Updated on 2025/10/18

写真a

 
SUDA Yuya
 
Organization
Academic Assembly Institute of Science and Technology SEISAN DESIGN KOUGAKU KEIRETU Associate Professor
Graduate School of Science and Technology Environmental Science and Technology Associate Professor
Faculty of Engineering Department of Engineering Associate Professor
Title
Associate Professor
External link

Degree

  • Dr. Eng. ( 2013.9   Niigata University )

Research Interests

  • Concrete engineering

  • Civil engineering materials

Research Areas

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

Research History (researchmap)

  • Niigata University   Faculty of Engineering   Associate Professor

    2025.4

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  • University of the Ryukyus   Faculty of Engineering   Associate Professor

    2021.4 - 2025.3

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  • University of the Ryukyus   Faculty of Engineering   Assistant Professor

    2016.10 - 2021.3

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  • Toyota National College of Technology   Civil engineering   Assistant Professor

    2013.11

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  • Toyota National College of Technology   Civil engineering   Research Assistant

    2012.4 - 2013.10

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Research History

  • Niigata University   Environmental Science and Technology, Graduate School of Science and Technology   Associate Professor

    2025.4

  • Niigata University   Department of Engineering, Faculty of Engineering   Associate Professor

    2025.4

  • Niigata University   Institute of Science and Technology, Academic Assembly   Associate Professor

    2025.4

Education

  • Niigata University   Graduate School, Division of Science and Technology   Environmental Sciences

    2008.4 - 2010.3

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  • Niigata University   Faculty of Engineering   Civil Engineering

    2004.4 - 2008.3

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Professional Memberships

Committee Memberships

  • 公益社団法人土木学会   土木学会論文集編集委員会 コンクリート工学編集小委員会(51小委員会)  

    2025.4   

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  • 日本学術振興会   R072持続可能なインフラのための次世代建設材料の創成委員会  

    2025.4   

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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  

    2024.4   

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    Committee type:Academic society

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  • 一般社団法人セメント協会   研究奨励金審査委員会  

    2023.8 - 2025.3   

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    Committee type:Academic society

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  • 日本コンクリート工学会九州支部   学術委員会 学術委員  

    2023.6 - 2025.4   

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  • 土木学会西部支部研究発表会 運営委員会   副委員長  

    2023.4 - 2025.3   

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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大会2023(福岡)実行委員会  

    2022.4 - 2023.8   

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    Committee type:Academic society

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  • 日本コンクリート工学会九州支部   総務委員会 総務委員  

    2021.6 - 2023.6   

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    Committee type:Academic society

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  • セメント協会   セメント・コンクリート論文集編集委員会  

    2021.4 - 2023.3   

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    Committee type:Academic society

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  • 日本コンクリート工学会   コンクリート工学年次論文査読委員会  

    2021.1 - 2022.7   

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    Committee type:Academic society

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  • 日本コンクリート工学会   文献調査委員会  

    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研究委員会   鉄筋コンクリート構造物の複合劣化機構の解明とその対策に関する研究委員会  

    2017.9 - 2019.9   

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  • 土木学会調査研究部門コンクリート委員会   348塩害環境の定量評価に関する研究小委員会  

    2016.4 - 2019.3   

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  • セメント協会   C-S-H研究委員会  

    2015.10 - 2018.3   

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  • 土木学会調査研究部門コンクリート委員会   349コンクリートにおける水の挙動研究小委員会  

    2014.9 - 2017.3   

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  • 土木学会調査研究部門コンクリート委員会   345セメント系構造物と周辺地盤の化学的相互作用研究小委員会  

    2012.4 - 2013.9   

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Papers

  • Mechanisms of change in accelerated carbonation progress in cement paste under different relative humidity conditions

    Luge Cheng, Ryo Kurihara, Takahiro Ohkubo, Ryoma Kitagaki, Atsushi Teramoto, Yuya Suda, Ippei Maruyama

    Cement and Concrete Research   195   107898 - 107898   2025.9

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    Publishing type:Research paper (scientific journal)   Publisher:Elsevier BV  

    DOI: 10.1016/j.cemconres.2025.107898

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  • 異なる相対湿度におけるセメントペーストの炭酸化挙動に及ぼす促進および自然条件の影響に関する研究 Reviewed

    金城雄大, 野中栄太郎, 平良莉久, 須田裕哉

    コンクリート工学年次論文集   47 ( 1 )   2016 - 2021   2025.7

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  • セメントペーストのCO2固定化挙動に及ぼす水セメント比・相対湿度の影響と炭酸化による微細構造変化に関する研究 Reviewed

    須田裕哉, 平良莉久, 野中栄太郎, 金城雄大

    コンクリート工学年次論文集   46 ( 1 )   2010 - 2015   2025.7

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  • Unveiling the Formation Pathway of Vaterite from Amorphous Calcium Carbonate Using Metadynamics Simulations

    Takumi Saito, Ippei Maruyama, Yuya Suda, Atsushi Teramoto, Ryoma Kitagaki, Takahiro Ohkubo

    ACS Omega   2025.5

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.1021/acsomega.5c01115

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  • EFFECT OF DECALCIFICATION AND DECOMPOSITION OF C-S-H ON CARBONATION SHRINKAGE OF HARDENED CEMENT PASTE UNDER DIFFERENT RELATIVE HUMIDITIES Reviewed

    Yuya SUDA, Yuta KINJO, Eitaro NONAKA, Riku TAIRA

    Cement Science and Concrete Technology   78 ( 1 )   119 - 127   2025.3

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    Authorship:Lead author, Corresponding author   Publishing type:Research paper (scientific journal)   Publisher:Japan Cement Association  

    DOI: 10.14250/cement.78.119

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  • CARBONATION PROCESS OF HYDRATION PRODUCTS AND SILICA GEL FORMATION IN HARDENED CEMENT PASTE UNDER DIFFERENT MOISTURE CONDITIONS Reviewed

    Yuya SUDA, Yuta KINJO, Eitaro NONAKA, Riku TAIRA

    Cement Science and Concrete Technology   78 ( 1 )   61 - 69   2025.3

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    Authorship:Lead author, Corresponding author   Publishing type:Research paper (scientific journal)   Publisher:Japan Cement Association  

    DOI: 10.14250/cement.78.61

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  • Semi-dry natural carbonation at different relative humidities: Degree of carbonation and reaction kinetics of calcium hydrates in cement paste

    Naohiko Saeki, Ryo Kurihara, Takahiro Ohkubo, Atsushi Teramoto, Yuya Suda, Ryoma Kitagaki, Ippei Maruyama

    Cement and Concrete Research   189   107777 - 107777   2025.3

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    Publishing type:Research paper (scientific journal)   Publisher:Elsevier BV  

    DOI: 10.1016/j.cemconres.2024.107777

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  • Plugging effect of fine pore water in OPC and LC3 paste during accelerated carbonation monitored via single-sided nuclear magnetic resonance spectroscopy Reviewed

    Luge Cheng, Ryo Kurihara, Takahiro Ohkubo, Ryoma Kitagaki, Atsushi Teramoto, Yuya Suda, Ippei Maruyama

    Cement and Concrete Research   186   107688 - 107688   2024.12

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    Publishing type:Research paper (scientific journal)   Publisher:Elsevier BV  

    DOI: 10.1016/j.cemconres.2024.107688

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  • Understanding the Carbonation Phenomenon of C–S–H through Layer Structure Changes and Water Exchange Reviewed

    Taiki Uno, Naohiko Saeki, Ippei Maruyama, Yuya Suda, Atsushi Teramoto, Ryoma Kitagaki, Takahiro Ohkubo

    The Journal of Physical Chemistry C   128 ( 28 )   11802 - 11816   2024.7

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    Publishing type:Research paper (scientific journal)   Publisher:American Chemical Society (ACS)  

    DOI: 10.1021/acs.jpcc.4c01714

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  • 異なる炭酸化条件におけるセメントペーストの酸素の拡散性状および空隙構造に関する検討 Reviewed

    平良莉久, 野中栄太郎, 金城雄大, 須田裕哉

    コンクリート工学年次論文集   46 ( 1 )   361 - 366   2024.6

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  • セメントペーストの炭酸化進行における水和物および炭酸塩鉱物の生成に及ぼす温度の影響に関する基礎的研究 Reviewed

    野中栄太郎, 金城雄大, 平良莉久, 須田裕哉

    コンクリート工学年次論文集   46 ( 1 )   583 - 588   2024.6

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  • セメントペーストの炭酸化における相対湿度および水セメント比の影響に関する基礎的検討 Reviewed

    金城雄大, 野中栄太郎, 平良莉久, 須田裕哉

    コンクリート工学年次論文集   46 ( 1 )   577 - 582   2024.6

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  • FUNDAMENTAL STUDY ON CARBONATION PROGRESS WITH TYPE C BLAST FURNACE SLAG CEMENT DUE TO SHRINKAGE REDUCING Reviewed

    Yuya SUDA, Kentaro ISHISOKO, Jun TOMIYAMA

    Cement Science and Concrete Technology   77 ( 1 )   213 - 221   2024.3

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    Authorship:Lead author, Corresponding author   Publishing type:Research paper (scientific journal)   Publisher:Japan Cement Association  

    DOI: 10.14250/cement.77.213

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  • Natural carbonation process in cement paste particles in different relative humidities Reviewed

    Naohiko Saeki, Luge Cheng, Ryo Kurihara, Takahiro Ohkubo, Atsushi Teramoto, Yuya Suda, Ryoma Kitagaki, Ippei Maruyama

    Cement and Concrete Composites   146   105400 - 105400   2024.2

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    Publishing type:Research paper (scientific journal)   Publisher:Elsevier BV  

    DOI: 10.1016/j.cemconcomp.2023.105400

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  • Durability Properties of Ambient Cured Geopolymer Mortar Made from Rice Husk Ash–Based Alkali Activator: A Comparative Study with Conventional Alkali Activator Reviewed

    Shaswat Kumar Das, Manoj Kumar Nayak, Sanjaya Kumar Patro, Yuya Suda

    Advances in Civil Engineering Materials   12 ( 1 )   314 - 328   2023.12

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    Publishing type:Research paper (scientific journal)   Publisher:ASTM International  

    Abstract

    Geopolymers/alkali-activated materials (AAMs) are widely regarded as ecofriendly and durable alternatives to portland-based cement concrete. However, commercial alkali activators, especially the sodium silicate used to manufacture geopolymers/AAMs, are associated with a significant amount of carbon emission during their production. In this study, the feasibility of using rice husk ash (RHA) as a source for an alternative sustainable alkali activator has been explored at ambient temperature curing, and the durability properties of the geopolymer mortars (GPM) has been investigated. Three different concentrations of sodium hydroxide (SH), i.e., 20, 24, and 27 wt. % solutions, have been taken for the synthesis of RHA alkali activator used in synthesis of GPM, and another GPM with conventional alkali activator has also been synthesized for comparative study. Durability studies such as water absorption, sorptivity, sulfate resistance, and acid resistance were evaluated extensively in terms of change in weight and compressive strength. The experimental results revealed that the GPM made with 24 wt. % SH-RHA–based activator solution (R24) has optimal performance considering all the durability parameters and has a close correlation to the results obtained for the control GPM made with conventional alkali activator (C24). The microstructural studies further revealed that the gel structure of the R24 is compact and homogeneous, similar to that of C24; however, the former has a N-A-S-H–dominated gel matrix and the latter consists of N-(C)-A-S-H–type gels.

    DOI: 10.1520/acem20230069

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  • Error Factors in Quantifying Inorganic Carbonate CO2 in Concrete Materials Reviewed

    Haruka Takahashi, Ippei Maruyama, Takahiro Ohkubo, Ryoma Kitagaki, Yuya Suda, Atsushi Teramoto, Kazuko Haga, Takahiro Nagase

    Journal of Advanced Concrete Technology   21 ( 10 )   789 - 802   2023.10

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

    DOI: 10.3151/jact.21.789

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  • Effectiveness of rice husk ash-derived alkali activator in fresh, mechanical, and microstructure properties of geopolymer mortar at ambient temperature curing Reviewed

    Shaswat Kumar Das, Niranjan Behera, Sanjaya Kumar Patro, Syed Mohammed Mustakim, Yuya Suda, Nordine Leklou

    Journal of Sustainable Cement-Based Materials   13 ( 2 )   213 - 221   2023.10

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    Publishing type:Research paper (scientific journal)   Publisher:Informa UK Limited  

    DOI: 10.1080/21650373.2023.2262465

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  • 遅延膨張性骨材を使用したコンクリートの内部構造観察によるASR と塩害の複合劣化の損傷評価 Reviewed

    屋嘉俊也, 須田裕哉, 富山潤, 比屋根方新

    コンクリート工学年次論文集   45 ( 1 )   634 - 639   2023.7

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  • 機械学習によるコンクリート構造物の塩害劣化予測に関する研究 Reviewed

    吉見映輝, 富山潤, 須田裕哉

    コンクリート工学年次論文集   44 ( 1 )   478 - 483   2022.7

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

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  • 遅延膨張性骨材を用いたASR発生コンクリートの塩分浸透・鉄筋腐食性状の評価 Reviewed

    坪井星那, 須田裕哉, 富山潤, 比屋根方新

    コンクリート工学年次論文集   44 ( 1 )   634 - 639   2022.7

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  • バイオマス発電所から排出されるPKS燃焼灰を用いたモルタルの耐久性評価に関する基礎的検討 Reviewed

    金城雄大, 須田裕哉, 富山潤, 南出拓人

    コンクリート工学年次論文集   44 ( 1 )   1660 - 1665   2022.7

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

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  • 炭酸化時の湿度条件がセメントペーストの微細構造に及ぼす影響 Reviewed

    須田裕哉, 稲福亮, 富山潤

    コンクリート工学年次論文集   44 ( 1 )   448 - 453   2022.7

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

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  • Horizontal end crack control and load-bearing capacity performance of hollow-type pretensioned girders through experimentally calibrated finite element models Reviewed

    Bashir Ahmad Aasim, Abdul Khaliq Karimi, Jun Tomiyama, Yuya Suda

    Engineering Science and Technology, an International Journal   24 ( 5 )   1262 - 1271   2021.10

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.jestch.2021.02.007

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  • Phase assemblage, microstructure and shrinkage of cement paste during carbonation at different relative humidities Reviewed

    Yuya Suda, Jun Tomiyama, Tsuyoshi Saito, Tatsuhiko Saeki

    Journal of Advanced Concrete Technology   19 ( 6 )   687 - 699   2021

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    Authorship:Lead author, Corresponding author   Publishing type:Research paper (scientific journal)  

    DOI: 10.3151/jact.19.687

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  • Experimental and numerical studies on the control of horizontal cracking at the ends of hollow-type pretensioned girders Reviewed

    Abdul Khaliq Karimi, Bashir Ahmad Aasim, Jun Tomiyama, Yuya Suda, Ömer Aydan, Kazuo Kaneda

    SN Applied Sciences   2 ( 10 )   2020.10

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.1007/s42452-020-03461-z

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  • Impact of relative humidity on carbonation shrinkage and microstructure of hardened cement paste Reviewed

    Yuya Suda, Jun Tomiyama, Tsuyoshi Saito, Tatsuhiko Saeki

    6th International Conference on Construction Materials (ConMat'20)   2020.8

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  • 高炉スラグ微粉末を用いたセメントペーストの炭酸化による気体の拡散性状の変化と相組成および空隙構造との関係 Reviewed

    須田裕哉, 安藤大晃, 立原知実, 富山潤

    コンクリート工学年次論文集   42 ( 1 )   125 - 130   2020.7

  • Salt damage Simulation for Deterioration Prediction on each Part and Member of Concrete Bridge Superstructure Reviewed

    19   617 - 622   2019.10

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    Language:Japanese  

    CiNii Article

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  • EXAMINATION OF CRACK INSPECTION ON BRIDGES LEADING TO REMOTE ISLANDS USING UAV DIGITAL IMAGE ANALYSIS TECHNOLOGY Reviewed

    TOMIYAMA Jun, SUDA Yuya, SAKIHARA Kohei, YAMADA Yoshitomo, HORIGUCHI Kenichi, OKABE Naruyuki

    Journal of Japan Society of Civil Engineers, Ser. F4 (Construction and Management)   75 ( 1 )   11 - 23   2019

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    Language:Japanese   Publisher:Japan Society of Civil Engineers  

    <p> The University of the Ryukyus conducted an empirical experiment on new crack image analysis technology (T Corporation) which is one of the development technologies of the Cross-ministerial Strategic Innovation Promotion Program (SIP) infrastructure maintenance, renovation and management technology to concrete bridges of remote island with many restrictions on inspection, and obtained results were good agreement with visual inspection results.</p><p> The result was evaluated by the bridge manager, and this technology was used for the part of the inspection service of a concrete bridge. The approach in the University of the Ryukyus for the empirical experiment of this technology is one implementation model which led the new technology to the regional implementation.</p><p> In this paper, the background and the consideration of success factors that led to the regional implementation of this technology from the empirical experiment are shown. Moreover, cost merit, efficiency and sophistication of this technology are examined.</p><p> Also, new 3D visualization technology for crack analysis was developed through the regional implementation.</p>

    DOI: 10.2208/jscejcm.75.11

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  • 自然環境下におけるセメント硬化体の変質と酸素および塩化物イオンの拡散性状に関する研究 Reviewed

    須田裕哉, 長嶺剛, 富山潤

    コンクリート工学年次論文集   41 ( 1 )   593 - 598   2019

  • セメント硬化体の炭酸化収縮と水和物に及ぼす相対湿度の影響 Reviewed

    須田裕哉, 富山潤, 斎藤豪, 佐伯竜彦

    セメントコンクリート論文集   73   71 - 78   2019

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  • ひび割れ画像と均質化法を用いたASRに起因した材料劣化推定に関する基礎研究 Reviewed

    富山潤, 古田泰祐, 須田裕哉, 堀口賢一

    コンクリート工学年次論文集   41 ( 2 )   1429 - 1434   2019

  • 湿度変化による乾燥作用を受けたセメントペーストの空隙構造と塩化物イオンの拡散性状の関係に関する基礎的検討 Reviewed

    須田裕哉, 富山潤, 斎藤豪, 佐伯竜彦

    コンクリート工学年次論文集   Vol. 40 ( No.1 )   pp. 747-752   2018

  • 乾燥を受けた高炉セメント硬化体の気体の移動性状とミクロ,メソ,マクロの空隙構 造の関係に関する研究 Reviewed

    須田裕哉, 河野伊知郎, 斎藤豪, 佐伯竜彦

    コンクリート工学年次論文集   Vol. 39 ( No.1 )   pp. 469-474   2017

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  • 早強セメントをベースセメントとし温度履歴を与えた フライアッシュセメント硬化体の相組成と強度発現性状 Reviewed

    佐伯竜彦, 石川嘉崇, 須田裕哉

    セメント・コンクリート論文集   Vol. 71   pp. 169-176   2017

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  • 乾燥を受けたセメント硬化体の気体の移動性状に対する空隙構造と水和物による評価 Reviewed

    須田裕哉, 河野伊知郎, 斎藤豪, 佐伯竜彦

    セメント・コンクリート論文集   Vol. 71   pp. 210-217   2017

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  • セメント硬化体の水蒸気吸着等温線で生じる低圧部のヒステリシスとスキャニングループに関する基礎的検討 Reviewed

    須田裕哉, 河野伊知郎, 斎藤豪, 佐伯竜彦

    セメント・コンクリート論文集   Vol. 70   pp. 154-161   2016

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  • 高炉スラグ微粉末を用いたセメント硬化体の酸素の拡散性状に及ぼす乾燥湿度の影響 Reviewed

    須田裕哉, 河野伊知郎, 斎藤豪, 佐伯竜彦

    コンクリート工学年次論文集   Vol. 38 ( No.1 )   pp. 633-638   2016

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  • Relation between Chemical Composition and Physical Properties of C-S-H Generated from Cementitious Materials Reviewed

    Yuya Suda, Tatsuhiko Saeki, Tsuyoshi Saito

    JOURNAL OF ADVANCED CONCRETE TECHNOLOGY   13 ( 5 )   275 - 290   2015.5

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.3151/jact.13.275

    Web of Science

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  • C-S-Hの組成と比表面積の関係に及ぼすAl置換の影響に関する研究 Reviewed

    須田裕哉, 河野伊知郎, 斎藤豪, 佐伯竜彦

    セメント・コンクリート論文集   Vol. 69   pp. 37-44   2015

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  • 6号砕石ポーラスコンクリートの全空隙率- 調合空隙率関係と圧縮・曲げ強度の変動係数 Reviewed

    山本貴正, 河野伊知郎, 須田裕哉

    コンクリート工学年次論文集   Vol. 37 ( No.1 )   pp. 1327-1332   2015

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  • C-S-Hの組成がゲル空隙の量およびゲル空隙の空隙径分布に及ぼす影響 Reviewed

    須田裕哉, 斎藤豪, 佐伯竜彦

    土木学会論文集E2   Vol. 70 ( No.2 )   pp. 134-152   2014

  • 温度履歴を与えたフライアッシュセメント硬化体の相組成と強度発現性状に関する基礎的検討 Reviewed

    須田裕哉, 菊地道生, 佐伯竜彦, 鷲尾朝昭

    セメント・コンクリート論文集   Vol. 68   pp. 156-163   2014

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  • Oxygen and chloride ion diffusion in concrete using silica fume, blast furnace slag and fly ash

    Tatsuhiko Saeki, Michio Kikuchi, Yuya Suda, Tsuyoshi Saito

    Sustainable Construction Materials and Technologies   2013-August   2013

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    Scopus

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  • THE INFLUENCE OF TEMPERATURE AND HUMIDITY ON COMPOSITION AND DENSITY OF C-S-H Reviewed

    SUDA Yuya, SAEKI Tatsuhiko, SAITO Tsuyoshi

    Cement Science and Concrete Technology   Vol. 67 ( 1 )   pp. 157-164 - 164   2013

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    Language:Japanese   Publisher:Japan Cement Association  

    The performances of concrete are influenced by the microstructure of hardened cement paste. The microstructure of hardened cement paste is affected by the hydration products. Therefore, in order to evaluate the characteristics of the microstructure of hardened cement paste, the physical properties of hydration product should be clarified accuracy.<br/> The purpose of this study is to evaluate the influence of each relative humidity and temperature on the chemical composition and density of C-S-H. The composition(C/S ratio, the H/S ratio) and the density of C-S-H at each relative humidity and temperature were estimated by using synthesized C-S-H. Two C-S-H samples were synthesized. The target C/S ratios were 1.00 and 1.25. Furthermore, the amount of adsorbed water, the density and composition of C-S-H in hardened cement paste also were measured.<br/>From the experimental results, the water content of C-S-H under high relative humidity is same value independent of the drying condition(50℃ or 110℃). When the C/S ratio of synthesized C-S-H decreased, the water content at each relative humidity of C-S-H increased. The density of C-S-H dried at 50℃ was higher than that dried at 110℃. The density of C-S-H was increased by increasing in relative humidity. Furthermore, the density of C-S-H at about RH80% represented the maximum value. From these results, the density of C-S-H was expressed by the H/S ratio independent of the drying condition(50℃ or 110℃). The change of density at each relative humidity was expected to cause the change of the interlayer structure in C-S-H. As with the results of synthesized C-S-H, the density of hardened cement paste changed at each relative humidity. In addition, the density of hardened cement paste at each relative humidity was evaluated by the amount and density of C-S-H in hardened cement paste.

    DOI: 10.14250/cement.67.157

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  • カルシウムアルミネート系水和物を考慮したセメント硬化体の比表面積の推定方法に関する基礎的検討 Reviewed

    寺戸政成, 須田裕哉, 斎藤豪, 佐伯竜彦

    セメント・コンクリート論文集   Vol. 66   pp. 197-204   2012

  • BASIC STUDY ON STRENGTH CHARACTERISTIC OF FLY ASH CONCRETE UNDER STEAM CURING Reviewed

    TOMIYAMA Jun, SUDA Yuya, SAEKI Tatsuhiko, SATO Michio

    Cement Science and Concrete Technology   Vol. 66 ( 1 )   pp. 359-366 - 366   2012

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    Recently great demand for precast concrete members has increased due to the construction ability, productivity, quality control and shortening of construction period. On the construction of precast concrete members, steam curing is the most popular technique to be applied since the process requires high compressive strength at early stage. In this study, fly ash concrete has been used to increase the performance of concrete. Performing the tests on the concrete and the cement paste under different curing conditions, this research investigates temperature control effect, compressive strength and reaction characteristics. The paper concludes that fly ash concrete shows the great advantages under steam curing and it can be used to precast concrete members.

    DOI: 10.14250/cement.66.359

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  • セメント系硬化体の水和物の水蒸気吸着等温線に関する研究 Reviewed

    須田裕哉, 斎藤豪, 佐伯竜彦

    セメント・コンクリート論文集   Vol. 66   pp. 167-174   2012

  • ビーライトから生成するC-S-Hの比表面積に関する検討 Reviewed

    土田詩織, 須田裕哉, 斎藤豪, 佐伯竜彦

    セメント・コンクリート論文集   Vol. 66   pp. 175-181   2012

  • 各種セメント硬化体の相組成と圧縮強度に関する研究 Reviewed

    須田裕哉, 斎藤豪, 佐伯竜彦

    セメント・コンクリート論文集   Vol. 66   pp. 159-166   2012

  • STUDY ON SPECIFIC SURFACE AREA OF HYDRATION PRODUCTS IN HARDENED CEMENT PASTE Reviewed

    SUDA Yuya, TSUCHIDA Shiori, SAEKI Tatsuhiko

    Cement Science and Concrete Technology   Vol. 65 ( 1 )   pp. 103-110 - 110   2011

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    C-S-H is a dominant hydration product of cementitious materials. Therefore, its chemical composition and physical properties affect the properties of concrete. However, the composition and the properties of C-S-H, and the relation between both have not been completely clarified. In order to evaluate the concrete performance accurately, the physical properties of concrete should be evaluated accuracy. Therefore, it is important to clarify the chemical composition and the physical properties of C-S-H. <br/>The purpose of this study is to clarify the chemical composition(the C/S ratio and H/S ratio)and specific surface area of C-S-H. The C/S ratio, the H/S ratio and the specific surface area of C-S-H were estimated by using synthesized C-S-H and C-S-H generated from synthesized alite paste. In addition, the specific surface area of calcium hydroxide and calcium aluminate hydrates were estimated by synthesized hydration products. Furthermore, the specific surface area of hardened cement paste was measured.<br/> From the experimental results, the H/S ratio of C-S-H under each relative humidity is proportional to the C/S ratio independent of the mix proportion and curing temperature. From these results, the relation equation between the C/S ratio and specific surface area of C-S-H is proposed. Moreover, the specific surface area of hardened cement pastes can be estimated by the amount of hydration products and each specific surface area of hydration products.

    DOI: 10.14250/cement.65.103

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  • シリカフュームコンクリートの塩化物イオン拡散性状および固定化特性 Reviewed

    川原真一, 嶋毅, 須田裕哉, 佐伯竜彦

    セメント・コンクリート論文集   Vol. 64   pp. 354-361   2010

  • C-S-Hの組成と物理的性質に関する基礎的検討 Reviewed

    須田裕哉, 田中洋介, 佐伯竜彦

    土木学会論文集   Vol. 66 ( No.4 )   pp. 528-544   2010

  • 酸素および塩化物イオンの実効拡散係数によるセメント系硬化体におけるイオン移動性状の評価 Reviewed

    菊地道生, 須田裕哉, 佐伯竜彦

    セメント・コンクリート論文集   Vol. 64   pp. 346-353   2010

  • エーライトが生成するC-S-Hの組成に関する基礎的研究 Reviewed

    須田裕哉, 佐伯竜彦, 佐々木謙二

    コンクリート工学年次論文集   Vol. 31 ( No.1 )   pp. 43-48   2009

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  • FUNDAMENTAL STUDY ON DENSITY OF C-S-H Reviewed

    TANAKA Yosuke, SAEKI Tatsuhiko, SASAKI Kenji, SUDA Yuya

    Cement Science and Concrete Technology   Vol. 63 ( 1 )   pp. 70-76 - 76   2009

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    C-S-H is dominant hydration product of cement. Therefore, the densities of C-S-H are precious fundamental property. For example, the density of C-S-H is needed to calculate the porosity of hardened cement paste. In researches, the values of the C-S-H density are different.<br/>The purpose of this study is to clarify the density of C-S-H formed by hydration of cementitious materials. In this study, synthesized C-S-H and alite paste, blast furnace slag - calcium hydroxide paste were used. Two kinds of synthesized C-S-H were used for the experiment. A kind of C-S-H was contained aluminum and another was not contained. Densities of the synthesized C-S-H and the C-S-H generated by the hydration of alite and blast furnace slag were measured. The densities of C-S-H were calculated based on density and phase composition of hardened cement pastes. Furthermore, CaO/SiO<sub>2</sub> molar ratios of the C-S-H in all were measured. Moreover, Effect of temperature and water to binder ratio were studied.<br/>Density of C-S-H depended on CaO/SiO<sub>2</sub> molar ratio of C-S-H. The density of C-S-H increased with increasing of CaO/SiO<sub>2</sub> molar ratio of C-S-H. The relation between density and CaO/SiO<sub>2</sub> molar ratio was formulated as a linear equation. This relationship was independent of source of C-S-H.

    DOI: 10.14250/cement.63.70

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  • EFFECT OF CHEMICAL COMPOSITION OF C-S-H ON CHLORIDE DIFFUSION Reviewed

    KIKUCHI Michio, SASAKI Kenji, SUDA Yuya, SAEKI Tatsuhiko

    Cement Science and Concrete Technology   Vol. 63 ( 1 )   pp. 354-361 - 361   2009

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    Language:Japanese   Publisher:Japan Cement Association  

    It is important for service life prediction of concrete structures to estimate mass transport in concrete accurately. Mass transport in concrete depends on the microstructure of concrete. The microstructure of concrete is affected by addition of mineral admixtures, such as ground granulated blast-furnace slag and fly ash.<br/>The microstructure of concrete is affected by the amounts and kinds of hydration products. C-S-H is dominant hydration products. Ca/Si molar ratio of C-S-H depends on types and replacement ratio of mineral admixtures, water to binder ratio and curing period. Physical and electrochemical properties of C-S-H are affected by Ca/Si ratio.<br/>In this study, the effect of Ca/Si molar ratio of C-S-H on chloride diffusion was studied. Chloride diffusion coefficient, pore size distribution, and the amount of hydration products of hardened cementitious paste were measured. And the zeta potential of hardened cementitious paste and synthetic C-S-H was measured.<br/>'Microstructure characterization factor' which was an index expressing complexity of microstructure was defined. It was calculated from a chloride diffusion coefficient, self-diffusion coefficient and total pore volume. From the experimental results, the relation between 'the microstructure characterization factor' and the surface area of C-S-H per unit volume of hardened cementitious paste which was calculated by the amount of C-S-H and the specific surface area of C-S-H in consideration with Ca/Si molar ratio, was studied.<br/>The tendency that 'the microstructure characterization factor' became large as the surface area of C-S-H per unit volume of hardened cementitious paste became larger was shown. Moreover, the effect of electric property of pore surface on chloride ion diffusion was considered. The zeta potential of C-S-H was changed due to Ca/Si molar ratio. When Ca/Si molar ratio of C-S-H was low, physical and electric resistance increased. Therefore, chloride diffusion coefficient became small. 'The microstructure characterization factor' can be estimated using the zeta potential and the surface area of C-S-H per unit volume of hardened cementitious paste.

    DOI: 10.14250/cement.63.354

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MISC

  • コンクリートの炭酸化と湿度・水分環境 Reviewed

    須田裕哉

    コンクリート工学   61 ( 9 )   782 - 787   2023.9

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  • 炭酸化したセメントペーストの水和物とpHの変化に及ぼす相対湿度の影響

    須田裕哉, 富山潤

    セメント技術大会講演要旨(CD-ROM)   75th   2021

  • 炭酸化によるフライアッシュを用いたセメント硬化体の相組成変化と収縮挙動に及ぼす相対湿度の影響

    須田裕哉, 富山潤, 斎藤豪, 佐伯竜彦

    セメント技術大会講演要旨(CD-ROM)   74th   2020

  • A Review on Change of Microstructure in Hardened Cement Paste with/without Supplementary Cementitious Materials due to Carbonation Reviewed

    須田裕哉

    コンクリート工学   58 ( 10 )   2020

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    J-GLOBAL

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  • 薄板ペースト供試体を用いたコンクリート構造物の部位・部材毎の品質変化に基づく劣化環境評価手法に関する基礎的検討

    須田裕哉, 富山潤

    土木学会年次学術講演会講演概要集(CD-ROM)   74th   2019

  • セメント硬化体の炭酸化収縮に及ぼす相対湿度の影響に関する研究

    須田裕哉, 富山潤, 斎藤豪, 佐伯竜彦

    セメント技術大会講演要旨(CD-ROM)   73rd   2019

  • 画像解析を用いたひび割れ定量評価技術の高架橋ひび割れ点検への適用

    堀口賢一, 鈴木三馨, 本澤昌美, 岡部成行, 鈴木浩一, 山田義智, 富山潤, 崎原康平, 須田裕哉

    土木学会年次学術講演会講演概要集(CD-ROM)   73rd   2018

  • UAVを用いたインフラ点検におけるひび割れ撮影技術

    岡部成行, 鈴木浩一, 鈴木三馨, 本澤昌美, 堀口賢一, 山田義智, 富山潤, 崎原康平, 須田裕哉

    土木学会年次学術講演会講演概要集(CD-ROM)   73rd   2018

  • 画像解析を用いたひび割れ定量評価技術の離島架橋ひび割れ点検への適用

    鈴木三馨, 本澤昌美, 堀口賢一, 岡部成行, 鈴木浩一, 山田義智, 富山潤, 崎原康平, 須田裕哉

    土木学会年次学術講演会講演概要集(CD-ROM)   73rd   2018

  • 湿度による乾燥を受けたフライアッシュセメントペーストの塩化物イオンの拡散性状に関する基礎的検討

    須田裕哉, 富山潤, 斎藤豪, 佐伯竜彦

    土木学会年次学術講演会講演概要集(CD-ROM)   73rd   2018

  • 混和材を用いたセメント硬化体の圧縮強度に及ぼすLow density C-S-HとHigh density C-S-Hの影響

    須田裕哉, 富山潤, 斎藤豪, 佐伯竜彦

    セメント技術大会講演要旨(CD-ROM)   71st   2017

  • 実構造物に使用したコンクリート配合に対するアルカリシリカ反応抑制の確認試験

    比屋根方新, 神谷和志, 上里尚也, 富山潤, 須田裕哉, 藍檀オメル, 佐古翔輝

    土木学会年次学術講演会講演概要集(CD-ROM)   72nd   2017

  • 論文賞を受賞して

    菊地 道生, 須田 裕哉, 佐伯 竜彦

    セメントコンクリート   ( 775 )   46 - 47   2011.9

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Presentations

  • 収縮低減剤および MgOによる高炉セメントC種の中性化抑制効果

    須田裕哉, 石底健太郎, 富山潤

    令和5年度土木学会全国大会第78回年次学術講演会講演要旨  2023.9 

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    Event date: 2023.9

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  • 内部構造観察による遅延膨張性骨材を使用したコンクリートの塩分浸透に及ぼすASRの影響評価

    屋嘉俊也, 須田裕哉, 富山潤, 比屋根方新

    令和5年度土木学会全国大会第78回年次学術講演会講演要旨  2023.9 

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  • 異なる相対湿度・CO2 濃度におけるセメントペーストの炭酸化進行に関する検討

    須田裕哉, 野中栄太郎, 金城雄大, 丸山一平

    第77回セメント技術大会講演要旨  2023.5 

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    Event date: 2023.5

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  • 多重パラメータ動態観測による土木構造物の長期挙動と地震時応答及びロックアンカーの健全性評価に関する基礎的研究

    盛田樹里, 藍檀オメル, 渡嘉敷直彦, 富山潤, 須田裕哉, 柏柳正之, 鳥羽瀬孝臣

    土木学会年次学術講演会講演概要集(CD-ROM)  2018 

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    Event date: 2018

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  • 炭酸化収縮による骨材周囲の損傷発生と鋼材腐食進行に関する基礎的研究

    須田裕哉, 富山潤, 加藤陽介

    令和6年度土木学会全国大会第78回年次学術講演会  2024.9 

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  • 炭酸化による混合セメント硬化体の微細構造変化に及ぼす相対湿度の影響

    須田裕哉, 富山潤

    土木学会全国大会第76回年次学術講演会  2021.9 

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  • 炭酸化したセメントペーストの水和物とpH の変化に及ぼす相対湿度の影響

    須田裕哉, 富山潤

    第75回セメント技術大会講演要旨,pp.222-223,2021  2021.5 

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  • 炭酸化によるフライアッシュを用いたセメント硬化体の相組成変化と収縮挙動に及ぼす相対湿度の影響

    須田裕哉, 富山潤, 斎藤豪, 佐伯竜彦

    第74回セメント技術大会講演要旨,pp.188-189,2020  2020 

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  • 薄板ペースト供試体を用いたコンクリート構造物の 部位・部材毎の品質変化に基づく劣化環境評価手法に関する基礎的検討

    須田裕哉, 富山潤

    土木学会全国大会第74回年次学術講演会  2019.9 

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  • A fundamental study on the foundations in Ryukyu Limestone Formation and the shear properties of interfaces and discontinuities under static and dynamic loading conditions

    Yutaro. Araki, Takashi Ito, Jun Tomiyama, Yuya Suda, Kouki Horiuchi, Naoki, Tokashiki, Ömer Aydan

    2019.5 

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  • セメント硬化体の炭酸化収縮に及ぼす 相対湿度の影響に関する研究

    須田裕哉, 富山潤, 斎藤豪, 佐伯竜彦

    第73回セメント技術大会講演概要集  2019.5 

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  • The numerical analysis of response and stability of stone masonry bridges in Aizanoi Antique City in Kütahya Province of Turkey

    Jun Tomiyama, Yuya Suda, Ömer. Aydan

    A Specialized Conference of ISRM 2019 Rock Dynamics Summit in Okinawa  2019.5 

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  • Mechanical behaviour and characteristics of rocks subjected to shock loads

    Sinya Kodate, Jun Tomiyama, Yuya Suda, Kouki Horiuchi, Ömer Aydan

    A Specialized Conference of ISRM 2019 Rock Dynamics Summit in Okinawa  2019.5 

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  • The effect of characteristics of back-filling material on the seismic response and stability of castle retaining-walls

    Yoshitaka. Yamashiro, Ömer, Aydan, Naoki, Tokashiki, Jun, Tomiyama, Yuya, Suda

    A Specialized Conference of ISRM 2019 Rock Dynamics Summit in Okinawa  2019.5 

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  • 湿度による乾燥を受けたフライアッシュセメントペーストの塩化物イオンの拡散性状に関する基礎的検討

    須田裕哉, 富山潤, 斎藤豪, 佐伯竜彦

    土木学会第73回年次学術講演会  2018.9 

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  • 混和材を用いたセメント硬化体の圧縮強度に及ぼすLow density C-S-H とHigh density C-S-H の影響

    須田裕哉, 富山潤, 斎藤豪, 佐伯竜彦

    第71回セメント技術大会講演概要集,pp. 28-29  2017 

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  • C-S-Hの組成と比表面積の関係に及ぼすAl置換の影響に関する研究

    須田裕哉, 河野伊知郎, 斎藤豪, 佐伯竜彦

    第69回セメント技術大会講演概要集  2015 

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  • 温度履歴を与えたフライアッシュセメント硬化体の相組成と強度発現性状に関する検討

    須田裕哉, 菊地道生, 佐伯竜彦, 鷲尾朝昭

    第68回セメント技術大会講演概要集  2014 

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  • 湿度の変化に伴うC-S-Hの組成および密度に関する基礎的検討

    須田裕哉, 佐伯竜彦, 斎藤豪

    第67回セメント技術大会講演概要集  2013 

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  • セメント系硬化体の水和物の水蒸気吸着量に関する研究

    須田裕哉, 佐伯竜彦, 斎藤豪

    第66回セメント技術大会講演概要集  2012 

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  • ビーライトから生成されるC-S-Hの比表面積に関する検討

    土田詩織, 須田裕哉, 佐伯竜彦, 斎藤豪

    第66回セメント技術大会講演概要集  2012 

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  • カルシウムアルミネート系水和物の物理的性質に関する基礎的研究

    寺戸政成, 佐伯竜彦, 斎藤豪, 須田裕哉

    第66回セメント技術大会講演概要集  2012 

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  • Relation between Chemical Composition and Physical Properties of C-S-H in Cement Paste

    Yuya Suda, Tatsuhiko Saeki

    Proceedings of the International Symposium on Fusion Tech 2011  2011.12 

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  • Relation between Chemical Composition and Physical Properties of C-S-H

    Yuya Suda, Tatsuhiko Saeki

    The 2011 World Congress on Advances in Structural Engineering and Mechanics (ASEM’11+)  2010.5 

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  • Fundamental study on the composition of C-S-H generated from alite

    Yuya Suda, Tatsuhiko Saeki

    The 7th International Symposium on Cement & Concrete (ISCC2010)  2010.5 

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  • セメント系硬化体のC-S-Hの組成と比表面積の関係式の高精度化

    須田裕哉, 佐伯竜彦

    第65回セメント技術大会講演概要集  2010 

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  • エーライトが生成するC-S-Hの組成変化に関する検討

    須田裕哉, 佐伯竜彦

    第64回セメント技術大会講演要旨  2010 

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  • 酸素および塩化物イオンの拡散係数による物質移動性状の評価

    菊地道生, 須田裕哉, 笠原俊亮, 佐伯竜彦

    第64回セメント技術大会講演要旨  2010 

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  • C-S-Hの物理的性質の評価

    田中洋介, 須田裕哉, 佐伯竜彦

    第64回セメント技術大会講演要旨  2010 

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  • シリカフュームコンクリートの塩分浸透抵抗性向上のメカニズムに関する基礎的研究

    川原真一, 須田裕哉, 佐伯竜彦, 嶋毅

    第64回セメント技術大会講演要旨  2010 

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  • C-S-Hの密度に関する基礎的検討

    田中洋介, 佐伯竜彦, 佐々木謙二, 須田裕哉

    第63回セメント技術大会講演要旨  2009 

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Awards

  • 第44回コンクリート工学講演会年次論文奨励賞

    2022.7   日本コンクリート工学会  

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  • ConMat'20 Best Paper Award

    2020  

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  • 第39回コンクリート工学講演会年次論文奨励賞

    2017   コンクリート工学会  

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  • 第68回セメント技術大会優秀講演者賞

    2014   セメント協会  

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  • 第66回セメント技術大会優秀講演者賞

    2012   セメント協会  

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  • 第39回セメント協会論文賞

    2011   セメント協会  

    菊地道生, 須田裕哉, 佐伯竜彦

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Research Projects

  • Understanding Degradation of Concrete Due to Carbonation of C-(A)-S-H and Inhibition Mechanism by Reactive MgO

    Grant number:25K01306

    2025.4 - 2029.3

    System name:Grants-in-Aid for Scientific Research

    Research category:Grant-in-Aid for Scientific Research (B)

    Awarding organization:Japan Society for the Promotion of Science

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    Grant amount:\18850000 ( Direct Cost: \14500000 、 Indirect Cost:\4350000 )

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  • リアルタイムモニタリング手法を用いたコンクリートの中性化進行に及ぼす環境条件の影響評価

    2025.4 - 2026.3

    System name:研究助成

    Awarding organization:公益財団法人 前田記念工学振興財団

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  • 炭酸化による高炉セメントコンクリートの変質とMgによる抑制効果

    2023.11 - 2025.11

    System name:第44回助成研究

    Awarding organization:公益財団法人 鉄鋼環境基金

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  • 収縮低減による混合セメント系材料の中性化抑制技術の開発

    2022.4 - 2023.3

    System name:令和4年度前田記念工学振興財団 研究助成

    Awarding organization:前田記念工学振興財団

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  • 混和材を使用したコンクリートにおける炭酸化収縮による骨材界面でのひび割れの発生評価に関する研究

    2021.4 - 2022.3

    System name:セメント協会研究奨励金

    Awarding organization:セメント協会

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    Authorship:Principal investigator 

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  • 異なる環境条件におけるC-S-Hの炭酸化の解明とコンクリートの品質評価への展開

    Grant number:20K04644

    2020.4 - 2023.3

    System name:科学研究費助成事業 基盤研究(C)

    Research category:基盤研究(C)

    Awarding organization:日本学術振興会

    須田 裕哉

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    Grant amount:\4420000 ( Direct Cost: \3400000 、 Indirect Cost:\1020000 )

    本研究では、炭酸化時の湿度条件の違いがセメントペースト中の個々の水和物の炭酸化進行と空隙構造の変化に及ぼす影響について検討を行った。炭酸化時の相対湿度43%、56%、85%の3条件で検討を行った結果、相対湿度85%では、水和物としてポルトランダイトの炭酸化が進行し、相対湿度43%,56%では、C-S-Hの炭酸化が進行することをFT-IRによって確認した。また、C-S-Hの炭酸化が進行した供試体では、炭酸カルシウムとして,アラゴナイトとバテライトが生成した。空隙構造の評価では、C-S-Hの炭酸化が進行した相対湿度43%、56%の供試体において、微細な空隙が減少し、粗大な空隙が増加した。特に、C-S-Hの炭酸化が進行した供試体ではゲル空隙に相当するような空隙率が大きく減少した。さらに、実環境での暴露と実験室で乾燥および促進炭酸化させたセメントペーストの水和物の微細構造の変化に着目し、自然環境の炭酸化機構について検討を行った結果、暴露供試体中で生成した炭酸カルシウムは主として、カルサイトが生成しており、FT-IRの結果からC-S-Hの炭酸化に伴う波数のシフトは確認されなかった。したがって、本研究の暴露条件における炭酸化では、ポルトランダイトの炭酸化が進行し、C-S-Hの炭酸化は顕著に進行していなかったことが確認された。
    炭酸化収縮挙動の検討では、コンクリート供試体を対象に、骨材界面で生じる収縮による損傷を蛍光エポキシ樹脂含浸法により評価し、炭酸化による供試体断面のひずみの変化をデジタル画像相関法で測定した。その結果、炭酸化の促進環境下において、骨材周囲に損傷を確認し、炭酸化によって生じた損傷は乾燥収縮による損傷が起点となって大きく進行することが明らかとなった。また、酸素の拡散試験より、損傷を受けた供試体ほど物質透過に対する抵抗性が低下する可能性があることが示唆された。

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  • 塩害とASRの複合劣化環境における遅延膨張性骨材を用いたコンクリートの劣化特性

    2020.4 - 2021.3

    System name:調査研究

    Awarding organization:一般社団法人 沖縄しまたて協会

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  • セメント硬化体の炭酸化収縮の湿度依存性と機構解明

    2018.4 - 2019.3

    System name:セメント協会研究奨励金

    Awarding organization:セメント協会

    須田裕哉

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    Authorship:Principal investigator  Grant type:Competitive

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  • ペーストチップによる環境履歴を受けたコンクリートの部位・部材毎の品質評価手法の開発

    2018.4 - 2019.3

    System name:研究助成

    Awarding organization:前田記念工学振興財団

    須田裕哉

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    Authorship:Principal investigator  Grant type:Competitive

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  • 地域間の環境作用に着目したセメント硬化体の物質移動性状に関する基礎検討

    2018.4 - 2019.3

    System name:研究助成

    Awarding organization:日本コンクリート工学会

    須田裕哉

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    Authorship:Principal investigator  Grant type:Competitive

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  • Evaluation of the mass transfer properties of concrete by hydration product in consideration of the environmental effects of Okinawa

    Grant number:17K14709

    2017.4 - 2020.3

    System name:Grants-in-Aid for Scientific Research Grant-in-Aid for Young Scientists (B)

    Research category:Grant-in-Aid for Young Scientists (B)

    Awarding organization:Japan Society for the Promotion of Science

    Suda Yuya

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    Grant amount:\4420000 ( Direct Cost: \3400000 、 Indirect Cost:\1020000 )

    The environmental effect in Okinawa on mass transport of concrete was investigated. In addition, the purpose of this study is to clarify the different of the environmental effect between areas. As a result, the diffusion coefficient of chloride ion and oxygen gas increased with the decreasing the relative humidity at the arbitrary drying condition . In order to evaluate the effect between areas on diffusion coefficient of ion, hardened cement samples were exposed at Okinawa and Niigata. The diffusion coefficient of sample changed during the proceeding of exposure period. Results indicated that the property of mass transport is influenced by the drying and carbonation during the exposure period. In the fundamental study, cement paste samples were exposed to accelerated carbonation under 3% carbon dioxide concentration at different RH conditions. It is clarified that the change of the mass transport is affected by the structural change with the change of chemical composition of C-S-H.

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  • New material design and mix design methods of concrete based on C-S-H

    Grant number:17H01285

    2017.4 - 2020.3

    System name:Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (A)

    Research category:Grant-in-Aid for Scientific Research (A)

    Awarding organization:Japan Society for the Promotion of Science

    SAEKI TATSUHIKO

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    Grant amount:\31590000 ( Direct Cost: \24300000 、 Indirect Cost:\7290000 )

    The possibility of the recycled cement was recognized by comparing the generated C-S-H from β-C2S and the starting synthetic C-S-H. It is clarified that the volume change behavior of cement paste is influenced by the structural change depending on the change of the chemical composition of C-S-H during the drying/wetting and carbonation.
    The influence of various hydration products on mass transfer was estimated by regression analysis.

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  • 乾燥の条件や期間の違いがセメント硬化体の水和物の性質と物質移動性状の関係に及ぼす影響

    2016.4 - 2017.3

    System name:セメント協会研究奨励金

    Awarding organization:セメント協会

    須田裕哉

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    Authorship:Principal investigator  Grant type:Competitive

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  • C-S-Hの物理的・電気的性質による高炉セメント硬化体の 物質移動性状の解明

    2015.11 - 2016.10

    System name:若手研究助成

    Awarding organization:鉄鋼環境基金

    須田裕哉

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    Authorship:Principal investigator  Grant type:Competitive

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  • Developments of methods for evaluating volume change of hardened cement paste based on physical properties of hydration product

    Grant number:26820181

    2014.4 - 2017.3

    System name:Grants-in-Aid for Scientific Research Grant-in-Aid for Young Scientists (B)

    Research category:Grant-in-Aid for Young Scientists (B)

    Awarding organization:Japan Society for the Promotion of Science

    SUDA Yuya

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    Grant amount:\3250000 ( Direct Cost: \2500000 、 Indirect Cost:\750000 )

    The purpose of this study is to develop a method to evaluate the volume change of hardened cement paste based on hydration products and pore structure. In the results, it is shown that the specific surface area of Calcium silicate hydrate(C-S-H), which was dominant hydration product of cementitious materials, was increased by the low Ca/Si ratio and high Al/Si ratio. In the high drying humidity, the tortuosity of hardened cement paste was affected by pore volume. On the other hand, in the low drying humidity, the tortuosity of hardened cement paste was affected by hydration products. Furthermore, it is experimentally confirmed that the change of mesoscale structure of hardened cement paste is dominant factor to drying shrinkage.

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  • 混和材料から生成するC-S-Hの物理化学的性質に関する研究

    2014.4 - 2015.3

    System name:セメント協会研究奨励金

    Awarding organization:セメント協会

    須田裕哉

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    Authorship:Principal investigator  Grant type:Competitive

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  • 湿度の違いがC-S-Hの組成および密度の変化に及ぼす影響

    2012.4 - 2013.3

    System name:セメント協会研究奨励金

    Awarding organization:セメント協会

    須田裕哉

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    Authorship:Principal investigator  Grant type:Competitive

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