    • Author(s)
      Ouchi, M
    • Journal Title

      Proceedings of the Third North American Conference on the Design and Use of Self-Consolidating Concrete

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Change in the flowability of self-compacting mortar due to external force in terms of water to cement ratio and mixing method (in Japanese)2008

    • Author(s)
      Nakayama, T
    • Journal Title

      Proceedings of the 53rd JSCE Annual meeting

      Pages: 641-642

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Change in self-compactability of fresh concrete due to pumping2008

    • Author(s)
      Nakayama, T
    • Journal Title

      Proceedings of the Eleventh East Asia-Pacific Conference on Structural Engineering and Construction

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Influence of viscosity agent on generation of bleeding from freshmortar using superpplasticizer (in Japanese)2008

    • Author(s)
      Kita, R
    • Journal Title

      Proceedings of the 53rd JSCE Annual meeting

      Pages: 491-492

    • Description
      「研究成果報告書概要(欧文)」より
  • [Presentation] Change in self-compactability of fresh concrete due to pumping2008

    • Author(s)
      Nakayama, T.
    • Organizer
      The Eleventh East Asia-Pacific Conference on Structural Engineering and Construction
    • Place of Presentation
      台湾・台北市
    • Year and Date
      2008-11-21
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] Change in self-compactability of fresh concrete due to pumping2008

    • Author(s)
      Nakayama, T.
    • Organizer
      The Eleventh East Asia-Pacific Conference on Structural Engineering and Construction
    • Place of Presentation
      Taipei, Taiwan.
    • Year and Date
      2008-11-21
    • Description
      「研究成果報告書概要(欧文)」より
  • [Presentation] Self-compactability of fresh concrete in terms of dispersion and coagulation of particles of cement subject to pimping2008

    • Author(s)
      Ouchi, M.
    • Organizer
      The Third North American Conference on the Design and Use of Self-Consolidating Concrete
    • Place of Presentation
      アメリカ・シカゴ
    • Year and Date
      2008-11-18
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] Self-compactability of fresh concrete in terms of dispersion and coagulation of particles of cement subject to pumping2008

    • Author(s)
      Ouchi, M.
    • Organizer
      The Third North American Conference on the Design and Use of Self-Consolidating Concrete
    • Place of Presentation
      Chicago, USA
    • Year and Date
      2008-11-18
    • Description
      「研究成果報告書概要(欧文)」より
  • [Presentation] 水セメント比と練り混ぜ方法が外力による自己充填モルタルの流動性変化に及ぼす影響2008

    • Author(s)
      中山知大
    • Organizer
      土木学会第63回年次学術講演会
    • Place of Presentation
      仙台市
    • Year and Date
      2008-09-09
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] 高性能AE減水剤を併用した増粘剤がモルタルのブリーディングに及ぼす影響2008

    • Author(s)
      喜多龍三
    • Organizer
      土木学会第63回年次学術講演会
    • Place of Presentation
      仙台市
    • Year and Date
      2008-09-09
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] Change in the flowability of self-compacting mortar due to external force in terms of water to cement ratio and mixing method2008

    • Author(s)
      Nakayama, T.
    • Organizer
      The 53rd JSCE Annual meeting
    • Place of Presentation
      Sendai, Japan.
    • Year and Date
      2008-09-09
    • Description
      「研究成果報告書概要(欧文)」より
  • [Presentation] Influence of viscosity agent on generation of bleeding from fresh mortarusing superpplasticizer2008

    • Author(s)
      Kita, R.
    • Organizer
      The 53rd JSCE Annual meeting
    • Place of Presentation
      Sendai, Japan.
    • Year and Date
      2008-09-09
    • Description
      「研究成果報告書概要(欧文)」より

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Published: 2010-06-09  

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