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Practical Application of Structural Super Lightweight Aggregate Concrete

Research Project

Project/Area Number 11555116
Research Category

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

Allocation TypeSingle-year Grants
Section展開研究
Research Field 土木材料・力学一般
Research InstitutionTOKYO INSTITUTE OF TECHNOLOGY

Principal Investigator

NIWA Junichiro  Tokyo Institute of Technology, Graduate School of Science and Engineering, Professor, 大学院・理工学研究科, 教授 (60164638)

Co-Investigator(Kenkyū-buntansha) HAMADA Yuzuru  DPS Concrete, Technical Research Center, Chief Manager, 技術センター, 主任研究員
OKAMOTO Takahisa  Taiheiyo Cement, Central Research Laboratory, Executive Director, 中央研究所・第二研究部, 部長(研究職)
OTSUKI Nobuaki  Tokyo Institute of Technology, Graduate School of Science and Engineering, Professor, 大学院・理工学研究科, 教授 (40211106)
浜田 譲  ドーピー建設工業, 技術センター, 主任研究員
Project Period (FY) 1999 – 2000
Project Status Completed (Fiscal Year 2000)
Budget Amount *help
¥10,700,000 (Direct Cost: ¥10,700,000)
Fiscal Year 2000: ¥3,400,000 (Direct Cost: ¥3,400,000)
Fiscal Year 1999: ¥7,300,000 (Direct Cost: ¥7,300,000)
KeywordsSuper Lightweight Aggregate / Prestressed Concrete / Fracture Mechanics / Fracture Energy / Shear Resisting Capacity / Size Effect / Composite Structures / Tension Softening Curve / 複合構造形式 / 斜め引張破壊
Research Abstract

Recently, super lightweight artificial aggregates have been developed in Japan. The specific gravity is around 0.8 to 1.2, and the absorption ratio is less than 3.0%. The compressive strength is more than double of conventional artificial aggregates. In this research, the practical application of this structural super lightweight concrete (SLC) has been investigated.
As the first step of this research work, fracture properties of SLC, and shear resisting capacities of reinforced and prestressed SLC beams have been investigated based on the experiments. As the result of this study, the following findings have been obtained. (1) The fracture energy of SLC is much lower than normal aggregate concrete having the same compressive strength level. The shear capacity of SLC beams also shows the same tendency. (2) The increase in the compressive strength of SLC does not provide the significant increase in the fracture energy. (3) To improve the shear resisting capacity, the mix of short fiber, s … More uch as polyvinyl alcohol short fiber, is very effective in the material viewpoint. The use of prestressing is also very effective to improve the shear capacity of SLC beams.
As the second step, two countermeasures have been tried to improve the shear capacity of SLC beams. The first one is the intentional decrease in the compressive strength of SLC beams, and another one is the mixed use of super lightweight aggregates with normal aggregates, such as crushed stone. After the research work, it is confirmed that these two methods are quite effective regardless of the specific gravity of super lightweight aggregates. Finally, for the practical application of SLC, the trial design of SLC composite girders has been carried out. The aesthetic evaluation by using the computer graphics is also performed. From the trial design, SLC composite girders can reduce the dead weight of super structures to almost 50% of the conventional PC girders. SLC can provide the slender and smart concrete structures. Less

Report

(3 results)
  • 2000 Annual Research Report   Final Research Report Summary
  • 1999 Annual Research Report
  • Research Products

    (24 results)

All Other

All Publications (24 results)

  • [Publications] 二羽淳一郎,岡本享久,前堀伸平: "高品質軽量コンクリートの構造部材への適用"コンクリート工学. Vol.38,No.12. 3-9 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] J.Niwa,T.Kawaguchi,S.Maehori,& T.Okamoto: "Shear Capacity of Normal Strength Super Lightweight Concrete Beams"Proceedings of 2^<nd> International Symposium on Structural Lightweight Aggregate Concrete. Vol.1. 299-308 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] 川口哲生,二羽淳一郎,文載欽,前堀伸平: "超軽量人工骨材を使用した普通強度RCはりのせん断耐力"コンクリート工学年次論文集. Vol.22,No.3. 595-600 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] 田村聖,濱田譲,前堀伸平,二羽淳一郎: "高性能軽量コンクリートを用いたPC定着部の耐荷特性"コンクリート工学年次論文集. Vol.22,No.3. 871-876 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] 濱田譲,田村聖,前堀伸平,二羽淳一郎: "高性能軽量コンクリートを用いたPCはりのせん断耐力"プレストレストコンクリート技術協会・第9回シンポジウム論文集. Vol.9. 739-744 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] J.Niwa,S.Tamura,Y.Hamada,T.Okamoto,& Y.Ishikawa: "Ultimate Shear Capacity of Concrete Beams Using High Performance Lightweight Aggregates"Proceedings of the fib Symposium 1999 on Structural Concrete-The Bridge between People (Prague,Czech Republic). Vol.1. 618-619 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] J.Niwa, T.Okamoto, S.Maehori: "Application of Super Lightweight Aggregates to Concrete Structures (in Japanese)"Concrete Journal of the Japan Concrete Institute. Vol.38, No.12. 3-9 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] J.Niwa, T.Kawaguchi, S.Maehori, & T.Okamoto: "Shear Capacity of Normal Strength Super Lightweight Concrete Beams"Proceedings of 2nd International Symposium on Structural Lightweight Aggregate Concrete. Vol.1. 299-308 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] T.Kawaguch, J.Niwa, J.Moon, & S.Maechori: "Shear Capacity of Beams Using Normal Strength Super Lightweight Concrete (in Japanese)"Proceedings of the Japan Concrete Institute. Vol.22, No.3. 595-600 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] S.Tamura, Y.Hamada, S.Maehori, & J.Niwa: "Strength Characteristics at the Anchorage Zone of Prestressed Concrete Structures Using Super Lightweight Concrete"Proceedings of the Japan Concrete Institute. Vol.22, No.3. 871-876 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Y.Hamada, S.Tamura, S.Maehori, & J.Niwa: "Ultimate Shear Capacity of Prestressed Concrete Beams Using High Performance Lightweight Aggregates (in Japanese)"Proceedings of Prestressed Concrete Symposium. Vol.9. 739-744 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] J.Niwa, S.Tamura, Y.Hamada, T.Okamoto, & Y.Ishikawa: "Ultimate Shear Capacity of Concrete Beams Using High Performance Lightweight Aggregates"Proceedings of the fib Symposium 1999 on Structural Concrete-The Bridge between People. Vol.1. 618-623 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] 二羽淳一郎,岡本享久,前堀伸平: "高品質軽量コンクリートの構造部材への適用"コンクリート工学. Vol.38,No.12. 3-9 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] J.Niwa,T.Kawaguchi,S.Maehori,& T.Okamoto: "Shear Capacity of Normal Strength Super Lightweight Concrete Beams"Proceedings of 2^<nd> International Symposium on Structural Lightweight Aggregate Concrete. Vol.1. 299-308 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] 川口哲生,二羽淳一郎,文載欽,前堀伸平: "超軽量人工骨材を使用した普通強度RCはりのせん断耐力"コンクリート工学年次論文集. Vol.22,No.3. 595-600 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] 田村聖,濱田譲,前堀伸平,二羽淳一郎: "高性能軽量コンクリートを用いたPC定着部の耐荷特性"コンクリート工学年次論文集. Vol.22,No.3. 871-876 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] 濱田譲,田村聖,前堀伸平,二羽淳一郎: "高性能軽量コンクリートを用いたPCはりのせん断耐力"プレストレストコンクリート技術協会・第9回シンポジウム論文集. Vol.9. 739-744 (1999)

    • Related Report
      2000 Annual Research Report
  • [Publications] J.Niwa,S.Tamura,Y.Hamada,T. Okamoto,& Y.Ishikawa: "Ultimate Shear Capacity of Concrete Beams Using High Performance Lightweight Aggregates"Proceedings of the fib Symposium 1999 on Structural Concrete-The Bridge between People (Prague,Czech Republic). Vol.1. 618-619 (1999)

    • Related Report
      2000 Annual Research Report
  • [Publications] J.Niwa,Y.Hamada,T.Okamoto 他: "Shear Resistance of PC Beams Using High Performance Lightweight Aggregates"Proc of the 7th East-Asia Pacific Conference on Structural Engineering. 7・2. 1051-1056 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] J.Niwa,Y.Hamada,T.Okamoto 他: "Shear Capacity of Concrete Beams Using High Performance Lightweight Aggregates"Proc of fib Symposium 1999 Structural Concrete (Prague). Vol.1. 241-246 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] T.Okamoto,Y.Hamada,J.Niwa 他: "Mechanical Behavior of High Performance Lightweight Concrete Beams"Proc of Civil and Environmental Engineering Conference (Bangkok). 3・1. III-1-III-8 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] 岡本、浜田、二羽 他: "高性能軽量骨材を用いたプレストレストコンクリートはりのせん断耐荷性状"太平洋セメント研究報告. No.137. 11-16 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] 浜田、二羽 他: "高性能軽量コンクリートを用いたPCはり部材のせん断耐力"第9回プレストレストコンクリートの発展に関するシンポジウム論文集. 9・1. 739-744 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] 岡本 他: "高性能軽量骨材を用いた鉄筋コンクリート柱の曲げせん断性状に関する研究"コンクリート工学年次論文報告集. 21・3. 607-612 (1999)

    • Related Report
      1999 Annual Research Report

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Published: 1999-04-01   Modified: 2016-04-21  

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