Evaluation of effect of short fiber on durability of FRC structures before cracking

• Project/Area Number: 15H04024
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Civil engineering materials/Construction/Construction management
• Research Institution: Gifu University
• Principal Investigator: KUNIEDA Minoru 岐阜大学, 工学部, 教授 (60303509)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Project Status: Completed (Fiscal Year 2017)
• Budget Amount: ¥17,680,000 (Direct Cost: ¥13,600,000、Indirect Cost: ¥4,080,000); Fiscal Year 2017: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2016: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000); Fiscal Year 2015: ¥12,090,000 (Direct Cost: ¥9,300,000、Indirect Cost: ¥2,790,000)
• Keywords: 繊維補強コンクリート / ひび割れ / 耐久性 / 防食 / 繊維分布 / クリープ / 炭素繊維 / 鋼繊維 / 配向性 / 性能改善 / リサイクル炭素繊維

Outline of Final Research Achievements

In this study, following new findings related to the roles of short fiber in FRC before cracking were obtained; 1) nondestructive method to clarify the fiber distribution in the specimen was developed. 2) method to estimate fiber distribution and orientation was proposed. 3) creep behavior of FRC in compression was assessed. 4) corrosion protection function provided by steel fibers for rebar inside of FRC was clarified.

Research Products

• [Int'l Joint Research] ドレスデン工科大学(ドイツ)
• [Journal Article] 統計的手法を用いた繊維補強コンクリートの繊維分布の推定 (2016)
  • Author(s): 井戸翼，国枝稔，大竹雄
  • Journal Title: 日本コンクリート工学会コンクリート工学年次論文集 Volume: 38
  • Peer Reviewed / Acknowledgement Compliant
• [Presentation] 繊維補強コンクリートにおける鉄筋周辺の繊維分布 (2018)
  • Author(s): NGuyen Hoang Long
  • Organizer: 日本材料学会東海支部第12回学術講演会
• [Presentation] 繊維補強コンクリートの鉄筋防食効果 (2018)
  • Author(s): 北川大希
  • Organizer: 日本材料学会東海支部第12回学術講演会
• [Presentation] 炭素繊維または鋼繊維の鉄筋防食効果の評価 (2017)
  • Author(s): 加藤貴裕，國枝稔
  • Organizer: 土木学会第72回年次学術講演会
  • Place of Presentation: 九州大学
  • Year and Date: 2017-09-11
• [Presentation] コア採取による繊維補強コンクリートの繊維分布の評価 (2017)
  • Author(s): 井戸翼，國枝稔
  • Organizer: 土木学会第72回年次学術講演会
  • Place of Presentation: 九州大学
  • Year and Date: 2017-09-11
• [Presentation] ３次元個別要素法による繊維補強モルタル部材中の流動解析 (2017)
  • Author(s): N.H. LONG，國枝稔
  • Organizer: 日本材料学会東海支部第11回学術講演会
  • Place of Presentation: 名古屋大学
• [Presentation] Stochastic Approach to Evaluation of Fiber Distribution in FRC (2016)
  • Author(s): T. Ido
  • Organizer: 9th Rilem International Symposium on Fiber Reinforced Concrete
  • Place of Presentation: バンクーバー
  • Year and Date: 2016-09-19
  • Int'l Joint Research
• [Presentation] リサイクル炭素繊維を用いたモルタルの基礎物性 (2016)
  • Author(s): 加藤貴裕
  • Organizer: 日本材料学会東海支部第10回学術講演会
  • Place of Presentation: 岐阜大学サテライトキャンパス
  • Year and Date: 2016-03-09
• [Presentation] 確率・統計的手法を用いた繊維補強コンクリートの繊維分布の推定 (2016)
  • Author(s): 井戸翼
  • Organizer: 平成27年度土木学会中部支部研究発表会
  • Place of Presentation: 豊田工専
  • Year and Date: 2016-03-04