Faculty Profiles - YAMAGUCHI Toshinobu

Papers - YAMAGUCHI Toshinobu

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S YOUKAWA, Y AKIRA, K TAKEWAKA, T YAMAGUCHI, K KOIKE, M KAWABATA . INFLUENCE OF POLYMER CONTENT IN PCM ON MACRO-CELL CORROSION AFTER CROSS-SECTION REPAIR . Advances in Construction Materials Proceedings of the ConMat’20 1288 - 1296 2020.8Reviewed

SACHIKO HAYASHIGUCHI, MAKOTO YAMAMOTO, TOSHINOBU YAMAGUCHI, KOJI TAKEWAKA, YOSHIKAZU AKIRA, MASAHIKO MONIWA . EXAMINATION ON APPLYING OF THERMAL SPRAYED GALVANIC ANODE CATHODIC PROTECTION SYSTEM FOR REINFORCED CONCRETE STRUCTURE . Advances in Construction Materials Proceedings of the ConMat’20 1097 - 1107 2020.8Reviewed

川畑雅樹、審良善和、武若耕司、山口明伸 . RC構造物における断面修復を伴う電気防食工法のモニタリング位置の違いが防食効果に及ぼす影響 . コンクリート工学年次論文集第４２巻42 ( 1 ) 785 - 790 2020.7Reviewed

竹田宣典、江良和徳、濱崎仁、山口明伸、田中博一、十河茂幸 . 既設コンクリート構造物の予防保全を目的とした調査・診断・補修に関する研究委員会　委員会報告 . コンクリート工学年次論文集第４２巻42 ( 1 ) 1315 - 1320 2020.7

武若耕司、濵田秀則、山口明伸、審良善和 . 亜鉛めっき鉄筋を用いたコンクリート構造物の設計・施工指針（案）について . 建設マネジメント技術 92 - 99 2020.6

武若耕司、濵田秀則、山口明伸、審良善和 . 亜鉛めっき鉄筋を用いたコンクリート構造物の設計・施工指針（案）について . 土木施工単価 10 - 17 2020.4

Katpady D. . Performance of slag based Shirasu geopolymer cured under ambient condition . Construction and Building Materials234 2020.2

Dhruva Narayana Katpadya, Koji Takewaka,Toshinobu Yamaguchi, Yoshikazu Akira . Performance of slag based Shirasu geopolymer cured under ambient condition . Construction and Building Materials234 2020.2Reviewed

武若耕司、山口明伸、審良善和 . 溶融亜鉛めっき鉄筋を使用したコンクリート構造物の寿命予測手法及び点検診断手法の確立に向けた基礎的研究 . JGA news81 34 - 39 2020.1Invited

川畑雅樹、濵田泰行、審良善和、武若耕司、山口明伸、小池賢太郎 . RC構造物に適用される電気防食工法における適切な電位モニタリング位置について . 防錆管理 2020.1Reviewed

山本貴士、山口明伸、審良善和、中村英佑 . 溶融亜鉛めっき鉄筋を用いた実構造物の調査に基づく耐久性評価 . JGA news81 44 - 49 2020.1

Horiguchi Kenichi, Yamaguchi Toshinobu, Maruya Tsuyoshi, Takewaka Koji . Study on the Method of Measuring the Chloride Threshold Value of Corrosion and Estimation of the Values in Durability Design of Concrete Structures . Journal of Advanced Concrete Technology18 ( 10 ) 571 - 587 2020

Publisher：公益社団法人日本コンクリート工学会

In this study, a method was developed to estimate accurately the chloride threshold value for corrosion initiation in reinforced concrete. In this method, chlorides are supplied through a part of the specimen surface, and half-cell potential between the rebar and reference electrode embedded in a concrete specimen was measured in every ten minutes. A sudden drop of half-cell potential was observed as the continuation of the measurement. At that time, the specimen was broken and corrosion of rebar on its narrow surface was confirmed. The chloride threshold value can be estimated by determining the chloride concentration at the time of the potential drop. The estimated chloride threshold values for normal Portland cement concrete with cement content between 254 and 446 kg/m3 are in the range of 1.6 to 3.6 kg/m3. This paper is an English translation from the authors' previous work [Horiguchi, K., Yamaguchi, T., Maruya, T. and Takewaka, K., (2015). "A study on the method of measuring the chloride threshold value of corrosion and on the estimation of the values." Journal of JSCE, Ser. E2, 71(2), 107-123. (in Japanese)].

DOI： 10.3151/jact.18.571

Scopus

CiNii Research

Yasuyuki Hamada, Masaki Kawabata, Yoshikazu Akira, Koji Takewaka, Toshinobu Yamaguchi, Kentaro Koike . Influence of monitoring position for cathodic protection on corrosion protection performance of rebar in RC structures . NACE International East Asia and Pacific Area Conference 2019 2019.11Reviewed

Hiromi Yamazumi, Koji Takewaka, Toshinobu Yamaguchi, Yoshikazu Akira . Study on durability of the RC Structure Using Galvanized Steel Bars in Chloride induced Deterioration Environment . NACE International East Asia and Pacific Area Conference 2019 2019.11Reviewed

富山潤、有澤希、須田裕哉、山口明伸、加藤佳孝 . コンクリート橋上部工の部位・部材毎の塩害劣化予測シミュレーション . 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19 617 - 622 2019.10Reviewed

Kazuya Sakamoto, Yoshikazu Akira, Koji Takewaka, Toshinobu Yamaguchi . Fatigue Resistance of Connection of Precast Concrete Segments Using Epoxy Resin and Anchor Combination . The 3rd Asian concrete Federation (ACF) Symposium2019 S2-3 - 5 2019.9Reviewed

Kazuya Sakamoto, Yoshikazu Akira, Koji Takewaka, Toshinobu Yamaguchi . Structural Stability and Fatigue Resistance of Precast Concrete Barriers Installed Using Anchors and Epoxy Resin . Bridge Engineering Institute Conference (BEI-2019) 667 - 671 2019.7Reviewed

栗野広大、審良善和、武若耕司、山口明伸、伊川辰茂、安江省吾 . 磁気吸着機構を利用したAI合金陽極の設置が電気防食効果に及ぼす影響 . 防錆管理63 ( 3 ) 95 - 99 2019.3Reviewed

武若耕司、濵田秀則、佐藤靖彦、宮里心一、山口明伸、山本貴士、審良善和　他 . 亜鉛めっき鉄筋を用いるコンクリート構造物の設計・施工指針（案） . 土木学会 2019.3

Takewaka K., Hamada H., Yamaguchi T., Akira Y. . Outline of Japan Society of Civil Engineers (JSCE) Guideline on Design and Application Methods of Galvanized Steel Reinforcement for Concrete Structures . Concrete Journal57 ( 12 ) 903 - 908 2019

Publisher：Japan Concrete Institute

In March 2019, the Concrete Committee of the Japan Society of Civil Engineers published a revised version of "Guideline on Design and Application Methods of Galvanized Steel Reinforcement for Concrete Structures". This latest version updates the previous guideline published in 1980, while introducing the concept of performance design to allow durability design of concrete structures using galvanized steel reinforcement. This paper introduces the content of the main parts of the revised guideline.

DOI： 10.3151/coj.57.12_903

CiNii Research

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Papers - YAMAGUCHI Toshinobu