Updated on 2024/10/18

写真a

 
FUJII Takashi
 
Organization
Faculty of Environmental, Life, Natural Science and Technology Associate Professor
Position
Associate Professor
External link

Degree

  • Doctor (Engineering) ( Okayama University )

  • 修士(環境理工学) ( 岡山大学 )

  • 学士(環境理工学) ( 岡山大学 )

Research Interests

  • Civil engineering

  • Concrete

Research Areas

  • Social Infrastructure (Civil Engineering, Architecture, Disaster Prevention) / Civil engineering material, execution and construction management

Education

  • Okayama University   大学院自然科学研究科   地球・環境システム科学専攻

    2004.4 - 2007.3

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    Country: Japan

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  • Okayama University   大学院自然科学研究科   環境システム学専攻

    2002.4 - 2004.3

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    Country: Japan

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  • Okayama University   環境理工学部   環境デザイン工学科

    1998.4 - 2002.3

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    Country: Japan

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Research History

  • Okayama University   学術研究院環境生命自然科学学域   Associate Professor

    2023.4

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    Country:Japan

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  • Okayama University   学術研究院環境生命自然科学学域   Associate Professor

    2023.4

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    Country:Japan

  • Okayama University   学術研究院環境生命科学学域   Associate Professor

    2021.4 - 2023.3

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    Country:Japan

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  • Okayama University   The Graduate School of Environmental and Life Science   Associate Professor

    2013.4 - 2021.3

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  • Okayama University   The Graduate School of Environmental and Life Science   Assistant Professor

    2012.4 - 2013.3

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  • Okayama University   Graduate School of Environmental Science   Assistant Professor

    2009.4 - 2012.3

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  • Okayama University   Faculty of Environmental Science and Technology

    2008.4 - 2009.3

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  • Okayama University   The Graduate School of Environmental Science

    2007.4 - 2008.3

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Professional Memberships

  • Architectural Institute of Japan

    2022.5

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  • Japan prestressed concrete institute

    2015.5

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  • Japan society of dam engineers

    2008.3

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  • The Society of Materials Science, Japan

    2004.10

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  • Japan concrete institute

    2003.1

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  • Japan society of civil engineers

    2002.4

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Committee Memberships

  • 土木学会   コンクリート委員会/251表面保護工法設計施工指針改訂小委員会委員  

    2024.9   

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    Committee type:Academic society

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  • 日本コンクリート工学会   コンクリート技士研修委員会幹事  

    2023.11 - 2025.10   

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    Committee type:Academic society

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  • 国土交通省中国地方整備局宇野港湾事務所   水島港における効果的な環境修復手法検討委員会  

    2023.10 - 2024.3   

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    Committee type:Government

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  • 日本材料学会   コンクリート構造物の補修,補強,アップグレード論文報告集編集委員会幹事  

    2022.1   

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    Committee type:Academic society

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  • 土木学会   コンクリート委員会養生および混和材料技術に着目したコンクリート構造物の品質・耐久性確保システム研究小委員会(356委員会)委員  

    2021.11 - 2023.11   

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    Committee type:Academic society

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  • 日本コンクリート工学会   コンクリート技士研修委員会委員  

    2021.11 - 2023.10   

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    Committee type:Academic society

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  • 日本コンクリート工学会中国支部   中国地方のコンクリート系建造物の調査研究委員会幹事  

    2021.9   

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    Committee type:Academic society

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  • 日本学術振興会   産学協力委員会「レジリエントインフラのための次世代建設材料の創成」R023委員会委員  

    2020.8   

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    Committee type:Academic society

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  • 土木学会   土木学会論文賞選考委員会幹事  

    2020.8 - 2021.3   

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    Committee type:Academic society

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  • 土木学会   土木学会論文集編集委員会E2分冊編集小委員会幹事  

    2020.6 - 2022.6   

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    Committee type:Academic society

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  • 日本材料学会   次期役員候補者推薦委員会委員  

    2020.4 - 2021.3   

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    Committee type:Academic society

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  • 日本コンクリート工学会中国支部   幹事  

    2019.6   

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    Committee type:Academic society

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  • 土木学会   コンクリート委員会高炉スラグ微粉末を用いたコンクリートの品質・性能評価に関する調査研究小委員会(360委員会)  

    2019.6 - 2021.11   

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    Committee type:Academic society

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  • 土木学会   コンクリート委員会コンクリート構造物の耐凍害性確保に関する調査研究小委員会(359委員会)委員  

    2019.5 - 2021.10   

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    Committee type:Academic society

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  • 日本材料学会   コンクリート構造物の補修,補強,アップグレードシンポジウム実行委員会委員  

    2019.4   

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    Committee type:Academic society

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  • 日本材料学会   代議員  

    2019.4 - 2021.3   

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    Committee type:Academic society

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  • 日本コンクリート工学会   代議員  

    2018.12 - 2020.12   

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    Committee type:Academic society

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  • 国土交通省中国地方整備局中国地方橋梁保全委員会   橋梁保全アドバイザー  

    2018.4   

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    Committee type:Municipal

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  • 日本材料学会   コンクリート構造物の補修,補強,アップグレード論文報告集編集委員会編集委員  

    2018.4 - 2021.1   

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    Committee type:Academic society

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  • 日本材料学会中国支部   幹事会会計幹事  

    2017.11 - 2019.5   

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  • 日本コンクリート工学会   コンクリート工学年次論文集査読委員会委員  

    2017.10 - 2019.6   

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  • 日本コンクリート工学会   コンクリート工学編集委員会委員  

    2017.4 - 2019.3   

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    Committee type:Academic society

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  • 土木学会   コンクリート委員会SIP対応高炉スラグ細骨材を用いたプレキャストコンクリート部材に関する研究小委員会(JSCE262委員会)委員  

    2017.4 - 2019.3   

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    Committee type:Academic society

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  • 日本コンクリート工学会   自然環境下のコンクリート劣化研究委員会委員  

    2016.11 - 2018.9   

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    Committee type:Academic society

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  • 土木学会   複合構造委員会複合構造におけるコンクリートの収縮・クリープの影響に関する研究委員会(H215委員会)委員  

    2016.7 - 2022.9   

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    Committee type:Academic society

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  • 土木学会   コンクリート委員会混和材を大量使用したコンクリート構造物の設計・施工研究小委員会(JSCE264委員会)委員  

    2016.5 - 2018.5   

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    Committee type:Academic society

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  • 土木学会   コンクリート委員会繊維補強コンクリートの構造利用研究小委員会(JSCE346委員会)2期委員  

    2016.5 - 2018.5   

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    Committee type:Academic society

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  • 土木学会中国支部   幹事会幹事  

    2016.5 - 2018.5   

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  • 土木学会   コンクリート委員会コンクリートの性能に及ぼす高温作用の影響評価研究小委員会(JSCE352委員会)委員  

    2016.3 - 2018.1   

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    Committee type:Academic society

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  • 土木学会   コンクリート委員会高炉スラグ細骨材を用いたコンクリートのに関する研究小委員会(JSCE354委員会)委員  

    2016.1 - 2018.1   

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    Committee type:Academic society

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  • 土木学会   コンクリート委員会セメント系構築物と周辺地盤の化学的相互作用研究小委員会(JSCE345委員会)委員  

    2015.9 - 2017.9   

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    Committee type:Academic society

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  • 日本材料学会中国支部   コンクリート構造物の設計,施工,維持管理に関する研究委員会幹事  

    2014.7 - 2016.3   

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    Committee type:Academic society

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  • 日本材料学会中国支部   幹事  

    2014.5   

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  • 土木学会中国支部   平成27年度全国大会実行委員会学術部会年次講演WG副査  

    2014.5 - 2016.3   

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    Committee type:Academic society

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  • 日本コンクリート工学会中国支部   コンクリート構造物の目視点検への情報技術活用調査研究委員会委員  

    2014.1 - 2015.3   

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    Committee type:Academic society

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  • 土木学会   コンクリート委員会セ繊維補強コンクリートの構造利用研究小委員会(JSCE346委員会)(1期)委員  

    2013.11 - 2015.7   

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    Committee type:Academic society

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  • 日本材料学会   コンクリート構造物の補修,補強,アップグレードシンポジウム論文報告集編集委員会委員  

    2013.1 - 2016.10   

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    Committee type:Academic society

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  • 日本材料学会   コンクリート構造物の補修,補強,アップグレードシンポジウム実行委員会委員  

    2013.1 - 2016.10   

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Papers

  • FREEZE-THAW RESISTANCE OF CONCRETE USING GROUND GRANULATED BLAST FURNACE SLAG AND BLAST FURNACE SLAG SAND IN SALT WATER Reviewed

    Toshiki AYANO, Takashi FUJII, Kanako OKAZAKI

    Japanese Journal of JSCE   79 ( 12 )   n/a - n/a   2023.12

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    Authorship:Corresponding author   Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:Japan Society of Civil Engineers  

    DOI: 10.2208/jscejj.23-00042

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  • RESISTANCE TO FREEZING AND THAWING OF STEEL-MAKING SLAG CONCRETE AND THE IMPROVEMENT Reviewed

    Takashi FUJII, Akihiro FUJIKI, Toshiki AYANO, Kenji SAKATA

    SCE JOURNAL OF MATERIALS, CONCRETE STRUCTURES AND PAVEMENTS   63 ( 2 )   262 - 273   2007

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    Steel-making slag concrete consists of by-products at ironworks. The strength of steel-making slag concrete is 20-50 N/mm2 at 28 days. Ground granulated blast furnace slag is used as a binder. Steelmaking slag is used as an aggregate. Steel-making slag concrete doesn't use any natural aggregate, either. The calcium hydroxide leaching from steel-making slag acts as alkali activator of ground granulated blast furnace slag. Steel-making slag concrete can be hardened by itself without any cement. Resistance to carbonation of steel-making slag concrete and resistance to corrosion of steel rod in steel-making slag concrete are high for a long time due to calcium hydroxide leaching from steel-making slag. However, resistance to freezing and thawing of steel-making slag concrete is quite low. In this paper, the mechanism of low resistance to freezing and thawing was clarified. The method to improve the durability of steel-making slag concrete was shown. An entrained air by AE agent is formed by calcium ion. The paste just with ground granulated blast furnace slag cannot contain entrained air by AE agent because enough calcium ions cannot be produced by the hydration with water and ground granulated blast furnace slag. Big size air is formed around steel-making slag because of calcium hydroxide leaching from the steel-making slag. That's why resistance to freezing and thawing is low. In order to improve the resistance to freezing and thawing of steel-making slag concrete, it's necessary to use cement, fly ash and blast furnace slag sand. Cement is used to entrain the air by AE agent. Fly ash is used to consume the extra calcium hydroxide in steel-making slag concrete. Blast furnace slag sand is used to restrain the calcium hydroxide leaching from sand. Then, the resistance to freezing and thawing of steel-making slag concrete is as high as that of AE cement concrete.

    DOI: 10.2208/jsceje.63.262

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  • DRYING SHRINKAGE, AUTOGENEOUS SHRINKAGE, THERMAL STRAIN AND ELASTIC STRAIN OF STEEL-MAKING SLAG CONCRETE Reviewed

    Takashi FUJII, Akihiro FUJIKI, Toshiki AYANO, Kenji SAKATA

    JSCE JOURNAL OF MATERIALS, CONCRETE STRUCTURES AND PAVEMENTS   63 ( 3 )   468 - 484   2007

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    Steel-making slag concrete consists of by-products at ironworks. Steel-making slag concrete is expected as an environmentally friendly concrete. Steel-making slag concrete is used for foot protection block and small marine block, now. The purpose of this study is to enlarge the cover field of steel-making slag concrete productions. In this paper, elastic strain, thermal strain, autogeneous shrinkage strain and drying shrinkage strain of steel-making slag concrete are compared with those of normal cement concrete. Autogeneous shrinkage of steel-making slag concrete is very small due to high water absorption of steel-making slag, even when water to binder ratio of the concrete is quite small. Drying shrinkage strain at ultimate drying time of steel-making slag concrete is much bigger than that of normal cement concrete. Furthermore, drying shrinkage strain of steel-making slag concrete develops at a very low rate. They are due to the effect of high water absorption of steel-making slag. When drying shrinkage strain of steel-making slag concrete is predicted by JSCE model, water content in aggregate must be taken into consideration. On the other hand, Young's modulus, thermal expansion coefficient of steel-making slag concrete is as same as those of normal cement concrete. The effect of type of aggregate on those coefficients is small. As shown in this paper, the deformation of steel-making slag concrete can be predicted in design. It is possible to utilize the steel-making slag concrete in manufacturing of plain concrete structures such as large precast concrete armour unit or concrete block for retaining wall and revetment.

    DOI: 10.2208/jsceje.63.468

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  • Effect of C-S-H Accelerator on Compressive Strength of Concrete Using Blast Furnace Slag Sand Reviewed

    Shang DING, Mitsuru MORIMOTO, Zhonglin TIAN, Takashi FUJII, Toshiki AYANO

    24   77 - 82   2024.10

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  • Effect of Silicate-Based Surface Penetrants to Suppress Scaling Reviewed

    Takashi FUJII, DING Shang, XU Ling, Hisashi ANDO, Toshiki AYANO

    24   391 - 394   2024.10

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  • The Effect of Calcium Silicate Type Accelerator on the Freeze-Thaw Resistance of Concrete Using Blast Furnace Slag Fine Aggregate Reviewed

    Shang DING, Mitsuru MORIMOTO, Takashi FUJII, Toshiki AYANO

    Proceedings of the Japan Concrete Institute   46 ( 1 )   709 - 714   2024.6

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  • Effect of treatment method of construction joint surface on adhesive strength of construction joints Reviewed

    Takashi FUJII, Hisashi ANDO, Isamu YAMAUCHI, Toshiki AYANO

    Proceedings of the Japan Concrete Institute   46 ( 1 )   283 - 288   2024.6

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  • Freeze-thaw Resistance of Concrete using Ground Granulated Blast-furnace Slag and Blast-furnace Slag Sand in Salt Water Reviewed

    Toshiki Ayano, Takashi Fujii, Kanako Okazaki

    Journal of Advanced Concrete Technology   22 ( 5 )   253 - 266   2024.5

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Japan Concrete Institute  

    DOI: 10.3151/jact.22.253

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  • Study on the Effect of Blast Furnace Slag Fine Aggregate and Ground Granulated Blast Furnace Slag on Freeze-thaw Resistance Using Small Pieces of Mortar Reviewed

    Kotaro NOSE, Tetsuo HASHINO, Takashi FUJII, Toshiki AYANO

    Proceedings of the Japan Concrete Institute   45 ( 1 )   568 - 573   2023.6

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    Authorship:Corresponding author   Language:Japanese   Publishing type:Research paper (scientific journal)  

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  • Effect of Coarse Aggregate Quality on Drying Shrinkage Strain of Concrete Reviewed

    Takashi FUJII, DING SHANG, Takashi TANIGUCHI, Toshiki AYANO

    Proceedings of the Japan Concrete Institute   45 ( 1 )   244 - 249   2023.6

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    Authorship:Lead author   Language:Japanese   Publishing type:Research paper (scientific journal)  

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  • Effect of Coarse Aggregate Quality and Fine Particle on Freeze-Thaw Resistance of Concrete Reviewed

    Takashi TANIGUCHI, DING SHANG, Takashi FUJII, Toshiki AYANO

    Proceedings of the Japan Concrete Institute   45 ( 1 )   46 - 51   2023.6

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    Authorship:Corresponding author   Language:Japanese   Publishing type:Research paper (scientific journal)  

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  • Effect of freezing speed and freezing period on freeze-thaw resistance in salt water of mortar Reviewed

    Proceedings of the Japan Concrete Institute   44 ( 1 )   580 - 585   2022.6

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  • Effect of binder and mix proportion on freeze-thaw resistance of concrete with polypropylene short fiber Reviewed

    Proceedings of the Japan Concrete Institute   44 ( 1 )   922 - 927   2022.6

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  • Characteristics of concrete using granulated blast furnace slag sand from different manufacturers. Reviewed

    Proceedings of the Japan Concrete Institute   44 ( 1 )   112 - 117   2022.6

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  • EXPOSURE TEST AND NUMERICAL SIMULATION ON THE INFLUENCE OF OUTDOOR WEATHER ACTION ON THE DRYING SHRINKAGE OF CONCRETE Reviewed

    Keisuke MINOWA, Takumi SHIMOMURA, Yuichiro KAWABATA, Takashi FUJII, Jun TOMIYAMA

    Journal of Japan Society of Civil Engineers, Ser. E2 (Materials and Concrete Structures)   77 ( 4 )   134 - 149   2021.10

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    Publishing type:Research paper (scientific journal)   Publisher:Japan Society of Civil Engineers  

    DOI: 10.2208/jscejmcs.77.4_134

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  • 高炉スラグを用いたコンクリートの物質透過性に関する研究 Reviewed

    藤井隆史, 瀧口響, 能勢幸大郎, 森脇拓也, 綾野克紀

    コンクリート構造物の補修,補強,アップグレード論文報告集   21   115 - 120   2021.10

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  • 最近の試験データを用いた土木学会の収縮ひずみ予測式の適用性に関する検討 Reviewed

    藤井隆史, 下村匠

    コンクリート工学年次論文集   43 ( 1 )   275 - 280   2021.6

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  • けい酸塩系表面含浸材のスケーリング抑制効果に及ぼす施工方法の影響 Reviewed

    森脇拓也, 大西豊, 藤井隆史, 綾野克紀

    コンクリート工学年次論文集   43 ( 1 )   1433 - 1438   2021.6

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  • Improvement of Concrete Properties using Granulated Blast Furnace Slag Sand Invited Reviewed

    Toshiki Ayano, Takashi Fujii

    Journal of Advanced Concrete Technology   19 ( 2 )   118 - 132   2021.2

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    Publishing type:Research paper (scientific journal)   Publisher:Japan Concrete Institute  

    DOI: 10.3151/jact.19.118

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  • 粗骨材がコンクリートの凍結融解抵抗性に与える影響 Reviewed

    藤井隆史, 王亮, 綾野克紀

    コンクリート構造物の補修,補強,アップグレード論文報告集   20   285 - 290   2020.10

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  • セメント種別と養生方法がコンクリートの性能に与える影響 Reviewed

    河中涼一, 藤井隆史, 綾野克紀

    第29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   273 - 278   2020.10

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  • CORROSION INHIBITION EFFECT OF CONCRETE WITH BLAST FURNACE SLAG SAND Reviewed

    Takashi Fujii, Ryoichi Kawanaka, Toshiki Ayano

    Advances in Construction Materials (Proceedings of ConMat'20)   2020.8

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    Authorship:Lead author   Language:English   Publishing type:Research paper (international conference proceedings)  

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  • セメントの種類が蒸気養生を行ったコンクリートの強度および凍結融解抵抗性に与える影響 Reviewed

    王亮, 田中湧磨, 藤井隆史, 綾野克紀

    コンクリート工学年次論文集   42 ( 1 )   701 - 706   2020.6

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  • ポリプロピレン短繊維を添加したコンクリートの凍結融解抵抗性に関する研究 Reviewed

    河中涼一, 田中湧磨, 藤井隆史, 綾野克紀

    コンクリート工学年次論文集   42 ( 1 )   185 - 190   2020.6

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  • 高炉スラグ細骨材を用いたコンクリートの鋼材腐食抑制効果に関する研究 Reviewed

    藤井隆史, 河中涼一, 綾野克紀

    コンクリート構造物の補修,補強,アップグレード論文報告集   19   279 - 284   2019.10

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  • 結合材の種類が高炉スラグ細骨材を用いたコンクリートの性能に与える影響 Reviewed

    田中湧磨, 藤井隆史, 綾野克紀

    コンクリート工学年次論文集   41 ( 1 )   65 - 70   2019.6

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  • 大気中環境下における塩化物イオンの見掛けの拡散係数の設定に関する一考察 Reviewed

    皆川浩, 中村英佑, 藤井隆史, 綾野克紀

    コンクリート工学年次論文集   41 ( 1 )   767 - 772   2019.6

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  • Admixture for Improving Performance of Concrete Using Blast Furnace Slag Sand

    T. Ayano, T. Fujii

    Concrete Journal   57 ( 1 )   83 - 86   2019

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    Publishing type:Research paper (scientific journal)   Publisher:Japan Concrete Institute  

    DOI: 10.3151/coj.57.1_83

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  • 高炉スラグ細骨材を用いたコンクリートの塩分浸透性と鋼材腐食に関する研究 Reviewed

    藤井隆史, 中山敦郎, 綾野克紀

    コンクリート構造物の補修,補強,アップグレード論文報告集   18   25 - 30   2018.10

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  • 高炉スラグ細骨材を用いたコンクリートの強度,収縮,クリープおよびアルカリシリカ反応抑制効果に関する研究 Reviewed

    藤井隆史, 綾野克紀

    コンクリート工学年次論文集   40 ( 1 )   99 - 104   2018.6

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  • DRYING SHRINKAGE STRAIN AND PORE SIZE DISTRIBUTION OF CONCRETE CURED AT HIGH TEMPERATURE Reviewed

    Koki OISHI, Takashi FUJII, Toshiki AYANO

    Cement Science and Concrete Technology (Japan Cement Association)   71   355 - 362   2018

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    Language:Japanese  

    DOI: 10.14250/cement.71.288

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  • Improvement of Durability of Precast Concrete Member by Granulated Blast Furnace Slag Sand (Special Issue on Infrastructure Maintenance, Renovation and Management)

    Journal of disaster research   12 ( 3 )   456 - 469   2017.6

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  • EFFECT OF CURING AND ADMIXTURE ON FREEZE-THAW RESISTANCE OF BFS CONCRETE Reviewed

    Takashi Fujii, Mamoru Yamauchi, Toshiki Ayano

    Proceedings of ICCM2017   Supp_320_22   2017

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  • EFFECT OF GROUND GRANULATED BLAST FURNACE SLAG AND FLY ASH ON RESISTANCE TO FREEZING AND THAWING OF CONCRETE WITH BLAST FURNACE SLAG SLAD Reviewed

    Takashi FUJII, Toshiki AYANO

    Cement Science and Concrete Technology (Japan Cement Association)   70 ( 1 )   355 - 362   2017

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    Language:Japanese   Publisher:Japan Cement Association  

    <p>This paper shows the effect of ground granulated blast furnace slag and fly ash on freeze-thaw resistance of concrete with blast furnace slag sand. When granulated blast furnace slag sand is used as sand, the high resistance to freezing and thawing action can be expected even if AE agent is not used. Concrete with 50% of water to cement ratio keeps over 90% of relative dynamic modulus of elasticity till 300 cycles of freezing and thawing action regardless of period of curing. In the case of using ground granulated blast furnace slag as a part of the binder of the concrete with granulated blast furnace slag sand, by performing sufficient wet curing, the high-resistance to freezing and thawing can be expected same as using just ordinary portland cement. On the other hand, in the case of using a fly ash in a part of the binder of the concrete with granulated blast furnace slag sand, enough resistance to freezing and thawing cannot be obtaining even if cured in water until the age of 91days. In order to exhibit the effect of improving the freeze-thaw resistance by granulated blast furnace slag sand, the selection of a suitable admixture and sufficient wet curing are important.</p>

    DOI: 10.14250/cement.70.355

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  • 高炉スラグ細骨材がコンクリートのフレッシュ性状に及ぼす影響 Reviewed

    浦野真次, 田中博一, 藤井隆史, 綾野克紀

    コンクリート工学年次論文集(日本コンクリート工学会)   39 ( 1 )   1267 - 1272   2017

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  • 高炉スラグ細骨材を用いたコンクリートの凍結融解抵抗性に与える養生方法および増粘剤の影響 Reviewed

    山内守, 野口光明, 藤井隆史, 綾野克紀

    コンクリート工学年次論文集(日本コンクリート工学会)   39 ( 1 )   829 - 834   2017

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  • The effect of granulated blast furnace slag on chloride diffusivity of concrete Reviewed

    Takashi Fujii, Hitoshi Fujiwara, Toshiki Ayano

    ADVANCES IN CONSTRUCTION MATERIALS AND SYSTEMS (Proceedings of an International Conference (ICACMS 2017))   3   361 - 368   2017

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  • Fatigue Life in Water Condition of Concrete with Blast Furnace Slag Sand Subjected to Freeze-Thaw Attack Reviewed

    Toshiki AYANO, Takashi FUJII

    Journal of JSMS   66 ( 8 )   588 - 593   2017

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  • Effect of Blast Furnace Slag on Steel Rod Corrosion in Concrete Reviewed

    Hitoshi FUJIWARA, Atsuro NAKAYAMA, Takashi FUJII, Toshiki AYANO

    Proceedings of the Concrete Structure Scenarios (The Society of Materials Science, Japan)   17   29 - 34   2017

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  • Improvement of Durability of Concrete by Granulated Blast Furnace Slag Sand Reviewed

    Takashi Fujii, Atsuhiko Sugita, Toshiki Ayano

    Proceedings of SCMT4   D164   2016

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  • 5年間実環境に曝露したPC上部工の実物大供試体における乾燥収縮ひずみ Reviewed

    小林仁, 河中涼一, 藤井隆史, 綾野克紀

    第25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   547 - 550   2016

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  • Carbonation, Diffusivity of Chloride Ion and Electric Resistivity of Concrete with Blast Furnace Slag Sand Reviewed

    Takashi FUJII, Mizuki HORI, Hitoshi FUJIWARA, Toshiki AYANO

    Proceedings of the Concrete Structure Scenarios (The Society of Materials Science, Japan)   16   195 - 200   2016

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  • STATIC AND FATIGUE BEHAVIOR OF MORTAR USING BLAST FURNACE SLAG FINE AGGREGATES IN WATER Reviewed

    Muhammad Aboubakar Farooq, Yasuhiko Sato, Toshiki Ayano, Takashi Fuiji

    Proceedings of EASEC-14 (the fourteenth East Asia - Pacific Conference on Structural Engineering and Construction)   1268 - 1273   2016

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  • 高炉スラグ細骨材を用いたコンクリートの凍結融解抵抗性に与える結合材および養生の影響 Reviewed

    杉田篤彦, 白川輝, 藤井隆史, 綾野克紀

    コンクリート工学年次論文集(日本コンクリート工学会)   38 ( 1 )   969 - 974   2016

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  • 高炉スラグ細骨材を用いたコンクリートのスケーリングに与える粒度分布の影響 Reviewed

    山内守, 中溝翔, 藤井隆史, 綾野克紀

    コンクリート工学年次論文集(日本コンクリート工学会)   38 ( 1 )   963 - 968   2016

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  • 高炉スラグ細骨材を用いたコンクリート床版の輪荷重走行疲労試験 Reviewed

    杉田篤彦, 二井谷教治, 綾野克紀, 藤井隆史

    第25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   167 - 172   2016

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  • PRACTICAL APPLICATION OF PRECAST CONCRETE MEMBER WITH SUPER-HIGH DURABILITY CONCRETE Reviewed

    Toshiki Ayano, Takashi Fujii, Katsunori Takahashi, Kyoji Niitani, Kazuyoshi Hosotani

    Proceedings of EASEC-14 (the fourteenth East Asia - Pacific Conference on Structural Engineering and Construction)   338 - 345   2016

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  • Effect of Bleeding to the Freeze-thaw Resistance of Concrete with Blast Furnace Slag Sand Reviewed

    Takashi FUJII, Sho NAKAMIZO, Kazuyoshi HOSOTANI, Toshiki AYANO

    Proceedings of the Concrete Structure Scenarios (The Society of Materials Science, Japan)   15   106 - 104   2015

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  • 緻密化した高炉徐冷スラグ粗骨材を用いたコンクリートの強度および変形特性に関する研究 Reviewed

    白川輝, 藤井隆史, 高橋克則, 綾野克紀

    コンクリート工学年次論文集(日本コンクリート工学会)   37 ( 1 )   79 - 84   2015

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  • 高炉スラグを用いたコンクリートの中性化,塩化物イオン浸透性および時間依存性変形に関する研究 Reviewed

    藤井隆史, 細谷多慶, 杉田篤彦, 綾野克紀

    コンクリート工学年次論文集(日本コンクリート工学会)   37 ( 1 )   637 - 642   2015

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  • RESISTANCE TO FREEZING AND THAWING OF CONCRETE WITH GRANULATE BLAST FURNACE SLAG SAND Reviewed

    Takashi Fujii, Atsuhiko Sugita, Toshiki Ayano

    Proceedings of the Fifth International Conference on Construction Materials (Conmat15)   1331 - 1338   2015

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  • 超高耐久プレストレストコンクリート部材の実験的研究

    杉田篤彦, 二井谷教治, 綾野克紀, 藤井隆史

    第24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   747 - 752   2015

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  • EFFECT OF COPPER COMPOUNDS AND ZINC COMPOUNDS ON SETTING OF MORTAR Reviewed

    Kazumasa UENAKA, Tadashi SAITO, Takashi FUJII, Toshiki AYANO

    Cement Science and Concrete Technology (Japan Cement Association)   68 ( 1 )   164 - 170   2015

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    The drying up of the natural aggregate resources becomes the problem. The slag is an industrial by-product attracts attention as substitute aggregate. Ferro-nickel slag and copper slag are made a standard in Japan Industrial standard(JIS)as concrete aggregate. But the slag is hardly used on the construction site. The slag contains many type heavy metals. There is possibility that heavy metals in the slag retard cement hydration. Therefore, it is necessary to know the effect that heavy metals give on hydration of cement for utilization of slags as concrete aggregate. This paper shows retardation effects of four kinds of copper compounds and four kinds of zinc compounds on setting of mortar. Basic copper carbonate, copper(Ⅰ)oxide, copper(Ⅱ)oxide, copper(Ⅱ)sulfate pentahydrate, zinc oxide, zinc nitrate hexahydrate, basic zinc carbonate and zinc sulfide were used. It was found that setting retardation effect of each compound was different according to the form of the metal salt. Basic copper carbonate had highest effect of setting retardation in four kinds of copper compounds. And zinc oxide had highest effect of setting retardation in four kinds of zinc compounds. In addition, basic copper carbonate and zinc oxide had more high setting retardation effect. In this paper, it was shown that using basic copper carbonate and zinc oxide together caused 20 days delay of setting times of mortar.

    DOI: 10.14250/cement.68.164

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  • FREEZING AND THAWING RESISTANCE OF CONRETE WITH BLAST FURNACE SLAG Reviewed

    53 - 56   2014

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  • Sulfuric Acid Resistance of Concrete with Blast Furnace Slag Fine Aggregate Reviewed

    Paweena Jariyathitipong, Kazuyoshi Hosotani, Takashi Fujii, Toshiki Ayano

    Journal of Civil Engineering and Architecture   8 ( 11 )   1403 - 1413   2014

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  • Effect of sand and binder to chemical resistance of mortar and concrete Reviewed

    T. Fujii, T. Ayano, P. Jariyathitipong, K. Hosotani

    Life-Cycle of Structural Systems: Design, Assessment, Maintenance and Management   1663 - 1670   2014

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  • RESISTANCE TO FREEZING AND THAWING ATTACK OF CONCRETE WITH BLAST FURNACE SLAG FINE AGGREGATE Reviewed

    Toshiki AYANO, Takashi FUJII

    Journal of Japan Society of Civil Engineers, Ser. E2 (Materials and Concrete Structures)   70 ( 4 )   417 - 427   2014

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    Concrete cured by steam can not have high resistance to freezing and thawing attack even if AE agent is added at mixing. However, the concrete with blast furnace slag fine aggregate can have high resistance to freezing and thawing attack even if AE agent is not mixed. That is why the concrete with blast furnace slag fine aggregate can have high resistance to freezing and thawing attack even if it is cured by steam. The calcium hydroxide deposits around the coarse aggregate in ordinary concrete. The calcium hydroxide is easier to dissolve in water at low temperature. The water is accumulated in a gap made by dissolved calcium hydroxide. The accumulated water expands when it freezes and cracks yields around aggregate. In this paper, it is shown that calcium hydroxide does not deposit around the aggregate and the resistance to freezing and thawing of concrete is improved when blast furnace slag is used as fine aggregate.

    DOI: 10.2208/jscejmcs.70.417

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  • EFFECT OF TEMPERATURE HISTORY DURING CURING ON ULTIMATE DRYING SHRINKAGE OF CONCRETE Reviewed

    Toshiki AYANO, Takashi FUJII

    Journal of Japan Society of Civil Engineers, Ser. E2 (Materials and Concrete Structures)   70 ( 4 )   428 - 440   2014

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    The relationship between temperature during curing and the ultimate drying shrinkage of concrete is shown in this paper. The concrete temperature used even in prestressed concrete member tends to increase because the strength of concrete becomes higher and the thickness of member also becomes larger as the span of bridges are getting longer. The effect of temperature due to hydration on concrete drying shrinkage strain is examined in this paper by using the concrete member with the size of actual structure. It is clarified that the ultimate drying shrinkage strain of concrete becomes smaller when the concrete temperature during curing is high. The constitutive equation which expresses the relationship between ultimate drying shrinkage of concrete and constant temperature during curing is proposed. Furthermore, the hardening rule which is used for calculation of ultimate drying shrinkage strain under various temperature history is also proposed in this paper.

    DOI: 10.2208/jscejmcs.70.428

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  • コンクリートの乾燥収縮ひずみに及ぼす養生時の温度履歴の影響 Reviewed

    藤井隆史, 大石幸紀, 沖花智之, 綾野克紀

    コンクリート工学年次論文集(日本コンクリート工学会)   36 ( 1 )   490 - 495   2014

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  • 高炉スラグ細骨材によるコンクリートの凍結融解抵抗性改善に関する研究 Reviewed

    森雅聡, 藤井隆史, Paweena JARIYATHITIPONG, 綾野克紀

    コンクリート工学年次論文集(日本コンクリート工学会)   36 ( 1 )   1078 - 1083   2014

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  • RESISTANCE TO FREEZING AND THAWING ON CONCRETE WITH BLAST FURNACE SLAG UNDER CHLORIDE ATTACK ENVIRONMENT Reviewed

    Paweena JARIYATHITIPONG, Takashi FUJII, Kazuyoshi HOSOTANI, Toshiki AYANO

    Cement Science and Concrete Technology (Japan Cement Association)   67 ( 1 )   427 - 433   2014

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    Language:Japanese   Publisher:Japan Cement Association  

    It has been found that when the steam-curing method is used, even AE concrete with a lower water to cement ratio as 40% cannot provide acceptable resistance to freeze and thaw. In this study, the compressive strength and the freezing and thawing resistance of concrete, containing ground granulated blast furnace slag as a binder and granulated blast furnace slag sand as a fine aggregate, has been investigated. Several mixtures of concrete with different water to binder ratios and ground granulated blast furnace slag to binder ratios, as well as mixtures with and without the AE agent, have been experimented upon. The curing method is also one of the control parameters in this investigation. The results show that the freezing and thawing resistance of concrete can be improved by using granulated blast furnace slag as a part of the binder. Moreover, the freezing and thawing resistance can be improved greatly when granulated blast furnace slag sand is also used as a fine aggregate. Furthermore, not only the freezing and thawing resistance of normal concrete is improved, but the freezing and thawing resistance of non AE agent concrete and steam-curing method concrete is improved as well.

    DOI: 10.14250/cement.67.427

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  • SETTING RETARDATION PROPERTY OF MORTAR USING INORGANIC COMPOUND Reviewed

    Kazumasa UENAKA, Tadashi SAITO, Takashi FUJII, Toshiki AYANO

    Cement Science and Concrete Technology (Japan Cement Association)   67 ( 1 )   203 - 209   2014

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    This study relates to retardation effects of some inorganic compounds on a set of cement mortar. Zinc oxide, Basic zinc carbonate, Copper(Ⅰ)oxide, Copper(Ⅱ)oxide and Basic copper carbonate were used as an inorganic set retarder. Additionally, mixtures of those compounds were tested to examine a combination effect. It was found that retardation effect of zinc compounds was bigger than that of copper compounds. The difference of retardation effect between the zinc compounds was small. And the difference of retardation effect between the copper compounds was also small. Using basic copper oxide and zinc oxide together made the retardation effect bigger than single use of zinc oxide or basic copper carbonate. Particularly, in the case of using a mixture of zinc oxide and basic copper oxide in the ratio of 2:1 by mass, setting of mortar was retarded up to about 10th day. Remixing the mortar shortened the set time, that is to say, decreased the retardation effect. Compressive strength of the mortar at the 28th day was comparable to that of plain mortar. It means those retarders do not affect on the compressive strength at such an age.

    DOI: 10.14250/cement.67.203

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  • 速硬性混和材を用いたコンクリートの生コンクリート工場での実用化に関する研究 Reviewed

    鳴川拓志, 森上廣茂, 寺石文雄, 藤井隆史, 綾野克紀

    第17回(2013年)生コン技術大会研究発表論文集   7 - 12   2013

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  • 有機系混和剤を添加したスラッジ水を用いたモルタルのフレッシュ性状改善効果とその評価方法に関する研究 Reviewed

    斉藤忠, 高田元気, 藤井隆史, 綾野克紀

    コンクリート工学年次論文集(日本コンクリート工学会)   35 ( 1 )   217 - 222   2013

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  • Effect of chemical admixture on property of fresh mortar using sludge water Reviewed

    Takashi Fujii, Tadashi Saito, Toshiki AYANO

    Proceedings of SCMT3   W1-7 3   2013

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  • THE SULFURIC ACID RESISTANCE OF CONCRETE WITH BLAST FURNACE SLAG Reviewed

    Paweena JARIYATHITIPONG, Kazuyoshi HOSOTANI, Takashi FUJII, Toshiki AYANO

    Proceeding of First International Conference on Concrete Sustainability (ICCS13)   581 - 586   2013

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  • EFFECT OF MIX PROPORTIONS AND CURING METHOD ON SULFURIC ACID CORROSION SPEED OF MORTAR Reviewed

    Toshimitsu TANAKA, Takaharu FURUSAWA, Takashi FUJII, Toshiki AYANO

    Cement Science and Concrete Technology (Japan Cement Association)   66   223 - 229   2013

  • CRACKING DUE TO DRYING SHRINKAGE AND DRYING SHRINKAGE ANALYSIS BASED ON DIFFUSION THEORY Reviewed

    Hitoshi KOBAYASHI, Tsutomu SAKIMOTO, Takashi FUJII, Toshiki AYANO, Toyoaki MIYAGAWA

    Journal of Japan Society of Civil Engineers, Ser. E2 (Materials and Concrete Structures)   69 ( 4 )   390 - 401   2013

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    There are a few cases that cracks occurred on PC structures at their young ages. It is judged that cracks were caused by large drying shrinkage of concrete. Drying shrinkage strain develops with the loss of moisture. When drying shrinkage is assumed to be constant at any position of cross section, it is impossible to simulate the crack due to drying shrinkage strain. The reason is that internal stress in concrete is developed by the difference of drying shrinkage between inside and outside of concrete. In order to examine the influence of the internal stress, the moisture distribution in concrete is calculated according to the diffusion equation. The analysis in this study targets to the PC bridge in site. As a result, it will be shown that internal stress of the PC bridge can be simulated and that the effect of drying shrinkage on the crack of the PC bridge can be presumed.

    DOI: 10.2208/jscejmcs.69.390

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  • PREDICTION EQUATION OF DRYING SHRINKAGE STRAIN FOR CONCRETE Reviewed

    Toshiki AYANO, Takashi FUJII, Yoshihiko TAIRA

    Journal of Japan Society of Civil Engineers, Ser. E2 (Materials and Concrete Structures)   69 ( 4 )   421 - 437   2013

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    Publishing type:Research paper (scientific journal)   Publisher:Japan Society of Civil Engineers  

    DOI: 10.2208/jscejmcs.69.421

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  • Strength and Durability of Concrete with Blast Furnace Slag Reviewed

    Paweena JARIYATHITIPONG, Kazuyoshi HOSOTANI, Takashi FUJII, Toshiki AYANO

    Proceedings of SCMT3   T4-6 2   2013

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  • IMPROVEMENT OF RESISTANCE TO SULFURIC ACID ATTACK OF CONCRETE BY USE OF BLAST FURNACE SLAG SAND Reviewed

    Paweena JARIYATHITIPONG, Kazuyoshi HOSOTANI, Takashi FUJII

    Journal of Japan Society of Civil Engineers, Ser. E2 (Materials and Concrete Structures)   69 ( 4 )   337 - 347   2013

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    Publishing type:Research paper (scientific journal)   Publisher:Japan Society of Civil Engineers  

    DOI: 10.2208/jscejmcs.69.337

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  • Effect of Blast Furnace Slag Sand to Durability of Concrete Reviewed

    Takashi FUJII, Paweena JARIYATHITIPONG, Kazuyoshi HOSOTANI, Toshiki AYANO

    Proceedings of the Concrete Structure Scenarios (The Society of Materials Science, Japan)   13   1 - 6   2013

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  • EFFECT OF MEMBER SIZE ON DRYING SHRINKAGE OF CONCRETE Reviewed

    Hitoshi KOBAYASHI, Tsutomu SAKIMOTO, Takashi FUJII, Toshiki AYANO, Toyoaki MIYAGAWA

    Journal of Japan Society of Civil Engineers, Ser. E2 (Materials and Concrete Structures)   69 ( 4 )   377 - 389   2013

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    Drying shrinkage of concrete is a phenomenon caused by moisture distribution of concrete. Moisture distribution of concrete causes because evaporable moisture transfers from inside to outside of concrete through the drying surface. The drying shrinkage near the drying surface is much bigger than that in the center of concrete at arbitrary drying time. However, when the ratio of the length to the thickness of concrete member is high such as a prism test specimen (100×100×400mm) or a bridge girder, the Navier hypothesis is applicable for the deformation due to drying shrinkage and the longitudinal total strain both drying shrinkage and elastic strain is consequently constant at any place in the section.<br> In general, the time-dependent strain due to drying shrinkage can be expressed by the hyperbolic equation. In other words, the time-dependent strain due to drying shrinkage with the lapse of time is expressed by two parameters, that is, the parameter for ultimate drying shrinkage strain and the parameter to express the change of strain by the lapse of time. In this study, the method to predict the drying shrinkage strain in full-scale structures by using drying shrinkage obtained by test according to JIS A 1129 test is proposed. As a result, it is shown that the parameter to express the change of strain by the lapse of time is proportional to the square of the representative member thickness.

    DOI: 10.2208/jscejmcs.69.377

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  • Measurement of drying shrinkage strain with full-scale test specimens for a PC box girder

    Hitoshi Kobayashi, Tsutomu Sakimoto, Takashi Fujii, Toshiki Ayano, Toyo Miyagawa

    fib Symposium TEL-AVIV 2013: Engineering a Concrete Future: Technology, Modeling and Construction, Proceedings   161 - 164   2013

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    Language:English   Publishing type:Research paper (international conference proceedings)   Publisher:lsraeli Association of Construction and lnfrastructure Engineers (IACIE) and Faculty of Civil and Environmental Engineering, Technion - lsrael lnstitute of Technology  

    Recently, cracks in a few prestressed concrete (PC) structures at their early ages have been found in Japan. It was detennined that cracking was caused by large drying shrinkage of the concrete. Therefore, large test specimens whose sizes are the same as a real PC box girder were constructed and the drying shrinkage strain was measured over an extended period of time. This measurement helped explain what had happened in the real structures, and a clue to solve the problem of excessive drying shrinkage strain was obtained. In addition, it is now possible to predict damage to concrete caused by drying shrinkage with the analysis based on the moisture diffusion in concrete.

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  • Effect of chemical admixture to the state of flesh mortar with sludgy water Reviewed

    Takashi FUJII, Tadashi SAITO, Genki TAKADA, Toshiki AYANO

    Proceedings of the Japan Concrete Institute (Japan Concrete Institute)   34 ( 1 )   160 - 165   2012

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  • Effect of steel rod corrosive protection and measures of exfoliation of bottom steel plate on slab with steel plate mold and steel rod Reviewed

    Takaharu FURUSAWA, Hirotugu SANO, Hitoshi FUJIWARA, Takashi FUJII, Toshiki AYANO

    Proceedings of the Concrete Structure Scenarios (The Society of Materials Science, Japan)   12   89 - 94   2012

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  • Making Method and Test Method of Micro Crack Concrete Specimen Reviewed

    Masahiro YAMAMOTO, Naru TANIMURA, Takashi FUJII, Hisashi ANDO, Toshiki AYANO

    Proceedings of the Concrete Structure Scenarios (The Society of Materials Science, Japan)   12   467 - 472   2012

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  • DURABILITY OF CONCRETE WITH LOW-HEAT PORTLAND BLAST FURNACE SLAG CEMENT AND BLAST FURNACE SLAG FINE AGGREGATE Reviewed

    Takashi FUJII, Yasuhiro DAN, Paweena JARIYATHITIPONG, Toshiki AYANO

    Cement Science and Concrete Technology (Japan Cement Association)   65 ( 65 )   413 - 419   2012

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    Language:Japanese   Publisher:Japan Cement Association  

    Low-heat Portland blast furnace slag cement is the cement which raised a ratio of the ground granulated blast furnace slag and reduced the specific surface area of cement by blaine. When Portland blast furnace slag cement is used by binder, the temperature rise of concrete is lower than that of using ordinary Portland cement. In the case that low-heat Portland blast furnace slag cement is used by binder, the temperature rise of concrete is more low that of using Portland blast furnace slag cement which the specific surface area of cement by blaine is high. In the case of using Portland blast-furnace slag cement which raised a ratio of the ground granulated blast furnace slag, compressive strength and carbonation of concrete are worse than that of using ordinary Portland cement. However, sulfuric acid attack resistance is higher than that of using ordinary Portland cement. And in the case of using blast furnace slag sand together, resistance of sulfuric acid attack is more high. In addition, the drying shrinkage strain of concrete with Portland blast furnace slag cement and blast furnace slag sand is smaller than that of using ordinary Portland cement and crushed sand. And in the case that concrete with Portland blast furnace slag cement and blast furnace slag sand cured in stream, the drying shrinkage strain becomes small more.

    DOI: 10.14250/cement.65.413

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  • Effect of Gypsum and Curing to Drying Shrinkage of Concrete with Low-Heat Portland BFS Cement Reviewed

    Takashi FUJII, Yasuhiro DAN, Kazuyoshi HOSOTANI, Toshiki AYANO

    Proceedings of the Japan Concrete Institute (Japan Concrete Institute)   33 ( 1 )   503 - 508   2011

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  • A Study on Influence of Quality of Fly Ash on Characteristics of Fly Ash Concrete Reviewed

    Kazuyuki TAKAHASHI, Tadashi SAITOH, Takashi FUJII, Toshiki AYANO

    Proceedings of the Japan Concrete Institute (Japan Concrete Institute)   33 ( 1 )   965 - 970   2011

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  • CRACK OF RC BEAM WITH STEEL-MAKING SLAG CONCRETE Reviewed

    Yui OZEKI, Takashi FUJII, Hisahiro MATSUNAGA, Toshiki AYANO

    Cement Science and Concrete Technology (Japan Cement Association)   ( 64 )   515 - 521   2011

  • Effect of type of fine aggregate on the resistance of concrete to sulfuric acid attack Reviewed

    T. Ayano, T. Fujii

    Proceedings of the 6th international conference on concrete under severe conditions (consec'10)   2   803 - 811   2010

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  • Rapid test of drying shrinkage strain of concrete Reviewed

    Takashi TANIGUCHI, Jun-ichi WATANABE, Takashi FUJII, Toshiki AYANO

    Proceedings of the Concrete Structure Scenarios (The Society of Materials Science, Japan)   10   249 - 254   2010

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  • PC橋上部工における部材内部の湿度移動に着目した応力解析 Reviewed

    河中涼一, 小林仁, 藤井隆史, 綾野克紀

    第19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   509 - 514   2010

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  • RESISTANCE OF CONCRETE WITH GRANULATED BLAST FURNACE SLAG SAND TO SULPHURIC ACID ATTACK Reviewed

    Toshiki Ayano, Hisahiro Matsunaga, Takashi Fujii

    ADVANCES IN CONCRETE STRUCTURAL DURABILITY: PROCEEDINGS OF THE 2ND INTERNATIONAL CONFERENCE ON DURABILITY OF CONCRETE STRUCTURES ICDCS2010   3   449 - 456   2010

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    Language:English   Publishing type:Research paper (international conference proceedings)   Publisher:HOKKAIDO UNIV PRESS  

    This paper presents that granulated blast furnace slag sand can improve the resistance of concrete to sulphuric acid attack. When a part of cement is replaced with ground granulated blast furnace slag, and granulated blast furnace slag sand is used for sand, resistance of concrete to sulphuric acid attack can be improved more. Because, a coating of gypsum is formed on the mortar or concrete. A coating of gypsum is strong enough to prevent the corrosion by sulphuric acid attack. The relationships between the immersed depth of mortar or concrete by sulphuric acid attack and the product of soaking time and concentration of sulphuric acid are liner. It will show that the resistance to sulphuric acid attack of concrete with granulated blast furnace slag sand is 6 times higher than that of ordinary concrete.

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  • 硫酸環境下におけるコンクリートの耐久性設計に関する研究 Reviewed

    西野隆, 藤井隆史, 細谷多慶, 綾野克紀

    コンクリート工学年次論文集(日本コンクリート工学協会)   32 ( 1 )   659 - 664   2010

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  • 鉄鋼スラグ水和固化体の各種耐久性に関する研究 Reviewed

    松永久宏, 藤井隆史, 綾野克紀

    コンクリート工学年次論文集(日本コンクリート工学協会)   32 ( 1 )   1529 - 1534   2010

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  • 銅スラグのコンクリート用材料への有効利用に関する研究 Reviewed

    渡辺純一, 田村裕美, 藤井隆史, 綾野克紀

    コンクリート工学年次論文集(日本コンクリート工学協会)   32 ( 1 )   1535 - 1540   2010

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  • Durability of concrete with blast furnace slag Reviewed

    Takashi FUJII, Takashi NISHINO, Kazuyoshi HOSOTANI, Toshiki AYANO

    Proceedings of the Concrete Structure Scenarios (The Society of Materials Science, Japan)   9   57 - 62   2009

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  • 高炉水砕スラグを用いたセメント硬化体の耐硫酸性に関する研究 Reviewed

    藤井隆史, 細谷多慶, 松永久宏, 綾野克紀

    コンクリート工学年次論文集   31 ( 1 )   847 - 852   2009

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  • 鉄鋼スラグ水和固化体の強度発現性に及ぼすアルカリ刺激材の影響 Reviewed

    松永久宏, 藤井隆史, 綾野克紀

    コンクリート工学年次論文集   31 ( 1 )   1831 - 1836   2009

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  • RESISTANCE OF CONCRETE WITH GRANULATED BLAST FURNACE SLAG SAND TO SULFURIC ACID ATTACK Reviewed

    Toshiki Ayano, Hisashiro Matsunaga, Takashi Fujii, Kenji Sakata

    Proceedings of ConMat'09 4th International Conference on Construction Materials: Performance, innovations and Structural Implications   2   921 - 926   2009

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  • EFFECT OF TYPE OF FINE AGGREGATE ON THE RESISTANCE OF MORTAR TO SULPHURIC ACID ATTACK Reviewed

    Toshiki AYANO, Takashi FUJII, Kenji SAKATA

    Concrete Durability and Service Life Planning – ConcrtetLife'09 -Proceedings of the 2nd International RILEM Workshop-   213 - 221   2009

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  • APPLICATION OF DISCARDED LIMESTONE POWDER INCLUDING CALCIUM FLUORIDE TO SELF-COMPACTING HIGH PERFORMANCE CONCRETE Reviewed

    Ryo OH, Akihiro TASAKA, Takashi FUJII, Toshiki AYANO

    Cement Science and Concrete Technology   ( 62 )   550 - 556   2009

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  • Solidification Technology for Incineration Ash Using Cement Materials Reviewed

    Kazuyuki Suzuki, Takashi Fujii, Toshiki Ayano, Yoshiro Ono

    Journal of the Japan Society of Material Cycles and Waste Management   20 ( 5 )   320 - 331   2009

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    DOI: 10.3985/jjsmcwm.20.320

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  • Biofouling on Steel Slag Hydrated Matrix in Enclosed Coastal Area Reviewed

    MATSUNAGA Hisahiro, TANISHIKI Kazuho, FUZII Takashi, AYANO Toshiki

    Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering)   65 ( 1 )   1196 - 1200   2009

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    Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:Japan Society of Civil Engineers  

    Biofouling on a steel slag hydrated matrix using steel-making slag as the aggregate and ground granulated blast-furnace slag as the main binder was investigated in enclosed coastal areas, and was compared with that on concrete and a natural rocky shore. The steel slag hydrated matrix tended to display larger microalgal density and diversity than concrete from the initial period at the start of the test, confirming that microalgae readily grow on the steel slag-based material. At a seawall where large-scale works were executed, the biofouling on the steel slag hydrated matrix was equal or superior to that on the natural rocky shore. Based on these results, the steel slag hydrated matrix was judged to be excellent in biofouling performance.

    DOI: 10.2208/kaigan.65.1196

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  • Effect of type of fine aggregate on durability of steel-making slag concrete Reviewed

    Takashi FUJII, Masakazu HARUTA, Toshiki AYANO, Kenji SAKATA

    Proceeding of Japan Concrete Institute   30 ( 2 )   493 - 498   2008

  • Drying shrinkage of steel-making slag concrete

    T Fujii, T Ayano, K Sakata

    Proceeding on 33rd Conference on Our World In Concrete & Structures   179 - 184   2008

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  • Drying shrinkage of recycled concrete Reviewed

    T. Ayano, T. Fujii, K. Sakata

    Creep, shrinkage and durability mechanics of concrete and concrete structures   1   805 - 810   2008

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  • Resistance to sulfuric acid of mortar with blast furnace slag Reviewed

    Takashi FUJII, Makoto KOGOUCHI, Toshiki AYANO, Kenji SAKATA

    Proceedings of the Concrete Structure Scenarios   8   65 - 70   2008

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  • Effect of type of fine aggregate on sulfuric acid attack of mortar Reviewed

    Toshiki AYANO, Makoto KOGOCHI, Takashi FUJII, Keishiro IR

    Proceeding of the Japan Concrete Institute   30 ( 2 )   559 - 564   2008

  • Effect of aluminum hydroxide on control of alkali-aggregate reaction Reviewed

    Akina Ishii, Takashi Fujii, Jun-Ichi Watanabe, Koji Kataoka, Toshiki Ayano

    Zairyo/Journal of the Society of Materials Science, Japan   56 ( 8 )   736 - 741   2007.8

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    Alkali-aggregate reaction (AAR) is one of serious problems of concrete. It is known that fly ash, blast furnace slag, and so on can control the expansion of concrete by AAR. Natural zeolite is known as material that control AAR expansion, too. This paper shows the effect of aluminum hydroxide on control the expansion of concrete by AAR. It is possible to control the expansion of concrete by AAR when aluminum hydroxide to binder ratio is 4.0%. Especially, when a little of fly ash is combined, the effect of aluminum hydroxide is big. But, when aluminum hydroxide is used with much fly ash, the effect of aluminum hydroxide is not clear. The effect of aluminum hydroxide appears when it dissolves in concrete. In this paper, three different type of aggregate were used in order to clarify the effect of aluminum hydroxide on the expansion of concrete by AAR. The effect of aluminum hydroxide on AAR is somewhat different in the type of aggregate. However, it will clarify that aluminum hydroxide is one of an effective admixture to control the expansion of concrete by AAR. By combining aluminum hydroxide with adequate quantity of fly ash, big effect to control the expansion of concrete by AAR can be expected. © 2007 The Society of Materials Science.

    DOI: 10.2472/jsms.56.736

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  • Deformation of steelmaking slag concrete Reviewed

    Jun AKAMOTO, Takashi FUJII, Toshiki AYANO, Kenji SAKATA

    Proceedings of the Japan Concrete Institute   29 ( 2 )   493 - 498   2007

  • Chemical resistance of steelmaking slag concrete Reviewed

    Takashi FUJII, Akihiro FUJIKI, Toshiki AYANO, Kenji SAKATA

    Proceedings of the Japan Concrete Institute   29 ( 2 )   499 - 504   2007

  • Acid resistant repair mortar with electric arc furnace oxidizing slag Reviewed

    Takashi FUJII, Makoto KOGOCHI, Toshiki AYANO, Kenji SAKATA

    Proceeding of Concrete Structure Scenarios, JSMS   7   185 - 190   2007

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  • FREEZING AND THAWING RESISTANCE OF STEEL-MAKING SLAG CONCRETE Reviewed

    Takashi FUJII, Toshiki AYANO, Kenji SAKATA

    Journal of Environmental Science for Sustainable Society   1   1 - 10   2007

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  • Steel making slag concrete as sustainable construction materials Reviewed

    K. Sakata, T. Ayano, T. Fujii

    Proceeding of Special Sessions of Sustainable Construction Materials and Technologies   131 - 141   2007

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  • RESISTANCE TO FREEZING AND THAWING OF STEEL-MAKING SLAG CONCRETE Reviewed

    Toshiki AYANO, Takashi FUJII, Kenji SAKATA

    Proceeding of consec'07 Concrete Under Server Conditions Environment and Loading   717 - 724   2007

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  • DURABILITY IMPROVEMENT OF STEEL-SLAG CONCRETE Reviewed

    Toshiki AYANO, Takashi FUJII, Kenji SAKATA

    Kenji Sakata Symposium on Properties of Concrete   269 - 284   2006

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  • The improvement of resistance to freezing and thawing of steel-making slag concrete Reviewed

    Takashi FUJII, Akihiro FUJIKI, Toshiki AYANO, Kenji SAKATA

    Proceedings of the Japan Concrete Institute   28 ( 1 )   1607 - 1612   2006

  • Effect of Sodium silicate type repair material to adhesive strength of construction joint Reviewed

    Takashi FUJII, Hisashi Ando, Toshiki AYANO, Kenji SAKATA

    Proceedings of the Concrete Structure Scenarios   6   197 - 202   2006

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  • Effect of dosage of pigment on the surface color of concrete Reviewed

    Takashi Fujii, Akihiro Fujiki, Hidekazu Tanaka, Toshiki Ayano

    Zairyo/Journal of the Society of Materials Science, Japan   54 ( 8 )   810 - 815   2005.8

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    Ordinary concrete structures are colorless and monotony. Therefore, they give an artificial and dreary impression. Many approaches for harmonizing concrete with surrounding landscape have been investigated. The coloring concrete is an approach to provide concrete with a favorable impression. The various highlights and contrasts of the scene may enable to readily distinguish elements from one another and to pick those that are most important to us at the moment. The pigment for coloring concrete, whose main component is iron oxide, can give any color without white and blue. The pigment whose main component is chrome oxide makes the color of concrete blue. The pigment whose main component is titanium oxide makes the color of concrete white. Furthermore, carbon black gives black color. When some types of pigment are mixed, the variation of concrete color is expected to be spread much more. In this paper, the effect of the dosage and the type of pigment on the color of concrete is discussed. The method to estimate the lightness and color shade of the color-conditioned concrete is proposed. The proposed method can be also available for the estimation of the color-conditioned concrete with several types of pigments. Normal Portland cement concrete and high volume blast furnace slag cement concrete were used for test.

    DOI: 10.2472/jsms.54.810

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  • Effect of Water Absorption in Steelmaking Slag on Durability of Steel-Slag Hydrated Matrix Reviewed

    Takashi FUJII, Akihiro FUJIKI, Toshiki AYANO, Kenji SAKATA

    Proceedings of the Japan Concrete Institute   27 ( 1 )   1423 - 1428   2005

  • Effect of pH on strength and durability of steel-slag hydrated matrix Reviewed

    T. AYANO, T. Fujii, K. Sakata

    Proceedings ConMat '05   3-5   JPN47_FP   2005

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  • Effect of pH on Strength and Durability of Steel-Slag Hydrated Matrix Reviewed

    Takashi FUJII, Hidekazu TANAKA, Toshiki AYANO, Kenji SAKATA

    Proceedings of Japan Concrete Institute   26 ( 1 )   1653 - 1658   2004

  • Strength and durability of steel-slag hydrated matrix without cement

    Takashi FUJII, Toshiki AYANO, Kenji SAKATA

    Proc. of the 29th Conference on Our World in Concrete & Structures   253 - 258   2004

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  • The Utilization of Discarded Glass for Concrete Material Reviewed

    Takashi FUJII, Hidekazu TANAKA, Toshiki AYANO, Kenji SAKATA

    Cement Science and Concrete technology   ( 57 )   584 - 591   2004

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▼display all

Books

  • 建設材料実験

    日本材料学会( Role: Contributor ,  第6章 フレッシュコンクリート)

    日本材料学会  2024.3  ( ISBN:9784901381598

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    Total pages:3, 277p   Language:Japanese

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  • 高炉スラグ細骨材を用いたプレキャストコンクリート製品の設計・製造・施工指針(案)

    土木学会, 土木学会コンクリート委員会, 土木学会コンクリート委員会SIP対応高炉スラグ細骨材を用いたプレキャストコンクリート部材に関する研究小委員会( Role: Contributor)

    土木学会,丸善出版 (発売)  2019.3  ( ISBN:9784810609622

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    Total pages:5, 310p   Language:Japanese

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  • 高炉スラグ細骨材を用いたコンクリートに関する研究小委員会 (354委員会) 成果報告書

    土木学会, 土木学会コンクリート委員会, 高炉スラグ細骨材を用いたコンクリートに関する研究小委員会 (354委員会)( Role: Contributor)

    土木学会  2018.7  ( ISBN:9784810609738

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    Total pages:141, 49p   Language:Japanese

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MISC

Presentations

  • モルタルの耐凍害性が与える高炉スラグ微粉末の粉末度およびカルシウムシリケート系硬化促進剤の影響

    藤井隆史, 丁上, 森本充, 綾野克紀

    第78回セメント技術大会  2024.5.15 

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    Event date: 2024.5.15 - 2024.5.17

    Language:Japanese   Presentation type:Oral presentation (general)  

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  • けい酸塩系表面含浸材によるひび割れ透水抑制効果に関する研究

    藤井隆史, 安藤尚, 森脇拓也, 綾野克紀

    土木学会全国大会第74回年次学術講演会 

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    Event date: 2020.9.9 - 2020.9.11

    Language:Japanese  

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  • 砕石の品質がコンクリートの乾燥収縮ひずみに与える影響

    藤井 隆史, 臧 洪祥, 瀧口 響, 綾野克紀

    土木学会全国大会第74回年次学術講演会  2021.9.9 

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  • 粗骨材がコンクリートの耐凍害性に与える影響

    藤井隆史, 王亮, 田中湧磨, 綾野克紀

    第73回セメント技術大会  2020.5 

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  • 製造工場の異なる高炉スラグ細骨材を用いたコンクリートの強度および耐久性に関する研究

    藤井隆史, 高橋克則, 綾野克紀

    土木学会全国大会第73回年次学術講演会  2018.8.29 

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  • 高炉スラグ細骨材を用いたコンクリートのフレッシュ性状、強度および凍結融解抵抗性に及ぼす回収水の影響

    藤井隆史, 綾野克紀

    第72回セメント技術大会  2018 

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  • 高炉スラグ細骨材を用いたコンクリートの疲労寿命に凍結融解作用が及ぼす影響

    藤井隆史, 榊原至崇, 綾野克紀

    土木学会全国大会第72回年次学術講演会  2017.9.12 

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  • 薄片供試体を用いたモルタル中の塩化物イオンの見掛けの拡散係数試験方法の検討

    藤井隆史, 堀水紀, 藤原斉, 綾野克紀

    第71回セメント技術大会  2017.5.30 

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  • 結合材の種類が高炉スラグ細骨材を用いたコンクリートの凍結融解抵抗性に与える影響

    土木学会第71回年次学術講演会  2016 

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  • コンクリートのスケーリングに与える高炉スラグ細骨材の粒径の影響

    第70回セメント技術大会  2016 

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  • モルタル小片試験体を用いた細骨材の耐凍害性の評価に関する研究

    第67回土木学会中国支部研究発表会  2015 

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  • 粒度調整による銅スラグの品質改善に関する研究

    第67回土木学会中国支部研究発表会  2015 

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  • モルタル小片試験体を用いた細骨材の耐凍害性の評価に関する研究

    土木学会第70回年次学術講演会  2015 

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  • 粒度調整による銅スラグの品質改善に関する研究

    土木学会第70回年次学術講演会  2015 

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  • 中性化,塩化物イオン浸透性および時間依存性変形に高炉スラグ微粉末および高炉スラグ細骨材が与える影響

    第67回土木学会中国支部研究発表会  2015 

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  • 中性化,塩化物イオン浸透性および時間依存性変形に高炉スラグ微粉末および高炉スラグ細骨材が与える影響

    土木学会第70回年次学術講演会  2015 

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  • 小片供試体を用いたモルタルの凍結融解による劣化機構に関する研究

    第69回セメント技術大会  2015 

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  • 表面が中性化したセメントペーストとけい酸塩系表面含浸材の反応性に関する研究

    第67回土木学会中国支部研究発表会  2015 

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  • 高炉スラグを用いたコンクリートの耐凍害性にブリーディングの及ぼす影響

    第67回土木学会中国支部研究発表会  2015 

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  • 高炉徐冷スラグ粗骨材の品質改善に関する研究

    第66回土木学会中国支部研究発表会  2014 

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  • 高炉スラグ細骨材を用いたコンクリートの凍結融解抵抗性に関する研究

    土木学会第69回年次学術講演会  2014 

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  • 高炉徐冷スラグ粗骨材の品質改善に関する研究

    土木学会第69回年次学術講演会  2014 

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  • 養生中の温度履歴がコンクリートの乾燥収縮ひずみに及ぼす影響

    第66回土木学会中国支部研究発表会  2014 

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  • 高炉スラグ細骨材によるコンクリートの耐凍害性改善に関する研究

    第66回土木学会中国支部研究発表会  2014 

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  • 亜鉛化合物および銅化合物がモルタルの凝結特性に及ぼす影響

    第68回セメント技術大会  2014 

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  • 硫酸侵食を受けたコンクリートの圧縮強度に関する研究

    第68回セメント技術大会  2014 

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  • モルタルの凝結特性に亜鉛化合物および銅化合物が及ぼす影響

    第66回土木学会中国支部研究発表会  2014 

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  • 亜鉛化合物と銅化合物がモルタルの凝結特性に及ぼす影響

    土木学会第69回年次学術講演会  2014 

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  • 養生中の温度履歴がコンクリートの乾燥収縮ひずみに及ぼす影響

    土木学会第69回年次学術講演会  2014 

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  • コンクリートの物性に及ぼす高炉スラグ骨材の種類の影響

    第65回土木学会中国支部研究発表会  2013 

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  • 高炉スラグを用いたコンクリートの耐凍害性に関する研究

    土木学会第68回年次学術講演会  2013 

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  • 高炉スラグがコンクリートの耐凍害性に及ぼす影響

    第65回土木学会中国支部研究発表会  2013 

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  • コンクリートの乾燥収縮ひずみに及ぼす養生時の温度の影響

    第65回土木学会中国支部研究発表会  2013 

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  • スラッジ水を用いたモルタルの化学混和剤による流動性改善とその評価方法に関する研究

    第65回土木学会中国支部研究発表会  2013 

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  • 無機系化学混和剤によるモルタルの凝結遅延に関する研究

    第67回セメント技術大会  2013 

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  • 養生時の温度がコンクリートの乾燥収縮ひずみに及ぼす影響

    土木学会第68回年次学術講演会  2013 

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  • 種々の高炉スラグを細骨材に用いたコンクリートの物性に関する研究

    土木学会第68回年次学術講演会  2013 

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  • スラッジ水を用いたモルタルの化学混和剤による流動性改善効果の評価方法に関する研究

    土木学会第68回年次学術講演会  2013 

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  • モルタルの硫酸侵食速度に及ぼす配合の影響

    第64回土木学会中国支部研究発表会  2012 

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  • 配合および養生方法がモルタルの硫酸侵食速度に及ぼす影響

    第66回セメント技術大会  2012 

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  • 化学混和剤がスラッジ水を用いたモルタルのスランプフローに及ぼす影響

    第64回土木学会中国支部研究発表会  2012 

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  • スラッジ水を用いたモルタルのフレッシュ性状に及ぼす化学混和剤の効果

    土木学会第67回年次学術講演会  2012 

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  • 実構造物における乾燥収縮ひずみの推定

    土木学会第67回年次学術講演会  2012 

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  • スラッジ水を用いたモルタルのフレッシュ性状に及ぼす化学混和剤の効果

    コンクリート工学年次大会2012  2012 

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  • 微細なひび割れを持つコンクリート試験体の作製方法と試験方法

    土木学会第67回年次学術講演会  2012 

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  • Improvement of Resistance of Concrete by Using Granulated Blast Furnace Slag Sand

    BIT’s 2nd Low Carbon Earth Summit-2012  2012 

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  • モルタルの硫酸侵食速度に及ぼす養生の影響

    第64回土木学会中国支部研究発表会  2012 

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  • 養生期間における温度履歴がコンクリートの乾燥収縮ひずみに及ぼす影響

    第64回土木学会中国支部研究発表会  2012 

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  • 低熱高炉セメントを用いたコンクリートの乾燥収縮ひずみに関する研究

    土木学会第66回年次学術講演会  2011 

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  • 硫酸劣化がコンクリートの圧縮強度に及ぼす影響に関する研究

    第63回土木学会中国支部研究発表会  2011 

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  • 養生温度と石こう量が低熱高炉セメントを用いたコンクリートの乾燥収縮に及ぼす影響

    第63回土木学会中国支部研究発表会  2011 

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  • 低熱高炉セメントおよび高炉スラグ細骨材を用いたコンクリートの耐久性

    第65回セメント技術大会  2011 

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  • 凝結遅延剤を用いたスラッジ水の再利用に関する研究

    第63回土木学会中国支部研究発表会  2011 

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  • 鉄筋付鋼製型枠床版の変形挙動に関する研究

    土木学会第66回年次学術講演会  2011 

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  • 鉄筋付鋼製型枠床版の変形挙動に吊り金具の及ぼす影響に関する研究

    第63回土木学会中国支部研究発表会  2011 

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  • PC橋上部工における部材内部の湿度移動に着目した応力解析

    第10回コンクリート構造物の補修,補強,アップグレードシンポジウム  2010 

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  • 鉄鋼スラグ水和固化体を用いたRCはりの収縮ひび割れに関する研究

    第64回セメント技術大会講演会  2010 

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  • コア供試体を用いた乾燥収縮ひずみの早期判定試験に関する研究

    土木学会第65回年次学術講演会  2010 

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  • ポリプロピレン短繊維がコンクリートのじん性に及ぼす影響

    第64回セメント技術大会講演会  2010 

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  • PC橋上部工における部材内部の湿度移動に着目した応力解析

    土木学会第65回年次学術講演会  2010 

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  • 押抜き試験方法によるポリプロピレン短繊維を用いたコンクリートのはく落防止性能評価

    土木学会第65回年次学術講演会  2010 

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  • フッ化カルシウムを含む廃棄石灰石微粉末のコンクリート用材料としての有効利用に関する研究

    第63回セメント技術大会講演会  2009 

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  • 高炉スラグ細骨材を用いたモルタルの耐硫酸性に関する研究

    土木学会第64回年次学術講演会  2009 

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  • 鉄鋼スラグ水和固化体の性能に及ぼす細骨材の種類の影響

    土木学会第63回年次学術講演会  2008 

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  • フッ化カルシウムを含む廃棄石灰石微粉末の自己充填コンクリートへの適用に関する研究

    第62回セメント技術大会講演会  2008 

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  • 電気炉酸化スラグ骨材を用いたコンクリートのフレッシュ性状および耐久性改善

    土木学会第62回年次学術講演会  2007 

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  • 電気炉酸化スラグ骨材を用いた耐酸性モルタルに関する研究

    土木学会第62回年次学術講演会  2007 

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  • 鉄鋼スラグ水和固化体の化学抵抗性に関する研究

    土木学会第62回年次学術講演会  2007 

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Industrial property rights

  • モルタルまたはコンクリート用組成物、それを成形してなる成形品およびモルタルまたはコンクリートの品質確認方法

    綾野克紀, 藤井隆史

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    Applicant:国立大学法人岡山大学

    Application no:特願2017-038809  Date applied:2018.9.20

    Patent/Registration no:特許6262897  Date registered:2017.12.20  Date issued:2018.1.17

    Rights holder:国立大学法人岡山大学

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  • コンクリートの製造方法およびコンクリート疲労強度の評価方法

    綾野克紀, 藤井隆史, 二井谷教治, 俵道和, 杉田篤彦, 細谷多慶

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    Applicant:国立大学法人 岡山大学

    Application no:特願2017-146  Date applied:2017.1.4

    Announcement no:特開2018-108906  Date announced:2018.7.12

    Patent/Registration no:特許6977983  Date registered:2021.11.15  Date issued:2021.12.8

    Rights holder:国立大学法人 岡山大学;オリエンタル白石株式会社;ランデス株式会社

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  • モルタルまたはコンクリート用組成物の製造方法,それを成形してなる成形品の製造方法および品質管理方法

    綾野克紀, 藤井隆史, 細谷多慶, 二井谷教治, 杉田篤彦, 高橋克則, 渡辺圭児

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    Applicant:国立大学法人岡山大学

    Application no:特願2016-161972  Date applied:2016.8.20

    Patent/Registration no:特許6155373  Date registered:2017.6.9  Date issued:2017.6.28

    Rights holder:国立大学法人岡山大学,ランデス株式会社,オリエンタル白石株式会社,JFEスチール株式会社

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  • 耐凍害性を向上したコンクリート用組成物、それを成形してなる成形品、その製造方法および品質管理方法

    綾野克紀, 藤井隆史, 細谷多慶, 大月隆行, 二井谷教治, 杉田篤彦, 高橋克典, 渡辺圭児

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    Applicant:国立大学法人岡山大学

    Application no:特願2015-143297  Date applied:2015.7.17

    Announcement no:特開2017-24930  Date announced:2017.2.2

    Patent/Registration no:特許6726941  Date registered:2020.7.2  Date issued:2020.7.20

    Rights holder:国立大学法人岡山大学,ランデス株式会社,オリエンタル白石株式会社,JFEスチール株式会社

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  • コンクリート用組成物およびそれを成形してなる成形品ならびに床版

    綾野克紀, 藤井隆史, 二井谷教治, 杉田篤彦, 細谷多慶, 大月隆行, 高橋克則, 渡辺圭児

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    Applicant:国立大学法人岡山大学

    Application no:特願2015-101031  Date applied:2015.5.18

    Announcement no:特開2016-216284  Date announced:2016.12.20

    Patent/Registration no:特許6585923  Date registered:2019.9.13  Date issued:2019.10.2

    Rights holder:国立大学法人岡山大学,ランデス株式会社,オリエンタル白石株式会社,JFEスチール株式会社

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  • 高炉スラグ細骨材を用いて耐凍害性を向上したモルタルまたはコンクリート用組成物およびそれを成形してなる成形品ならびに成形品の製造方法

    綾野克紀, 藤井隆史, 細谷多慶

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    Applicant:ランデス株式会社

    Application no:特願2013-213973  Date applied:2013.10.13

    Patent/Registration no:特許6130767  Date registered:2017.4.21  Date issued:2017.5.17

    Rights holder:ランデス株式会社

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  • 鋼製型枠床版

    綾野克紀, 藤井隆史, 佐野洋次, 藤原斉, 古澤貴治

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    Applicant:国立大学法人 岡山大学

    Application no:特願2012-128456  Date applied:2012.6.5

    Announcement no:特開2013-253390  Date announced:2013.12.19

    Patent/Registration no:特許5628242  Date registered:2014.10.10  Date issued:2014.11.19

    Rights holder:国立大学法人 岡山大学,株式会社アイ・テック,但南建設株式会社,西日本高速道路株式会社

    5628242

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  • 硫酸濃度の推定方法および装置

    綾野克紀, 細谷多慶, 藤井隆史

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    Applicant:国立大学法人 岡山大学

    Application no:特願2010-21558  Date applied:2010.2.2

    Announcement no:特開2011-158400  Date announced:2011.8.18

    Patent/Registration no:特許5222311  Date registered:2013.3.15  Date issued:2013.6.26

    Rights holder:ランデス株式会社

    5222311

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  • コンクリートまたはモルタルの維持管理方法および装置

    綾野克紀, 細谷多慶, 藤井隆史

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    Applicant:ランデス株式会社

    Application no:特願2010-21524  Date applied:2010.2.2

    Announcement no:特開2011-158397  Date announced:2011.8.18

    Patent/Registration no:特許5222310  Date registered:2013.3.15  Date issued:2013.6.26

    Rights holder:ランデス株式会社

    5222310

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  • コンクリートまたはモルタルの設計方法および装置

    綾野克紀, 細谷多慶, 藤井隆史

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    Applicant:国立大学法人 岡山大学

    Application no:特願2010-21462  Date applied:2010.2.2

    Announcement no:特開2011-157760  Date announced:2011.8.18

    Patent/Registration no:特許4994467  Date registered:2012.5.18  Date issued:2012.8.8

    Rights holder:ランデス株式会社

    4994467

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  • 廃棄物の処理方法

    綾野克紀, 小野芳朗, 鈴木和将, 藤井隆史

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    Applicant:国立大学法人 岡山大学

    Application no:特願2007-71294  Date applied:2007.3.19

    Announcement no:特開2008-272598  Date announced:2008.11.13

    Patent/Registration no:特許4967131  Date registered:2012.4.13  Date issued:2012.7.4

    Rights holder:国立大学法人 岡山大学

    4967131

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Awards

  • 令和5年度土木学会賞吉田賞論文部門

    2024.5   公益社団法人土木学会   高炉スラグ微粉末および高炉スラグ細骨材を用いたコンクリートの塩水中での凍結融解抵抗性

    綾野 克紀, 藤井 隆史, 岡崎 佳菜子

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  • Yoshida Award, JSCE 2022

    2022.6   Japan Society of Civil Engineers   EXPOSURE TEST AND NUMERICAL SIMULATION ON THE INFLUENCE OF OUTDOOR WEATHER ACTION ON THE DRYING SHRINKAGE OF CONCRETE

    Keisuke MINOWA, Takumi SHIMOMURA, Yuichiro KAWABATA, Takashi FUJII, Jun, TOMIYAMA

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  • 第40回コンクリート工学講演会年次論文奨励賞

    2018.7  

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    Country:Japan

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  • 2017年度セメント協会論文賞

    2017.5  

    藤井隆史 綾野克紀

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    Country:Japan

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  • 平成25年度日本材料学会中国支部学術奨励賞

    2014.5  

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    Country:Japan

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  • 平成20年度土木学会論文賞

    2009.5  

    藤井隆史, 藤木昭宏, 綾野克紀, 阪田憲次

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    Country:Japan

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  • 岡山県仁科賞

    2007.3  

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    Country:Japan

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  • 平成17年度全国大会第60回年次学術講演会優秀講演者

    2005.12  

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    Country:Japan

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Research Projects

  • けい酸塩系表面含浸材のコンクリートのスケーリング抑制効果とそのメカニズムの解明

    2024.05 - 2025.03

    公益財団法人八雲環境科学振興財団  環境研究助成(一般) 

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    Authorship:Principal investigator 

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  • 土砂化に高い抵抗性をもつPC部材の開発

    2024.03 - 2025.02

    東日本高速道路  令和5年度技術研究助成 

    綾野克紀, 藤井隆史

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  • コンクリートの凍結融解抵抗性に与える骨材の影響に関する研究

    2022.04 - 2024.03

    中国建設弘済会  技術開発支援事業助成 

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  • コンクリートの塩分によるスケーリング促進メカニズムの解明とその対策の検討

    2021.04 - 2022.03

    上田記念財団  第12期研究助成金 

    藤井隆史

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  • 高炉スラグ細骨材によるコンクリートの品質改善メカニズムの解明

    2020.11 - 2023.10

    公益財団法人鉄鋼環境基金  環境助成研究  一般研究助成

    綾野克紀, 藤井隆史

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  • コンクリート構造物の予防保全による延命化を目的としたけい酸塩系表面含浸材の開発

    2019.10 - 2021.03

    国土交通省  建設技術研究開発助成制度  政策課題解決型技術開発公募(一般タイプ)

    綾野克紀, 藤井隆史, 安藤尚, 山本昌宏, 谷村成

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  • コンクリートの物質透過性および劣化抵抗性の早期推定手法に関する研究

    Grant number:19K04552  2019.04 - 2023.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)  Grant-in-Aid for Scientific Research (C)

    藤井 隆史

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    Authorship:Principal investigator 

    Grant amount:\4550000 ( Direct expense: \3500000 、 Indirect expense:\1050000 )

    同一バッチで製造されたコンクリートを用いて,JISに規格化されている100×100×400mmの角柱供試体と,Φ75×150mmの円柱供試体を作製し,凍結融解試験を実施した.凍結水には,劣化を促進するために塩水を用いた.凍結融解サイクルは,100×100×400mmの角柱供試体がJIS A 1148「コンクリートの凍結融解試験方法」の規定に従う温度で凍結融解の繰返しを行った.水セメント比が35%の早強ポルトランドセメントを用いた配合のコンクリートを用いた.養生は最高温度が50℃の蒸気養生を行った後,脱型後,気中で養生を行った.凍結融解試験前後の一次共鳴振動数から求めた動弾性係数の比較により,コンクリートの劣化を判定した.その結果,100×100×400mmの角柱供試体で,100サイクル,250サイクルで相対動弾性係数が60%を下回ったコンクリートでは,Φ75×150mmの円柱供試体では,70サイクル,100サイクルで相対動弾性係数が60%を下回った.また,100×100×400mmの角柱供試体で300サイクルの相対動弾性係数が80%のコンクリートでは,Φ75×150mmの円柱供試体では,150サイクル程度で相対動弾性係数が60%を下回った.100×100×400mmの角柱供試体で300サイクルの相対動弾性係数が100%のコンクリートでは,Φ75×150mmの円柱供試体でも,300サイクル程度で相対動弾性係数が100%を保った.供試体寸法を小さくすることで,JISに規格化されている方法よりも,短期間に劣化を促進させることが可能であると思われる.

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  • コンクリート構造物の凍結融解抵抗性に与える骨材および養生の影響に関する研究

    2019.04 - 2020.03

    上田記念財団  第10期研究助成金 

    藤井隆史

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  • 高炉スラグを用いたコンクリートの高耐久化を目指した製造技術に関する研究

    2018.04 - 2019.03

    上田記念財団  第9期研究助成金 

    藤井隆史

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  • 超耐久性コンクリートを用いたプレキャスト部材の製品化のための研究開発

    2014.10 - 2019.03

    独立行政法人新エネルギー・産業技術総合開発機構  SIP(戦略的イノベーション創造プログラム)/インフラ維持管理・更新・マネジメント技術 

    綾野克紀, 藤井隆史, 細谷多慶, 二井谷教治, 高橋克則

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  • コンクリートの硫酸による侵食速度に関する研究

    2013.04 - 2014.03

    セメント協会  セメント協会研究奨励金 

    藤井隆史

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  • コンクリートの乾燥収縮ひずみの早期推定試験方法に関する研究

    2012.04 - 2015.03

    日本学術振興会  科学研究費助成事業  若手研究B

    藤井隆史

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    Authorship:Principal investigator 

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  • コンクリートの乾燥収縮ひずみの早期推定試験方法の確立

    2011.08 - 2012.03

    独立行政法人科学技術振興機構  研究成果展開事業 研究成果展開支援プログラム  フィージビリティスタディ【FS】ステージ 探索タイプ

    藤井隆史

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  • コンクリートの乾燥収縮ひずみひび割れの照査に関する研究

    2011.04 - 2013.03

    中国建設弘済会  技術開発支援事業助成 

    綾野克紀, 藤井隆史

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    Authorship:Coinvestigator(s) 

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  • 高炉スラグを活用した耐硫酸性コンクリートの製造技術に関する研究

    2010.11 - 2012.10

    公益財団法人鉄鋼環境基金  環境助成研究  一般研究助成

    綾野克紀, 藤井隆史

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  • 耐硫酸性水和固化体を用いたプレキャスト部材の製品化

    2009.06 - 2010.03

    独立行政法人新エネルギー・産業技術総合開発機構  大学発事業創出実用化研究開発事業費助成金 

    綾野克紀, 藤井隆史, 河合研至, 川上洵, 細谷多慶

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  • 環境負荷を考慮した構造材料の開発とその設計手法に関する研究

    Grant number:06J52852  2006 - 2007

    日本学術振興会  科学研究費助成事業  特別研究員奨励費

    藤井 隆史

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    Grant amount:\1000000 ( Direct expense: \1000000 )

    鉄鋼スラグ水和固化体は,製鉄の工程で発生する高炉スラグおよび製鋼スラグを主原料に製造される環境負荷の小さい建設材料である。鉄鋼スラグ水和固化体は,産業副産物のみを用い,通常のコンクリートと同程度の20〜50N/mm^2程度の強度発現が可能である。本研究は,環境負荷低減材料として期待される鉄鋼スラグ水和固化体の適用範囲を広げることを目的とするものである。本研究では,鉄鋼スラグ水和固化体とセメントコンクリートとを比較した。その結果,鉄鋼スラグ水和固化体は,結合材に多量の高炉スラグ微粉末を用いるため,通常のセメントコンクリートに比べて,ナトリウムイオンや硫酸イオンに対する抵抗性が高く,セメント量が少ないものは水和熱による熱応力の発生も小さいことを示す。また,多孔質で水酸化カルシウムを溶出する製鋼スラグを骨材に用いるため,水結合材比が小さい配合においても自己収縮ひずみが発生せず,中性化も,天然骨材を用いた場合よりも進行は遅くなることも示した。さらに,弾性係数と圧縮強度の関係および線膨張係数は,セメントコンクリートと同程度であることも示した。しかし,高炉スラグのみを結合材に用いるため,AE剤による気泡がペースト中に分散されないことにより凍結融解抵抗性がAEコンクリートに比べて小さいこと,製鋼スラグが酸に対する抵抗性が小さいため,鉄鋼スラグ水和固化体の酸に対する抵抗性は小さいこと,さらに,吸水率の高い製鋼スラグを骨材に用いるため乾燥収縮ひずみの最終値が大きくなり,また,乾燥収縮ひずみが最終値に達するまで長い時間を要すること等も示した。本研究では,とくに鉄鋼スラグ水和固化体の凍結融解抵抗性の改善方法および鉄鋼スラグ水和固化体の乾燥収縮ひずみの予測手法を示し,リサイクル材料を主原料にした鉄鋼スラグ水和固化体が,一般のコンクリートと同様に建設材料として有効活用される技術を提案した。

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Social Activities

  • 品質管理と検査

    Role(s):Lecturer

    公益社団法人日本コンクリート工学会中国支部  「わかりやすいコンクリート」講習会  2023.12.19

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  • 中国地方におけるコンクリートの凍害と構造物の耐久性向上

    Role(s):Lecturer

    岡山県生コンクリート工業組合  2019年度岡山県生コンクリート工業組合技術研修会  2019.12.5

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  • 5章 配合,6章 製造,7章 施工

    Role(s):Lecturer

    土木学会西部支部  「高炉スラグ細骨材を用いたプレキャストコンクリート製品の設計・製造・施工指針(案)」の発刊に伴う講習会(沖縄会場)  2019.9.17

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  • 社会基盤整備と環境問題

    Role(s):Lecturer

    岡山大学  2019年度岡山大学教員免許状更新講習(選択領域・理科)  2019.8.24

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  • 2章 BFSの品質,3章 BFSコンクリートの品質

    Role(s):Presenter, Lecturer

    岡山大学大学院環境生命科学研究科  「高炉スラグ細骨材を用いたプレキャストコンクリート製品の設計・製造・施工指針(案)」の発刊に伴う講習会(岡山会場)  2019.7.2

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  • 中国地方における凍害事例調査

    Role(s):Lecturer

    日本コンクリート工学会  「自然環境下のコンクリート劣化」に関するシンポジウム─自然環境下のコンクリート劣化研究委員会報告会─(米子会場)  2018.9.21

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  • 高炉スラグ細骨材コンクリートの品質

    Role(s):Lecturer

    土木学会  高炉スラグ細骨材を用いたコンクリートに関する研究小委員会 成果報告会  2018.9.12

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  • 施工編

    Role(s):Presenter, Lecturer

    土木学会中国支部  「2017 年制定コンクリート標準示方書 設計編・施工編」発刊に伴う講習会  2018.9.6

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  • インフラの老巧化とその対策

    Role(s):Lecturer

    岡山大学環境理工学部  岡山大学環境理工学部公開講座  2018.8.26

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  • 高炉スラグ細骨材を用いた コンクリートの耐久性向上

    Role(s):Lecturer

    岡山県生コンクリート工業組合  平成29年度岡山県生コンクリート工業組合技術研修会  2017.12.8

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  • 高炉スラグを用いた プレキャスト部材の長寿命化

    Role(s):Lecturer

    鳥取大学  SIPインフラフォーラム(鳥取県)  2017.12.6

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  • コンクリートの耐久性向上及び最新技術

    Role(s):Lecturer

    岡山県建設技術センター  平成29年度コンクリートの施工技術(初級)研修(2回目)  2017.9.29

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  • 最近のコンクリート技術

    Role(s):Lecturer

    全国土木コンクリートブロック協会  全国土木コンクリートブロック協会平成29年度技術講習会(岡山)  2016.10.20 - 2017.10.19

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  • コンクリートの耐久性向上及び最新技術

    Role(s):Lecturer

    岡山県建設技術センター  コンクリートの施工技術(初級)研修  2012.9.11

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Media Coverage

  • 技術の森 TV or radio program

    山陽放送ラジオ  朝耳らじおGoGo  2021.6.30

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  • 技術の森 TV or radio program

    山陽放送ラジオ  朝耳らじおGoGo  2021.6.23

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