Evaluation of Fiber Orientation and Mechanical Properties of Ultra-high Performance Fiber Reinforced Concrete

• Project/Area Number: 15K06164
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Civil engineering materials/Construction/Construction management
• Research Institution: Gifu University
• Principal Investigator: UCHIDA Yuichi 岐阜大学, 工学部, 教授 (20213449)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Project Status: Completed (Fiscal Year 2017)
• Budget Amount: ¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000); Fiscal Year 2017: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2016: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2015: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
• Keywords: 超高強度繊維補強コンクリート / 繊維の配向 / X線CT / 曲げ特性 / 引張軟化特性 / 圧縮特性 / 繊維補強コンクリート / 曲げ破壊特性

Outline of Final Research Achievements

The relationship between fiber orientation and mechanical properties of ultra-high performance fiber reinforced concrete (UHPFRC) was quantitatively evaluated. The post-cracking behavior of the prismatic specimen was assessed with three-point bending tests, and fiber orientation was evaluated using image analysis of fiber orientation based on X-ray CT. The flexural strengths of the specimens indicated perfect linear dependence on the effective number of fibers at the ligament. The tension softening property also depended on the effective number of fibers. The specimen with fibers oriented perpendicular to compression loading axis showed the ductile compression failure behavior.

Research Products

• [Journal Article] 超高強度繊維補強コンクリート中の繊維の配向と引張軟化曲線 (2018)
  • Author(s): 石河義希，伊藤 穂高，内田 裕市
  • Journal Title: コンクリート工学年次論文集 Volume: 40
  • Peer Reviewed
• [Journal Article] Relationship between fiber orientation/distribution and post-cracking behaviour in ultra-high-performance fiber-reinforced concrete (UHPFRC) (2017)
  • Author(s): Bo Zhou and Yuichi Uchida
  • Journal Title: Cement and Concrete Composites Volume: 83 Pages: 66-75
  • DOI: 10.1016/j.cemconcomp.2017.07.007
  • Peer Reviewed
• [Journal Article] Influence of flowability, casting time and formwork geometry on fiber orientation and mechanical properties of UHPFRC (2017)
  • Author(s): B. Zhou and Y. Uchida
  • Journal Title: Cement and Concrete Research Volume: 95 Pages: 164-177
  • DOI: 10.1016/j.cemconres.2017.02.017
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] 超高強度繊維補強コンクリートの流動性が繊維の配向に及ぼす影響 (2016)
  • Author(s): 河村有紀，周波，石河義希，内田裕市
  • Journal Title: コンクリート工学年次論文集 Volume: 38
  • Peer Reviewed
• [Presentation] 超高強度繊維補強コンクリート中の繊維の配向角度が力学挙動に及ぼす影響 (2017)
  • Author(s): 石河義希，伊藤 穂高，内田 裕市
  • Organizer: 土木学会第72回年次学術講演会
• [Presentation] 超高強度繊維補強コンクリート中の繊維の配向と曲げ破壊挙動の関係の検討 (2016)
  • Author(s): 河村有紀，石河義希，周波，内田裕市
  • Organizer: 土木学会第71回年次学術講演会
  • Place of Presentation: 東北大学川内北キャンパス（宮城県仙台市）
  • Year and Date: 2016-09-07
• [Presentation] 繊維補強コンクリート中の繊維の配向に及ぼす流動性の影響 (2016)
  • Author(s): 石河義希，河村有紀，周波，内田裕市
  • Organizer: 土木学会第71回年次学術講演会
  • Place of Presentation: 東北大学川内北キャンパス（宮城県仙台市）
  • Year and Date: 2016-09-07