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Investigation on Frost Deterioration of Concrete Using Limestone Coarse Aggregate

Research Project

Project/Area Number 10650552
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Building structures/materials
Research InstitutionHOKKAIDO UNIVERSITY

Principal Investigator

SENBU Osamu  Hokkaido Univ., Grad. School of Eng., Assoc. Pro., 工学研究科, 助教授 (10236127)

Project Period (FY) 1998 – 1999
Project Status Completed (Fiscal Year 1999)
Budget Amount *help
¥2,900,000 (Direct Cost: ¥2,900,000)
Fiscal Year 1999: ¥1,400,000 (Direct Cost: ¥1,400,000)
Fiscal Year 1998: ¥1,500,000 (Direct Cost: ¥1,500,000)
KeywordsLimestone / Coarse Aggregate / Concrete / Frost Deterioration / Thermal Coefficient / Stone Powder / 石灰石粗骨材 / 凍害 / 凍結融解試験 / 熱膨張係数 / 空気量
Research Abstract

Although limestone is characterized by low water absorption and high specific gravity, it is said that frost durability of concrete with the limestone coarse aggregate is lower than concrete with the good coarse aggregates. In this paper, frost durability of concrete with the limestone aggregate is investigated. Results are shown as follows:
(1) According to the investigation of the past experiments, frost durability of concrete was not explained satisfactory by the basic property of coarse aggreegate.
(2) According to the test results of the basic property test of the limestone coarse aggregate, the limestone is characterized by low water absorption, high specific gravity, low thermal coefficient and high content of stone power.
(3) Differences of the thermal coefficient between the coarse aggregate and mortar cause thermal stress, and the low thermal coefficients of limestone cause large thermal stress. It is thought that the thermal stress affects frost deterioration of concrete.
(4) For concrete, an existence of stone powder has effects of reducing air content and improving frost durability.
(5) Freezing and thawing tests varied volume and the surface area of the coarse aggregate was conducted. It is thought that the effect of the thermal stress magnitude on frost durabllity of concrete is small. When the number of the coarse aggregate becomes large, frost durability of concrete becomes small. It is thought that number of cracks affect frost durability of concrete becomes small. It is thought that number of cracks affect frost durability of concrete.

Report

(3 results)
  • 1999 Annual Research Report   Final Research Report Summary
  • 1998 Annual Research Report
  • Research Products

    (7 results)

All Other

All Publications (7 results)

  • [Publications] 袴谷秀行: "石灰岩を粗骨材として用いたコンクリートの耐凍害性に関する基礎的研究"日本建築学会1998年度大会(九州)学術講演梗概集. A-1分冊. 383-384 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] 千歩修: "石灰岩を用いたコンクリート耐凍害性―石粉の影響―"日本建築学会1999年度大会(中国)学術講演梗概集. A-1分冊. 1077-1078 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] HAKAMAYA Hideyuki, SENBU Osamu, KAMADA Eiji: "A Fundamental Study on Frost Durability of Concrete with Limestone As Coarse Aggregate"Summaries of Technical Papers of Annual Meeting. A-1. 383-384 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] SENBU Osamu, KAMADA Eiji: "Frost Durability of Concrete with Limestone Coarse Aggregate ?Influence of Stone Powder-"Summaries of Technical Papers of Annual Meeting. A-1. 1077-1078 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] 袴谷 秀行: "石灰岩を粗骨材として用いたコンクリートの耐凍害性に関する基礎的研究"日本建築学会1998年度大会(九州)学術講演梗概集. A-1分冊. 383-384 (1998)

    • Related Report
      1999 Annual Research Report
  • [Publications] 千歩 修: "石灰岩を用いたコンクリートの耐凍害性 ― 石粉の影響 ―"日本建築学会1998年度大会(中国)学術講演梗概集. A-1分冊. 1077-1078 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] 袴谷 秀幸: "石灰岩を粗骨材として用いたコンクリートの耐凍害性に関する基礎的研究" 日本建築学会1998年度大会学術講演梗梗概集. A-1. 383-384 (1998)

    • Related Report
      1998 Annual Research Report

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Published: 1998-04-01   Modified: 2016-04-21  

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