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1994 Fiscal Year Final Research Report Summary

Thermo-dynamics of concrete on generation and coupled transport of mass, energy and momentum.

Research Project

Project/Area Number 05452226
Research Category

Grant-in-Aid for General Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field 土木材料・力学一般
Research InstitutionThe University of Tokyo

Principal Investigator

MAEKAWA Koichi  the University of Tokyo, Faculty of Eng., Associate Prof., 工学部(試), 助教授 (80157122)

Co-Investigator(Kenkyū-buntansha) SHIMOMURA Takumi  the University of Tokyo, Faculty of Eng., Lecturer, 工学部, 講師 (40242002)
Project Period (FY) 1993 – 1994
KeywordsConcrete / Thermo-dynamics / Mass transport / Hydration / Cement / Pore structure / Permeability
Research Abstract

1.Establishment of generalized thermo-dynamic equations on generation and coupled transport of mass, specific energy and momentum
The generalized thermo-dynamic equations which unified the followings are formed and proposed.
(a) Hydration model of cement in consideration of mineral compounds and free water existing in micro-pores of concrete.
(b) Water transport and mass exchange model in micro-pore structures of aggregates, cement matrix and interfacial zone around aggregates.
(c) Specific surface energy model inside micro-pore structures.
Furthermore, computational scheme of the proposed governing equations was developed under given boundary condition of concrete structures. The validity of the system concerned was numerically verified in three-dimensional space.
2.Experimental verification of generalized thermo-dynamic equations
The following actual phenomena were experimentally observed and these were used for experimental verification of the proposed thermo-dynamic equations through a numerical simulation technique.
(a) Drying process and the associated volume change of concrete which contains lightweight artificial aggregates including micro-voids inside it.
(b) Absorption process of water and organic liquid through concrete of absolute drying stage.
(c) Permeability of nitrogen gas through wet concrete.
(d) Water transport and temperature gradient of concrete specimen which is exposed to vacuum environment in one side.
(e) Temperature distribution and water content gradient of concrete under actual open environment after one-day curing.

  • Research Products

    (12 results)

All Other

All Publications (12 results)

  • [Publications] R.P.Chaube: "A study of moisture transport in concrete as a composit material" Proc.of JCI. Vol.16. (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Kishi: "Thermal and mechanical modelling of young concrete based on hydration process of multi-component cement materials21GC02:Proc.of thermal craeking in concrete at early ages" Vol.1. (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] R.P.Chaube: "multi-phase water movement in concrete as a multi component system" Proc.of 5th Int.ConCreep,RILEM. Vol.1. (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 加藤佳孝: "構成鉱物の水和に基づく若材齢コンクリートの強度発現モデル" コンクリート工学年次論文報告集. Vol.16. (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Shimomura: "Micromechanical model for clrying shrinkage of concrete based on tne distribution function of porocity" Proc.of 5th Int.ConCreep,RILEM. Vol.1. (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 下村 匠: "微視的構機に基づくコンクリートの乾燥収縮モデル" 土木学会論文集. (発表予定). (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] R.P.Chaube and K.Maekawa: "A study of moisture transport in concrete as a composite material" Proc.of JCI. Vol.16. (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Kishi and K.Maekawa: "Thermal and mechanical modelling of young concrete based on hydration process of multi-component cement materials" Proc.of Thermal Cracking in Concrete at Early Ages. Vol.1. (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] R.P.Chaube, T.Shimomura and K.Maekawa: "Multi-phase water movement in concrete as a multi-component system" Proc.of Con Creep, RILEM. Vol.1. (1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Y.Kato and T.Kishi: "Strength development model of young concrete based on hydration of constituent minerals of cement" Proc.of JCI. Vol.16. (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Shimomura and K.Maekawa: "Micromechanical model for drying shrinkage of concrete based on the distribution function of porosity" Proc.of Con Creep, RILEM. Vol.1. (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Shimomura and K.Maekawa: "Drying shrinkage model of concrete based on micromechanical aspects" Proc.of JSCE. (appearing). (1995)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1996-04-15  

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