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1993 Fiscal Year Final Research Report Summary

Comprehensive Estimation Chemical Prestress and Chemical Press

Research Project

Project/Area Number 04650418
Research Category

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

Allocation TypeSingle-year Grants
Research Field コンクリート工学・土木材料・施工
Research InstitutionGunma University

Principal Investigator

TSUJI Yukikazu  Gunma University, Faculty of Engineering Professor, 工学部, 教授 (50048922)

Project Period (FY) 1992 – 1993
KeywordsExpansive Concrete / Chemical Prestress / Chemical Press / Expansive Energy / Compressive Strength / Young's Modulus / Method of Restraint
Research Abstract

Effects of chemical prestress and estimation of expansive energy of expansive concrete are comprehensively discussed on the basis of experiments using uniaxially restrained expansive concrete beams with different fiber reinforced plastics and triaxially restrained cylindrical specimens with piled-up steel rings and steel bars. Both the durableness of expansive energy and the effect of chemical press also are investigated.
(1) Aproposed multiaxial restraint testing apparatus consists of piled-up steel rings for the radial restraint and steel bars with end plates for the axial restraint. the testing method is effective in measuring the expansive energy and performing the compressive strength test in order to ascertain the chemical press.
(2) The work quantity transferred to steel rings in radial direction was a constant value if the degree of the restraint was changed from 16% to 28%.
(3) The ratio of residual expansive energy after two year's triaxial restraint was decreased largely for large the unit content of expansive admixture.
(4) The mechanical properties of the expansive concrete depend greatly upon the way of resraining. The triaxial restraint produces a chemical press effect and improves the compressive strength and the Young's modules by 10-30% and 10-20%, respectively. The effect of the degree of restraint on the chemical press is remarkable when the degree of restraint goes to 1%, but the increase in the effect of the chemical press is small if the degree of restraint increases by 5%. The effect of the chemical press became larger as the water-binder ratio became smaller.

  • Research Products

    (12 results)

All Other

All Publications (12 results)

  • [Publications] 神戸 隆幸: "二重鋼管と鋼棒による三軸拘束を受けた膨張コンクリートの膨張エネルギー" コンクリート工学年次論文報告集. 15. 441-446 (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 羽根田 寛: "異なる拘束下に生じる静的破砕剤の膨張エネルギーの評価" コンクリート工学年次論文報告集. 15. 561-566 (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 丸岡 正知: "格子状FRPで補強したCPCはりの曲げ・せん断性状" コンクリート工学年次論文報告集. 15. 1005-1010 (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 辻 幸和: "乾燥収縮を受けたケミカルプレストレストコンクリートはりの曲げ性状" 土木学会コンクリートライブラリー. 75. 147-163 (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Yukikazu Tsuji: "Chemically Prestressed Concrete Beams Reinforced with FRP Rod" Concrete 2000,E&FN Spon. 1727-1738 (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Hiroshi Haneda: "Expansive Energies of Non-Explosive Demolition Agent" Proc.of Demolition and Peuse of Concrete and Masonrg. 255-262 (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Kanbe: "Expansive Energy of Expansive Concrete under the Triaxial Restraint with Double Steel Pipes and Steel Bars" Proc. of JCI. vol.15, No.1. 441-446 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] H.Haneda: "Estimation of Expansive Energy of Non-Explosive Demolition Agent under Restraint" Proc. of JCI. vol.15, No.1. 561-566 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M.Maruoka: "Flexural and Shearing Behaviors of CPC Beam Reinforced with Grid Type FRP" Proc. of JCI. vol.15, No.1. 1005-1010 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Y.Tsuji: "Flexural Behaviors of Chemically Prestressed Concrete Beam after Drying Shrinkage" Concrete Libracy of JSCE. 75. 147-163 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Y.Tsuji: "Chemically Prestressed Concrete Beams Reinforced with FRP Rod" Concrete 2000, E & FN Spon. 1727-1738 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] H.Haneda: "Expansive Energies of Non-Explosive Demolition Agent" Proc. of Demolition and Reuse of Concrete and Masonry. 255-262 (1993)

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

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Published: 1995-03-27  

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