KOBAYASHI Koichi

J-GLOBAL         Last updated: Mar 25, 2019 at 13:39
 
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Name
KOBAYASHI Koichi
Affiliation
Gifu University
Section
Faculty of Engineering
Degree
-
Research funding number
20283624
ORCID ID
0000-0002-6742-0259

Profile

Durability of concrete structures/Maintenance of concrete structures

Academic & Professional Experience

 
Dec 2013
 - 
Today
Professor, Dept. of Engineering, Gifu University
 
Mar 2007
 - 
Nov 2013
Associate Professor, Dept. of Engineering, Gifu University
 
Dec 2008
 - 
Sep 2009
Visiting Professor, The University of British Columbia
 
Apr 1999
 - 
Feb 2007
Lecturer/Associate Professor, Dept. of Engineering, Chubu University
 
Sep 2001
 - 
Sep 2002
Visiting Researcher, The University of Leeds
 
Apr 1996
 - 
Mar 1999
Research Associate, Dept. of Engineering, Kyoto Univeristy
 

Education

 
 
 - 
1996
Graduate School, Division of Engineering, Kyoto University
 
 
 - 
1992
Faculty of Engineering, Kyoto University
 

Committee Memberships

 
Apr 2017
 - 
Today
JSCE concrete committee,  Secretary General
 
Apr 2017
 - 
Sep 2018
BCCM4, 4th Brazilian Conference on Composite Materials,  International Scientific and Advisory Committee, Member
 
Feb 2016
 - 
Sep 2017
SHCC4 (International Conference on Strain Hardening Cementitious Composites),  Scientific Committee, Member
 
Aug 2015
 - 
Today
Cement and Concrete Composites,  Editorial Board, Member
 
Aug 2015
 - 
Sep 2016
BEFIB 2016 (9th Rilem International Symposium on Fiber Reinforced Concrete),  Technical committee, Member
 
Jun 2015
 - 
Today
fib,  TG3.4, Member
 
May 2015
 - 
May 2017
JSMS,  Director
 
Jun 2014
 - 
Aug 2015
ConMat'15 (The FifthInternational Conference on Construction Materials),  Steering Committee, Member
 
Jun 2014
 - 
Aug 2015
ConMat'15 (The Fifth International Conference onConstruction Materials),  Science committee, Co-Chair
 
Oct 2013
 - 
Nov 2014
SHCC3 - Third RILEM InternationalConference on Strain Hardening Cementitious Composites,  Scientific Committee, Member
 
Jun 2011
 - 
Aug 2013
SMCT3 -3rd International Conference on Sustainable Construction Materials and Technologies  Organizing committee, Member
 
Jun 2011
 - 
Sep 2011
BEFIB2012 “8th RILEM Symposium on fibre reinforced concrete",  Scientific Committee, Member
 
Mar 2011
 - 
Nov 2011
SHCC2 - Second RILEM International Conference on Strain Hardening Cementitious Composites,  Scientific Committee, Member
 
Sep 2010
 - 
Sep 2016
RILEM  TC FDS(A Framework for Durability design of fibre­reinforced Strain hardening cement­based composites), Member
 
May 2009
 - 
Today
fib  Committee 8 (Durability), Member
 

Awards & Honors

 
Jun 2016
Research Paper Award, JSCE
 
Dec 2013
2011 Best Paper JCSHM (Journal of Civil Structural Health Monitoring)
 
2006
Best Paper Award, Japan Concrete Institute
 

Published Papers

 
Seok-Joon Jang, Hyun-Do Yun, Sun-Woo Kim, Wan-Shin Park, Koichi Kobayashi
Magazine of Concrete Research   71(8) 437-448   Apr 2019   [Refereed]
Strain-hardening cement composites (SHCCs), characterised by strain-hardening and multiple cracking behaviours under direct tension, are generally recognised as ductile and durable construction materials. The effect of the addition of superabsorbe...
Phuc Cong Tran, Koichi Kobayashi, Tatsuo Asano, Shinichi Kojima
Journal of Advanced Concrete Technology   16(10) 512-521   Oct 2018   [Refereed]
Silicate-based surface impregnations have received much attention in the protection of concrete against carbonation. However, the understanding of their behavior is still not widely understood. In the present study, protective performance and mech...
Kobayashi K, Yoshikura J.
Zairyo/Journal of the Society of Materials Science, Japan   67(8) 773-780   Aug 2018   [Refereed]
The deterioration process of concrete structure usually possesses large uncertainty. Furthermore, the re-deterioration process after the repair suffers much greater uncertainty, resulting in a difficulty in verifying cost-benefit of repair. This s...
Distribution of Lithium Nitrite Injected into Concrete and its ASR Suppression Effect
K. Kobayashi, K. Rokugo, Y. Takagi, T. Otani
Sixth International Conference on the Durability of Concrete Structures   40(1) 749-754   Jul 2018   [Refereed]
孫玟材,金圭庸,金武漢,小林孝一
コンクリート工学年次論文集   40(1) 327-332   Jul 2018   [Refereed]
Jang S.-J, Kim S.-W, Park W.-S, Kobayashi K, Yun H.-D.
Advances in Civil Engineering   2018    2018   [Refereed]
This paper describes the effects of expansive admixture on the mechanical properties of strain-hardening cement-based composite (SHCC) mixtures. Also, this study investigates structural performance of reinforced concrete (RC) beam specimens repair...
Kobayashi K, Suzuki M, Dung L.A, Yun H.-D, Rokugo K.
Construction and Building Materials   178 372-383   2018   [Refereed]
服部祐介,髙橋周斗,小林孝一
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   17 101-106   Oct 2017   [Refereed]
大谷智也,恩田尚明,高木雄介,小林孝一
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   17 469-474   Oct 2017   [Refereed]
Yusuke Hattori and Koichi Kobayashi
proceedings of 4th international RILEM conference on strain-hardening cement-based composites (SHCC4)   15 625-633   Sep 2017   [Refereed]
Koichi Kobayashi and Haruka Sanbongi
proceedings of 4th international RILEM conference on strain-hardening cement-based composites (SHCC4)   15 616-624   Sep 2017   [Refereed]
Shota Yoneyama, Satoru Sakai, Takumi Kojima, Koichi Kobayashi,
and Keitetsu Rokugo
proceedings of 4th international RILEM conference on strain-hardening cement-based composites (SHCC4)   15 79-87   Sep 2017   [Refereed]
Keitetsu Rokugo, Daichi Hayashi, Koichi Kobayashi, S.C. Lim,
and Hiroo Takada
proceedings of 4th international RILEM conference on strain-hardening cement-based composites (SHCC4)   15 333-341   Sep 2017   [Refereed]
Koichi Kobayashi, Yuta Kojima
Cement and Concrete Composites   80 235-244   Jul 2017   [Refereed]
© 2017 Elsevier LtdSHCC (Strain Hardening Cement-based Composite) is a material known for its strain-hardening behavior under tensile and bending stress and its characteristic numerous small cracks. SHCC is expected to show superior durability bec...
三本木晴香,小林孝一
コンクリート工学年次論文集   39(1) 1657-1662   Jul 2017   [Refereed]
Tran Cong Phuc,浅野達夫,馬居武志,小林孝一
コンクリート工学年次論文集   39(1) 1651-1656   Jul 2017   [Refereed]
米山翔太,坂井悟,小林孝一,六郷恵哲
コンクリート工学年次論文集   39(1) 229-234   Jul 2017   [Refereed]
TRAN Cong Phuc, KOJIMA Shinichi, ASANO Tatsuo, KOBAYASHI Koichi
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   16 557‐560   Oct 2016   [Refereed]
米山翔太, 坂井悟, 小島巧, 小林孝一, 六郷恵哲
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   16 461‐466   Oct 2016   [Refereed]
服部祐介, 鈴木雅人, 鈴木雅人, 小林孝一
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   16 263‐268   Oct 2016   [Refereed]
八藤後友也, 室谷満, 松川幸男, 佐藤雅宏, 小林孝一
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   16 561‐566   Oct 2016   [Refereed]
林大智, 六郷恵哲, 小林孝一, LIM Seung‐Chan, 高田浩夫
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   16 597‐602   Oct 2016   [Refereed]
水谷征治, 峰松敏和, 山本誠, 佐野清史, 小林孝一
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   16 275‐280   Oct 2016   [Refereed]
高木雄介, 大谷智也, 六郷恵哲, 小林孝一
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   16 39‐42   Oct 2016   [Refereed]
S. Miyazato, T. Yamamoto, R. Takahashi, T. Watanabe, K. Kobayashi
Proceedings of Fifth International Symposium on Life-Cycle Civil Engineering      Oct 2016   [Refereed]
Koichi Kobayashi, Yuto Hara, Yuta Kojima, Keitetsu Rokugo
Key Engineering Materials   711 375-381   Sep 2016   [Refereed]
© 2016 Trans Tech Publications, Switzerland.The chloride penetration depth and the corroded area on rebar were investigated for SHCC test specimens prepared with Portland cement on its own, and with 25% replacement with limestone powder. After bei...
八藤後友也, 室谷満, 松川幸男, 小林孝一
コンクリート工学年次論文集(CD-ROM)   38 ROMBUNNO.1312   Jun 2016   [Refereed]
西尾亮人, 柿澤雅樹, 六郷恵哲, 小林孝一
コンクリート工学年次論文集(CD-ROM)   38 ROMBUNNO.1069   Jun 2016   [Refereed]
Koichi Kobayashi, Dung Le Ahn, Keitetsu Rokugo
Cement and Concrete Composites   69 18-27   May 2016   [Refereed]
© 2016 Elsevier Ltd. All rights reserved.This study aims at developing an SHCC mixture that offers improved workability and high rebar corrosion proofing performance while ensuring moderate tensile ductility. Specimens were made from several mixtu...
TAKAGI YUSUKE, ONDA NAOAKI, ROKUGO KEITETSU, KOBAYASHI KOICHI
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   15 529-534   Oct 2015   [Refereed]
HARA YUTO, KOJIMA YUTA, ROKUGO KEITETSU, KOBAYASHI KOICHI
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   15 59-64   Oct 2015   [Refereed]
HAYASHI DAICHI, ROKUGO KEITETSU, OZAWA MITSUO, YUN HYUN-DO, KOBAYASHI KOICHI
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   15 453-458   Oct 2015   [Refereed]
Technical Development through Recycling of the Debris due to the Great East Japan Earthquake
Makoto Hisada, Koichi Kobayashi, Kenichi Horiguchi, Nobufumi Takeda, Masao Nishimura and Hiroshi Minagawa
Proceedings of ConMat’15 (Proceedings of the Fifth International Conference on Construction Materials)   210-219   Aug 2015   [Refereed]
Experimental Research into the Mechanical Properties of ASR-Degrated RC Members Repaired by Lithium Nitrite Pressurized Injection
Yusuke TAKAGI, Koichi KOBAYASHI, and Keitetsu ROKUGO
Proceedings of ConMat’15 (Proceedings of the Fifth International Conference on Construction Materials)   1130-1139   Aug 2015   [Refereed]
The Effect of W/C Ratio and Fiber Type on the Reinforcement Corrosion Prevention Performance of SHCC
KOBMasato SUZUKI, Koichi KOBAYASHI, and Keitetsu ROKUGOAYASHI Koichi
Proceedings of ConMat’15 (Proceedings of the Fifth International Conference on Construction Materials)   1139-1149   Aug 2015   [Refereed]
Buckling-Behavior of UV-Cured FRP Repair-Sheet due to Narrowing Concrete Crack Width
Masaki Kakizawa, Kousuke Tanabe, Koichi Kobayashi, Keitetsu Rokugo
Proceedings of ConMat’15 (Proceedings of the Fifth International Conference on Construction Materials)   2061-2070   Aug 2015   [Refereed]
鈴木雅人, 六郷恵哲, 小林孝一
コンクリート工学年次論文集   37(1) 937-942   Jun 2015   [Refereed]
Makoto Hisada, Koichi Kobayashi, Kenichi Horiguchi, Nobufumi Takeda, Masao Nishimura, Hiroshi Minagawa
ACF Magazine   1(1) 35-40   Jun 2015   [Refereed]
TAKADA Hiroo, ONDA Yousuke, FUJISHIRO Masaru, KOBAYASHI Koichi, ASANO Yukio, ROKUGO Keitetsu
Doboku Gakkai Ronbunshuu E   70(4) 356-369   Nov 2014   [Refereed]
?A long-term ASR-expansive HPFRCC was developed. As an application, chemical prestress was introduced into this material by restraining the ASR expansion using reinforcing bars. Uniaxial tension tests were then performed on dumbbell-shaped HPFRCC ...
Chemical Prestressing of steel Bar-Reinforced Concrete Beams Using SHCC That Retains ASR Expansion for Long Time
Keitetsu Rokugo, Hiroo Takada, Yousuke Onda, masaru Fujishiro, Koichi Kobayashi, Yukio Asano
Proceedings of SHCC3 - 3rd International RILEM Conference on Strain hardening Cementitious Composites   43-50   Nov 2014   [Refereed]
Chloride Proofing and Rebar Corrosion Proofing Performances of SHCC Having Cracks
Yuta Kojima, Le Anh Dung, Keitetsu Rokugo, and Koichi Kobayashi
Proceedings of SHCC3 - 3rd International RILEM Conference on Strain hardening Cementitious Composites   61-68   Nov 2014   [Refereed]
TAKAGI YUSUKE, FUKUSHIMA TAKAHIRO, OHATA TAKUYA, KOBAYASHI KOICHI, ROKUGO KEITETSU
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   14 61-66   Oct 2014   [Refereed]
NAKAZAWA Sato, IWASE Hiroyuki, KOBAYASHI Koichi, ROKUGO Keitetsu
J. JSCE, Ser. H   70(1) 44-53   Oct 2014   [Refereed]
?We have developed an educational tool that allows visualization of rebar corrosion with aqueous gel. Various types of rebar corrosion in concrete can be visually observed with the use of this tool, which will enhance students' understanding of th...
TASHIRO KYOHEI, OHATA TAKUYA, ASANO YUKIO, KOBAYASHI KOICHI, ROKUGO KEITETSU
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   14 121-126   Oct 2014   [Refereed]
OHATA TAKUYA, MUKAI YUUMA, OZAWA MITSUO, KOBAYASHI KOICHI, ROKUGO KEITETSU
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   14 133-140   Oct 2014   [Refereed]
Atsushi Ueno, Kenji Kawai, Koichi Kobayashi, Satoshi Tanaka
Construction and Building Materials   67 393-398   Sep 2014   [Refereed]
In Japan, demolished concrete is often recycled as crusher-run material that captures CO2 because new surface is exposed to the air. This uptake is enabled by carbonations of hydration products in hardened cement paste. The amount of extra CO2 cap...
Model Tests to Determine the Effect of ASR on the Shear Strength of RC Members and the Effectiveness of Post-Rupture Repair
Yusuke TAKAGI, Takahiro FUKUSHIMA, Takuya OHATA, Koichi KOBAYASHI and Keitetsu ROKUGO
Proceedings of the 6th International Conference of Asian Concrete Federation   499-502   Sep 2014   [Refereed]
The Effect of Cement Quantity and Fiber Type on the Reinforcement Corrosion Resisting Performance of SHCC
Masato Suzuki, Le Ahn Dung, Keitetsu Rokugo and Koichi Kobayashi
Proceedings of the 6th International Conference of Asian Concrete Federation   1114-1117   Sep 2014   [Refereed]
KOBAYASHI KOICHI, KANO YUTAKA, ROKUGO KEITETSU
土木学会論文集 E2(材料・コンクリート構造)(Web)   70(3) 320-335 (J-STAGE)   Jul 2014   [Refereed]
KOJIMA YUTA, DUNG LE ANH, ROKUGO KEITETSU, KOBAYASHI KOICHI
コンクリート工学年次論文集(CD-ROM)   36(1) ROMBUNNO.1147   Jun 2014   [Refereed]
HONJO YUSUKE, OTAKE YU, SATO ATSUSHI, SASUGA TAKASHI, KOBAYASHI KOICHI, SHOMIYA HIROO
構造工学論文集 A(CD-ROM)   60(A) ROMBUNNO.9-1   Mar 2014   [Refereed]
TAKAGI YUSUKE, FUKUSHIMA TAKAHIRO, OHATA TAKUYA, KOBAYASHI KOICHI, ROKUGO KEITETSU
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   13 413-420   Nov 2013   [Refereed]
OZAWA MITSUO, MUKAI YUUMA, TANIBE TOORU, FUMOTO TAKAYUKI, KOBAYASHI KOICHI
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   13 495-500   Nov 2013   [Refereed]
Koichi Kobayashi, Yutaka Kano and Keitetsu Rokugo
e173   Aug 2013   [Refereed]
Le Anh Dung, Koichi Kobayashi, Keitetsu Rokugo
e174   Aug 2013   [Refereed]
LE ANH-DUNG, ROKUGO KEITETSU, KOBAYASHI KOICHI
コンクリート工学年次論文集   35(1) 253-258   Jun 2013   [Refereed]
MUKAI YUUMA, OZAWA MITSUO, TANIBE TOORU, KOBAYASHI KOICHI
コンクリート工学年次論文集   35(1) 1147-1152   Jun 2013   [Refereed]
A study on methods for integrating cost and environmental impacts in the selection of repair methods for existing concrete structures
Yoshitaka Kato, Toshiya Maeda, Takefumi Shindo, Tomoaki Tsutsumi, Koichi Kobayashi, Kenji Kawai
The First International Conference on Concrete Sustainability   754-759   May 2013   [Refereed]
Visualization of CO2 uptake by demolished concrete
Atsushi Ueno, Kenji Kawai, Koichi Kobayashi, Satoshi Tanaka
The First International Conference onConcrete Sustainability   115-120   May 2013   [Refereed]
Nakazawa Sato, Iwase Hiroyuki, Kobayashi Koichi, Rokugo Keitetsu
Japanese colleges of technology education journal   (36) 303-308   Mar 2013   [Refereed]
The objective of this study is to clarify the relationship between rebar corrosion in concrete and that in thevisual educational tool by using a half-cell potential method. The visual educational tools were made with severaltypes of aqueous gel wi...
Koichi Kobayashi, Takahiro Fukushima, Keitetsu Rokugo
Proceedings of the 8th International Conference on Fracture Mechanics of Concrete and Concrete Structures, FraMCoS 2013      Mar 2013   [Refereed]
This study aims at clarifying the effects of rebar rapture caused by ASR on the mechanical performance of RC members. Rapture of tensile or shear reinforcement was simulated in RC beam specimens, which were subjected to a bending test after deteri...
Ryo Tanaka, Hiroo Takada, Yukio Asano, Koichi Kobayashi, Keitetsu Rokugo
Proceedings of the 8th International Conference on Fracture Mechanics of Concrete and Concrete Structures, FraMCoS 2013      Mar 2013   [Refereed]
Uniaxial tensile properties of a SHCC can be confirmed by simply fabricating prism specimens at the job site and molding those later into a dumbbell shape for uniaxial tension testing. Level of skill in fabricating dumbbell-shaped specimens and th...
Koichi Kobayashi, Keitetsu Rokugo
Construction and Building Materials   39 139-147   Jan 2013   [Refereed]
This paper presents a patch repair method that uses high performance fiber reinforced cement composites (HPFRCCs) to repair reinforced concrete members damaged by chloride attack. The beam specimens were deteriorated under chloride attack and then...
K. Rokugo, H. Hatano, T. Nakashima, Y. Sakaguchi, M. Yamakami, K. Kobayashi
RILEM Bookseries      Dec 2012
The authors intend to propose shock-absorbing blocks to be placed at the girder-ends of bridges with the aim of reducing the joint gaps. These blocks are made to have an effect of alleviating possible colliding forces between main girders and the ...
SHIN'YA KAZUHIDE, SATO AYUMI, ASANO YUKIO, KOBAYASHI KOICHI, ROKUGO KEITETSU
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   12 395-400   Nov 2012   [Refereed]
FUKUSHIMA TAKAHIRO, KOBAYASHI KOICHI, ROKUGO KEITETSU
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   12 495-502   Nov 2012   [Refereed]
An Application of HPFRCC and Fiber Net for Recovering Strength of RC Members Deteriorated by Chloride Induced Corrosion
Koichi Kobayashi, Shoya Asano, Ryosuke Ohashi and Keitetsu Rokugo
8th RILEM International Symposium on Fibre Reinforced Concrete (BEFIB 2012)   04-475   Sep 2012   [Refereed]
SHIKANO YU, KOBAYASHI KOICHI, ROKUGO KEITETSU
コンクリート工学年次論文集   34(2) 1000-1005   Jun 2012   [Refereed]
This paper presents results of an investigation of evaluating the bridges health degree of 54 bridges managed by Gifu Prefecture in Gifu City. Bridge health degree is statistically calculated with periodic inspection data conducted by Gifu Prefect...
Nakazawa Sato, Iwase Hiroyuki, Kobayashi Koichi, Rokugo Keitetsu
Japanese colleges of technology education journal   (35) 323-328   Mar 2012   [Refereed]
The objective of this study is to develop an educational tool that can simulates corrosion ofreinforcing bar in concrete. The visual educational tools that were made with aqueous gel andhad various factors were prepared. The distributions of half-...
K. Kobayashi, N. Banthia
Journal of Civil Structural Health Monitoring   1(No.1) 25-35   Dec 2011   [Refereed]
A novel non-destructive technique of corrosion detection in reinforced concrete based on a combination of induction heating (IH) and infrared thermography was investigated. The technique is based on the principle that corrosion products have poor ...
Application of HPFRCC as a Patching Repair Material for RC Members Exposed to Chloride Attack
Koichi Kobayashi, Yukio Asano, Keitetsu Rokugo
2nd RILEM conference on strain hardening cementitious composites (SHCC2-Rio)   173-180   Dec 2011   [Refereed][Invited]
Characterization of Multiple Fine Cracks in SHCC by Probability Distribution
Hiroo Takada, Yukio Asano, Koichi Kobayashi and Keitetsu Rokugo
2nd RILEM conference on strain hardening cementitious composites (SHCC2-Rio)   297-304   Dec 2011   [Refereed]
Fresh Properties and Mechanical Performance of Hand-Mixed Small-batch SHCC
Keitetsu Rokugo, Koichi Kobayashi, Yukio Asano, Naoharu Morii, Seung-Chan Lim, Kazuhide Shinya and Hideki Hirai
2nd RILEM conference on strain hardening cementitious composites (SHCC2-Rio)   313-321   Dec 2011   [Refereed][Invited]
Takashi Yamamoto, Michiaki Oyado, Yasuhiro Mikata, Koichi Kobayashi, Takumi Shimomura
RILEM Bookseries   5 113-124   Dec 2011
A great number of loading tests have been performed on load-carrying behaviour of RC members with the corroded reinforcing steel. However, it is difficult to find the quantitative relationship between the degree of corrosion and the loading capaci...
Effects of patch repair by HPFRCC on mechanical performances of RC member deteriorated by rebar corrosion
Koichi Kobayashi, Shoya Asano, Ryosuke Ohashi and Keitetsu Rokugo
International symposium on cement&concrete materials (ISCCM 2011)   286-294   Nov 2011   [Invited]
K. Kobayashi, R. Nakamura, K. Rokugo, S. Nakazawa
Proceedings of Concrete Solutions, 4th International Conference on Concrete Repair   369-379   Sep 2011   [Refereed]
This study aimed at developing a new non-destructive test method using Induction Heating (IH) and infrared thermography for quantitative assessment of rebar corrosion. Rebars under cover concrete were heated with an IH device, and the effects of r...
Hideaki Hatano, Masayuki Yamakami, Yuuki Sakaguchi, Koichi Kobayashi, Keitetsu Rokugo
Applied Mechanics and Materials   82 551-558   Aug 2011   [Refereed]
The girder-end gap of a bridge should preferably be narrowed from the standpoint of the durability of the expansion joint and noise reduction but is required to be widened, when seismic isolation supports are used, from the aspect of preventing co...
Frost Resistance of Precracked Concrete Specimens with HPFRCC Overlay
Takashi Nakashima, Sato Nakazawa, Takuya Ohata, Koichi Kobayashi, Keitetsu Rokugo
9th International Symposium on High performance Concrete   A5-2   Aug 2011   [Refereed]
Repair with HPFRCC of RC member deteriorated by chloride-induced corrosion
Koichi Kobayashi, Shoya Asano, Ryosuke Ohashi, Naoharu Morii, and Keitetsu Rokugo
9th International Symposium on High performance Concrete   A5-1   Aug 2011   [Refereed]
OHASHI RYOSUKE, MAEDA TOKUICHI, ASANO SHOYA, KOBAYASHI KOICHI
コンクリート工学年次論文集   33(1) 1249-1255   Jun 2011   [Refereed]
ASANO SHOYA, MAEDA TOKUICHI, OHASHI RYOSUKE, KOBAYASHI KOICHI
コンクリート工学年次論文集   33(2) 1357-1362   Jun 2011   [Refereed]
KATO YOSHIFUMI, SHIKANO YU, KOBAYASHI KOICHI, ROKUGO KEITETSU
コンクリート工学年次論文集(CD-ROM)   33(1) 893-898   Jun 2011   [Refereed]
TAKADA HIROO, ASANO YUKIO, KOBAYASHI KOICHI, ROKUGO KEITETSU
コンクリート工学年次論文集(CD-ROM)   33(1) 269-274   Jun 2011   [Refereed]
NAKAMURA RYOTA, NAKAZAWA SATO, ROKUGO KEITETSU, KOBAYASHI KOICHI
コンクリート工学年次論文集(CD-ROM)   33 1697-1702   Jun 2011   [Refereed]
K. Rokugo, H. Takada, Y. Takahashi, Y. Sakaguchi, K. Kobayashi
18th European Conference on Fracture: Fracture of Materials and Structures from Micro to Macro Scale      Dec 2010
Aiming at achieving a higher cracking strength of SHCC members reinforced by steel bars, an expansive additive whose mass ratio to the binder ranged from 0 to 10% was added to a SHCC, of which RC beams whose reinforcement ratios ranged from 1.4 to...
HATANO Hideaki, YAMAKAMI Masayuki, SAKAGUCHI Yuuki, KOBAYASHI Koichi, ROKUGO Keitetsu
Journal of Japan Society of Civil Engineers, Ser. E1 (Pavement Engineering)   66(4) 483-494   Nov 2010   [Refereed]
??Gaps between superstructures and abutment parapets should be small for increasing the life of expansion joints and for reducing noise from joints. However, to prevent the collision of superstructures with seismic-isolation bearing into parapets,...
SATO TAKASHI, KANEMATSU TAKAHIRO, ASANO SHOYA, KOBAYASHI KOICHI, ROKUGO KEITETSU
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   10 323-328   Oct 2010
TAKADA Hiroo, TAKAHASHI Yuji, SAKAGUCHI Yuuki, KOBAYASHI Koichi, ROKUGO Keitetsu
Journal of Japan Society of Civil Engineers, Ser. E1 (Pavement Engineering)   66(3) 337-347   Sep 2010   [Refereed]
??Aiming at achieving a higher cracking strength and the improvement in cracking properties of HPFRCC member reinforced by steel bars, an expansive additive whose mass ratio to the binder ranged from 0 to 10% was added to HPFRCC, of which RC beams...
Koichi Kobayashi, Takahiro Iizuka, Hoshito Kurachi, Keitetsu Rokugo
Cement and Concrete Composites   32 411-420   Jul 2010   [Refereed]
This paper regards the corrosion protection performance of High Performance Fiber Reinforced Cement Composites (HPFRCC) as a repair material. For the purpose of improving workability, the volumetric fiber content in HPFRCC was decreased from its u...
K. Kobayashi, N. Banthia
Concrete under Severe Conditions: Environment and Loading - Proceedings of the 6th International Conference on Concrete under Severe Conditions, CONSEC'10      Jun 2010   [Refereed]
In this study, a new NDT method that employs induction heating (IH) and infrared thermography camera is investigated for its applicability in the measurement of extent of corrosion of steel in concrete. Corrosion products have a very low heat cond...
Koichi Kobayashi, Hoshito Kurachi, Keitetsu Rokugo
2nd International Conference on Sustainable Construction Materials and Technologies      Jun 2010   [Refereed]
This paper aimed at clarifying the corrosion protection performance of SHCC (Strain Hardening Cement-based Composites) as a repair material. Chloride solution was sprayed on the specimens to accelerate chloride-induced corrosion of reinforcing ste...
Kobayashi Koichi, Rokugo Keitetsu
FraMCoS 7 (Fracture Mechanics of Concrete and Concrete Structures)      May 2010   [Refereed]
Distribution of corrosion onrebar caused by electrolyticcorrosion and chloride-induced corrosion
Sato Takashi, Hikita Masaya, Kurachi Hoshito, Kobayashi Koichi, Rokugo Keitetsu
   Aug 2009   [Refereed]
Improvement ofperformance of concrete against freezing and thawing actions by HPFRCC overlay
Ohata Takuya, Kato Hisaya, Yamada Yuichiro, Kobayashi Koichi, Rokugo Keitetsu
   Aug 2009   [Refereed]
The effect of corrosion distribution on mechanical performanceof reinforcing bar
Kobayashi Koichi, Matsuoka Shinichiro
   Aug 2009   [Refereed]
KURACHI SEIJIN, KATO YOSHIFUMI, KOBAYASHI KOICHI, ROKUGO KEITETSU
コンクリート工学年次論文集(CD-ROM)   31 ROMBUNNO.1051   Jun 2009
SATO TAKASHI, HIKITA MASAYA, KURACHI SEIJIN, KOBAYASHI KOICHI
コンクリート工学年次論文集(CD-ROM)   31(1) ROMBUNNO.1171   Jun 2009   [Refereed]
SAWADA KENGO, OHATA TAKUYA, KOBAYASHI KOICHI, ROKUGO KEITETSU
コンクリート工学年次論文集(CD-ROM)   31 ROMBUNNO.1181   Jun 2009
KOBAYASHI KOICHI
土木学会論文集 A(Web)   65(1) 123-135 (J-STAGE)-266   Feb 2009   [Refereed]
Chloride induced corrosion of reinforcing steel is a typical cause of deterioration of RC structure. To maintain deteriorated RC structures properly, it is essential to determine the degree of deterioration accurately. In this study, the seismic p...
MIKATA YASUHIRO, NAKAMURA EISUKE, KOBAYASHI KOICHI, KURODA ICHIRO, SHIMOMURA TAKUMI
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   8 383-390   Oct 2008

Misc

 
Koichi Kobayashi, Suvash C. Paul and Gideon P.A.G. van Zijl
A Framework for Durability Design with Strain-Hardening Cement-Based Composites (SHCC) – State-of-the-Art Report of the RILEM Technical Committee 240-FDS   147-170   2017   [Invited]
Abstract: Currently, a common use for strain-hardening cement-based composites (SHCC) is as a repair material, or for retrofitting reinforced concrete (RC) structures. This is due to SHCC being expected to have high resistance to substance penetra...
Koichi Kobayashi and Volker H. Wittmann
A Framework for Durability Design with Strain-Hardening Cement-Based Composites (SHCC) – State-of-the-Art Report of the RILEM Technical Committee 240-FDS   101-108   2017   [Invited]
Abstract: When strain-hardening cement-based composite (SHCC) with cracks is repeatedly exposed to freezing and thawing, accelerated deterioration of the SHCC, due to the
expansion of water during freezing in the cracks, may be of major concern. ...
Christian Wagner, Volker Slowik, Gideon P.A.G. van Zijl, William P. Boshoff, Suvash C. Paul, Viktor Mechtcherine and Koichi Kobayashi
A Framework for Durability Design with Strain-Hardening Cement-Based Composites (SHCC) – State-of-the-Art Report of the RILEM Technical Committee 240-FDS   27-58   2017   [Invited]
Abstract: The durability of strain-hardening cement-based materials (SHCC) is strongly influenced by the transport of different substances through the material. Since numerous fine cracks are formed in SHCC, the relationship between the crack patt...
KOBAYASHI Koichi, YAMAGUCHI Toshinobu
Concrete Journal (Tokyo. 1963)   54(2) 206-208   Feb 2016
早川 光敬, 神代 泰道, 小林 孝一,坂本淳,濱崎仁
コンクリート工学   53(9) 812-818   Sep 2015   [Invited]
石田 哲也, 小林 孝一, 睦好 宏史, 芳村学
コンクリート工学   53(9) 779-784   Sep 2015   [Invited]
Kobayashi K.
Concrete Journal (Tokyo. 1963)   53(1) 133-140   Jan 2015   [Invited]
Hisada M., Kobayashi K., Maruya T., Kawai T.
Concrete Journal (Tokyo. 1963)   52(10) 863-870   Oct 2014   [Invited]
The Japan Society of Civil Engineers launched "Research on the Processing and Effective Use of Earthquake Debris" as a key research topic in 2012. The committee in charge of this research topic was composed of concrete engineering and geotechnical...
KOBAYASHI KOICHI
Sen-ito Kogyo   69(4) 109-112   Apr 2013   [Refereed][Invited]
KAWAI K., KOBAYASHI K., UENO A., KATO Y.
Concrete Journal (Tokyo. 1963)   50(11) 1006-1013   Nov 2012   [Invited]
"Subcommittee for survey research on technology for demolition, reuse, and repair of concrete structures taking CO2 reduction into account" was set up by the Concrete Committee of the Japan Society of Civil Engineers in order to evaluate the CO2 u...
KAWAI Kenji, KOBAYASHI Koichi, UENO Atsushi, KATO Yoshitaka
セメントコンクリート   (790) 26-31   Dec 2012   [Invited]
小林 孝一
Concrete Journal (Tokyo. 1963)   50(7) 643-644   Jul 2010
KAWAI KENJI, SUGIYAMA TAKAFUMI, ICHIKAWA MAKIHIKO, IYOTA TAKESHI, ERA HIROKI, OKAMOTO SHUICHI, ONOYAMA KIICHIRO, KOBAYASHI KOICHI, WADA ICHIRO
コンクリート工学   40(12) 10-16   Dec 2002

Books etc

 
Japan's Concrete Technology
KOBAYASHI Koichi et al. (Part:Contributor, pp. 130-133, 214-217)
2014   
土木材料学
Mar 2012   ISBN:978-4-254-26162-2
建設材料実験
Mar 2011   
コンクリートを学ぶ―施工編―
Mar 2011   ISBN:978-4-8446-0764-9

Conference Activities & Talks

 
KOBAYASHI KOICHI, OKAJIMA HIROKI, ASANO TATSUO, KOJIMA SHIN'ICHI
土木学会年次学術講演会講演概要集(CD-ROM)   1 Aug 2015   
KOBAYASHI KOICHI
日本学術会議材料工学連合講演会講演論文集   27 Oct 2014   
OHATA TAKUYA, FUKUSHIMA TAKAHIRO, TAKAGI YUSUKE, KOBAYASHI KOICHI, ROKUGO KEITETSU
土木学会年次学術講演会講演概要集(CD-ROM)   1 Aug 2014   
KOBAYASHI KOICHI
日本学術会議材料工学連合講演会講演論文集   25 Nov 2013   
OZAWA MITSUO, MUKAI YUUMA, TANIBE TOORU, KOBAYASHI KOICHI
日本火災学会研究発表会概要集   3 Jun 2013   
OZAWA MITSUO, MUKAI YUUMA, TANIBE TOORU, KOBAYASHI KOICHI
セメント技術大会講演要旨(CD-ROM)   30 Apr 2013   
OTAKE YU, SASUGA AKIRA, MORIMOTO HIROAKI, MURAKAMI SHIGEYUKI, KOBAYASHI KOICHI, HONJO YUSUKE, TAKAGI AKIYOSHI
土木計画学研究・講演集(CD-ROM)   Nov 2011   
KOBAYASHI KOICHI
土木学会年次学術講演会講演概要集(CD-ROM)   1 Sep 2006   
KAMEDA YOSHIHIRO, KOBAYASHI KOICHI, ITO MUTSUMI, MIZUNO EIJI
土木学会年次学術講演会講演概要集(CD-ROM)   1 Sep 2006   
KOBAYASHI KOICHI, YAMAMOTO MASAHIRO
土木学会年次学術講演会講演概要集(CD-ROM)   20 Aug 2005   

Association Memberships

 
 

Research Grants & Projects

 
老朽化した鉄筋コンクリート物の耐荷性と耐久性のSHCCによる向上
JST: 二国間交流事業(韓国(NRF)との共同研究)
Project Year: Apr 2017 - Mar 2019    Investigator(s): KOBAYASHI Koichi
Ministry of Education, Culture, Sports, Science and Technology: Grants-in-Aid for Scientific Research(基盤研究(C))
Project Year: 2010 - 2012    Investigator(s): Koichi KOBAYASHI
This study aimed at developing a new non-destructive test method using induction heating (IH) and infrared thermography for quantitative assessment of rebar corrosion. Rebars under cover concrete were heated with an IH device, and the effects of r...
Durability of RC structure
Non-destructive test
Application of admixtures for Concrete
Durability of RC structure

Social Contribution

 
脱・災害高リスク社会 1(毎日新聞大阪本社版)にてコメント引用
[Informant]  毎日新聞社  毎日新聞  11 Jan 2010