EXPERIMENTAL STUDY ON COMBINED EFFECTS OF FIBER COCKTAIL ON TENSILE PROPERTIES OF HYBRID FIBER REINFORCED CEMENTITIOUS COMPOSITES
ハイブリッド型繊維補強セメント材料の引張性状に及ぼす繊維の複合効果に関する実験的検討
To develop Hybrid Fiber Reinforced Cementitious Composites which is high strength and toughness, it is necessary for appropriate mixture conditions and kinds of fiber to be chosen and for constitution conditions to be clarified. The present study aims to clarify combined effects of fiber cocktail on the tensile properties under uniaxial tensile stress of Hybrid Fiber Reinforced Cementitious Composites using synthetic fibers and steel fibers. With four kinds of steel fiber, experiments were carried out for each to investigate the combined effects of fiber cocktail and influence of the volume content of steel fiber and water-binder ratio. Firstly, it was revealed that toughness can be enhanced by mixing steel fiber and synthetic fiber together as a result of comparison between Hybrid Fiber Reinforced Cementitious Composites and Fiber Reinforced Cementitious Composites in which only single type of steel fiber of around 30mm in length was used. Secondly, the increase of volume content of the steel fiber in Hybrid Fiber Reinforced Cementitious Composites mixed synthetic fiber constantly enhances the tensile strength, though the toughness is not much influenced. Finally, lowering the water-binder ratio from 40％ to 20％ and enhances the matrix strength, the tensile strength of the composites increases while the toughness can be secured at the same level as that of the higher water-binder ratio.本研究は、物性の異なる合成繊維と鋼繊維の2種類の繊維を用いたハイブリッド型繊維補強セメント複合材料（HFRCC）について、一軸引張応力下における引張性状に及ぼす、繊維の複合効果を明らかにするために4種類の鋼繊維を用いて、それぞれ実験的検討を行った。1種類の繊維を混入した繊維補強セメント複合材料との比較から、繊維長30mm程度の鋼繊維を用いた場合には、合成繊維とハイブリッド化することで靭性を高められること、HFRCCの鋼繊維のみの混入率を増加させても、強度は向上するが靭性にはあまり影響がないこと、水結合材比を40％から20％に低くしマトリクス強度を高めると、HFRCCの強度は向上する一方で靭性は同程度を確保できることなどが明らかになった。
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/issn/09163182
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Authors:
- YOSHIDA, Risa
- KIKUTA, Takatsune
- Nishiwaki, Tomoya
- MIHASHI, Hirozo
- Publication Date: 2012
Language
- English
- Japanese
Media Info
- Media Type: Digital/other
- Features: Figures; References; Tables;
- Pagination: pp 552-559
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Serial:
- Cement Science and Concrete Technology
- Volume: 66
- Issue Number: 1
- Publisher: Japan Cement Association
- ISSN: 0916-3182
- EISSN: 2187-3313
- Serial URL: https://www.jstage.jst.go.jp/browse/cement/-char/en
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Publication flags:
Open Access (libre)
Subject/Index Terms
- TRT Terms: Binders; Fiber composites; Mechanical properties; Steel fibers; Synthetic fibers; Tensile properties; Tensile strength; Water cement ratio
- Subject Areas: Highways; Materials; I32: Concrete;
Filing Info
- Accession Number: 01522404
- Record Type: Publication
- Source Agency: Japan Science and Technology Agency (JST)
- Files: TRIS, JSTAGE
- Created Date: Apr 22 2014 4:07PM