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Creep Model of Concrete at Early Ages

Research Project

Project/Area Number 07650528
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 土木材料・力学一般
Research InstitutionNagoya Institute of Technology

Principal Investigator

UMEHARA Hidetaka  Faculty of Engineering, Nagoya Institute of Technology Professor, 工学部, 教授 (70151933)

Co-Investigator(Kenkyū-buntansha) UEHARA Takumi  Faculty of Engineering, Nagoya Institute of Technology Assistant Professor, 工学部, 講師 (60231172)
Project Period (FY) 1995 – 1996
Project Status Completed (Fiscal Year 1996)
Budget Amount *help
¥2,200,000 (Direct Cost: ¥2,200,000)
Fiscal Year 1996: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 1995: ¥1,400,000 (Direct Cost: ¥1,400,000)
Keywordscreep / creep strain / carly aged concrete / rheology model / thermal stress / 若材齡コンクリート / マスコンクリート / 若材齢
Research Abstract

Creep behavior of concrete has been studied by many researchers, but almost all of them are concerned with matured concrete. This study has been conducted for prevention of cracking due to heat of hydration of cement in massive concrete. Compressive and tensile creep experiments have been carried out for early aged concrete such as from 1 day to 5 days. This study was focused on the influence of age of loading, term of loading, and stress level so on. It was noted from compressive creep experiments that specific creep was constant with no influence by stress level below 50% of compressive strength, however, that specific creep significantly increased at over the value. And the influence of stress level and specific creep decreased corresponding to age of loading. On the other hand, it was noted from tensile creep experiments that specific creep was not constant with influence by stress level over 20% of tensile strength.
Furthermore, the method of modeling for change of stress has been investigated based on experimental results and applicability of super-positioning method for such stress has been assessed. it could be pointed out that a presented creep model which was modified Voigt model is applicable for early aged concrete and super-positioning method also could be applied for changing stress such as thermal stress which compressive stress level was below 50% of strength.

Report

(3 results)
  • 1996 Annual Research Report   Final Research Report Summary
  • 1995 Annual Research Report
  • Research Products

    (10 results)

All Other

All Publications (10 results)

  • [Publications] 後藤忠広: "若材齢コンクリートのクリープ挙動に関する研究" コンクリート工学年次論文報告集. 17・1. 1133-1138 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 入矢桂史郎: "若材齢コンクリートのクリープ回復挙動の定式化に関する一考察" 土木学会第51回年次学術講演会講演概要集. 51・V. 818-819 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 平本昌夫: "若材齢コンクリートのクリープを考慮した有効弾性係数の算定" 土木学会第51回年次学術講演会講演概要集. 51・V. 820-821 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Tadahiro Goto: "Studies on Creep Behavior of Early Aged Concrete" Proceedings of the Japan Cencrete Institute. Vol.17-No.1. 1133-1138 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Keishiro Iriya: "Equation of Evaluating Creep Recovery of Early Aged Concrete" Proceedings of the 51th Annual Conference of the Japan Society of Civil Engineers. No.5. 818-819 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Masao Hiramoto: "Effective Modulus of Elasticity Considering Creep Behavior of Early Aged Concrete" Proceedings of the 51th Annual Conference of the Japan Society of Civil Engineers. No.5. 820-821 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 後藤忠広: "若材齡コンクリートのクリープ挙動に関する研究" コンクリート工学年次論文報告集. 17・1. 1113-1138 (1995)

    • Related Report
      1996 Annual Research Report
  • [Publications] 入矢桂史郎: "若材齡コンクリートのクリープ回復挙動の定式化に関する-考察" 土木学会第51回年次学術講演会講演概要集. 51・V. 818-819 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 平本昌生: "若材齡コンクリートのクリープを考慮した有効弾性係数の算定" 土木学会第51回年次学術講演会講演概要集. 51・V. 820-821 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 後藤忠広: "若材齢コンクリートのクリープ挙動に関する研究" コンクリート工学年次論文報告集. 17-1. 1133-1138 (1995)

    • Related Report
      1995 Annual Research Report

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Published: 1995-04-01   Modified: 2016-04-21  

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