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JCI-RILEM International Workshop on "Control of Cracking of Mass Concrete and Related Issues Concerning Early Age Cracking of Concrete Structures"

ConCrack5 24-26 April 2017 | Institute of Industrial Science, the University of Tokyo



Conference information

Details and Objective

Japan Concrete Institute(JCI) published “Guidelines for Control of Cracking of Mass Concrete” in 1986, which systematized the control technologies of thermal cracking of mass concrete in design and construction practice, considering a large influence of thermal cracking on durability of mass concrete structures. It was revised in 2008 as “Guidelines for Control of Cracking of Mass Concrete 2008” which included the advanced technologies on control of thermal cracking in material, design and construction fields in two decades since 1986. The guidelines have the following features; (1) to adopt thermal cracking probability, (2) to adopt performance based design system and to prescribe in principle three dimensional finite element method for temperature stress analysis, and (3) to prescribe design values of early age physical properties of concrete made with various types of cements. JCI mass concrete committee has disseminated the technologies of control of cracking through selling the guidelines (the number of total selling: 1100) and holding lecture meetings in order to contribute to improving quality of mass concrete structures. However, in spite of technology advancement, problems on thermal cracking arise often at the construction sites of mass concrete structures. This is due to the fact that verification on thermal cracking in design stage and appropriate measures are not taken because significance of the thermal crack control for durability and appearance is not sufficiently understood. For this reason, it is necessary to continue the activities for dispersing control technologies for thermal crack so that the significance of thermal crack control can be understood by design engineers, construction engineers and public agency's engineers.    

Establishment of estimation methods for early age properties of concrete accompanies much difficulty because behaviors of early age concrete including thermal stress and resultant thermal cracking generated in the processes of hydration of cement are complicated, and physical properties of concrete change with time. In addition to the complexity of the behaviors, it is not so easy to predict thermal cracking and thermal crack width with satisfactory accuracy because the change of climate condition at the execution sites is sometimes un-expectable and the construction quality affects the behaviors. Research works through various approaches have been performed to solve comprehensively the problem related to early age cracking.

In partnership with the French and European Research Community in Civil Engineering, IFSTTAR has been promoting research projects on thermal effects on the behaviors of early age concrete and improving control technologies of early age cracking with understanding of the behaviors by experiments, development of analytical models and advancement of numerical analysis methods. Furthermore IFSTTAR has promoted (and published in 2007) an advanced method of control of delayed ettringite deformation (DEF), which has been observed as a deterioration phenomenon in mass concrete structures. Observation of cracks probably or effectively due to DEF in France and South East Asia was reported. Prevention methods of DEF, one of primary factors of which is high temperature history, has to be investigated in the design process of mass concrete structures, where high temperature conditions develop due to heat of hydration.

  The French joint Consortium CEOS.fr, of which IFSTTAR has been an active member, has been conducting a series of international workshops; ConCrack**1, where latest information exchange and discussion on control of cracking at early age of concrete were performed. The RILEM-JCI international workshop ConCrack3 was held in Paris in March 2012 on the basis of mutual understanding between RILEM and JCI that IFSTTAR intended to enhance estimation technologies of early age behavior of concrete and JCI intended to spread the control technologies of thermal cracking of mass concrete widely with the JCI guidelines, and memorized as a unique workshop by the participants. The proceedings (RILEM PRO 85) were published by RILEM with the support of IFSTTAR as local organizer. JCI’s “Guidelines for Control of Cracking of Mass Concrete 2008” was issued and introduced for the first time in Europe.

JCI-RILEM international workshop “ConCrack5”, which will be held in April 2017 in Tokyo, is planned as a succeeding workshop to ConCrack3 and is composed of two keynote lectures from Japan and Europe, the introductions of “Guidelines for Control of Cracking of Mass Concrete 2016”, the results of research projects performed by IFSTTAR, the activities of CEOS.fr, COST TU 1404 project and mass concrete committee of RILEM, and the presentations of the papers including the latest research results on early age behaviors of concrete. Prevention and protection procedures of DEF, which has not become obvious in Japan, as well as simple equations for estimating maximum temperature of concrete will be incorporated in “Guidelines for Control of Cracking of Mass Concrete 2016” as well as design values of physical properties of early age concrete and simple equations for thermal cracking index will be enhanced. ConCrack5 will be a helpful international workshop for the researchers and the engineers in mass concrete construction field through concentrated discussions, information exchanges and mutual understandings among the participants.

**1 ConCrack 1 and 2 were held in Paris, 10-11 Dec. 2009 and 20-22 June 2011, respectively. The ConCrack 3 workshop was co-organized in Paris, France, from 15-16 March 2012, by the Japan Concrete Institute and IFSTTAR, the French Institute of Science and Technology for Transports, Development and Networks (formerly LCPC) under the auspices of RILEM and in partnership with the French National Project CEOS.fr dedicated to crack control of special concrete structures. ConCrack 4 was co-organized in Ispra, Italy, from 20-21 March 2014, by JOINT RESEARCH CENTREEuropean Commission, CEOS.fr, and DRI (Ministère de l’Ecologie, du Développement Durable et de l’Energie).


Publications

The papers consisting of keynote lectures, invited lectures and accepted general presentations will be published in workshop proceedings by JCI. RILEM will re-publish them on its website after the workshop. The general presentation papers evaluated to be excellent by Scientific Committee of CONCRACK5 will be recommended to JCI-Editorial Committee of Journal of Advanced Concrete Technology so as to be published as a special issue, while the recommended papers will be peer reviewed by the JCI-Editorial Committee. “Guidelines for Control of Cracking of Mass Concrete 2016 ” will also be published by JCI.


Registration fee

Code

The fee includes

Early Registration Until Jan. 31, 2017

Late Registration Until Apr. 5, 2017

Onsite

Member*

Reception

All conference sessions

Conference Program

Lunches for Day 1&2

Coffee breaks

Banquet on Apr. 24

JPY 40,000

JPY 45,000

JPY 45,000

Non-member

Reception

All conference sessions

Conference Program

Lunches for Day 1&2

Coffee breaks

Banquet on Apr. 24

JPY 50,000

JPY 55,000

JPY 55,000

Student**

Reception

All conference sessions

Conference Program

Lunches for Day 1&2

Coffee breaks

Banquet on Apr. 24

JPY 20,000

JPY 25,000

JPY 25,000

Accompany

Banquet on Apr. 24

JPY 5,000 JPY 6,000 JPY 7,000

 

*Applied to individual members of JCI and RILEM

**All students are requested to present their own student ID at the Conference Registration Desk.


Committee

International Advisory Committee
Role Name Affiliation Nation
1 Member Gyorgy L. BALASZ Budapest University of Technology and Economics Hungary
2 Member John GAJDA Chair of ACI207, CTL Group USA
3 Member Ole Mejlhede JENSEN Department of Civil Engineering, Technical University of Denmark Denmark
4 Member Eduardus Aloysius Bernardus KOENDERS Technical University Darmstadt Germany
5 Member Konstantin KOVLER Faculty of Civil and Environmental Engineering Technion, Israel Institute of Technology Israel
6 Member David A. LANGE Department of Civil and Environmental Engineering, the University of Illinois USA
7 Member Giuseppe MANCINI Politecnico di Torino Italy
8 Member Geert De SCHUTTER Department of Structural Engineering, Universiteit Gent Belgium
9 Member Jeffrey WEST Chair of ACI224, University of Waterloo USA
Organizing Committee
Role Name Affiliation Nation
1 Chairperson Ryoichi SATO Hiroshima University Japan
2 Co-chair François TOUTLEMONDE French Institute of Science and Technology for Transport, Development and Networks France
3 Secretary Tsutomu KANAZU CERES Inc. Japan
4 Member Bruno GODART French Institute of Science and Technology for Transport, Development and Networks France
5 Member Shunsuke HANEHARA Iwate University Japan
6 Member Toshiharu KISHI The University of Tokyo Japan
7 Member Shingo MIYAZAWA Ashikaga Institute of Technology Japan
8 Member Toshiaki MIZOBUCHI Hosei University Japan
9 Member Takafumi NOGUCHI The University of Tokyo Japan
10 Member Jean-Michel.TORRENTI French Institute of Science and Technology for Transport, Development and Networks France
11 Member Hiroshi WATANABE Public Works Research Institute Japan

Scientific Committee
Role Name Affiliation Nation
1 Chairperson Toshiaki MIZOBUCHI Hosei University Japan
2 Co-chair Bruno GODART French Institute of Science and Technology for Transport, Development and Networks France
3 Secretary Ippei MARUYAMA Nagoya University Japan
4 Secretary Makoto TANIMURA Taiheiyo Cement Corporation Japan
5 Secretary Hiroshi UEDA Railway Technical Research Institute Japan
6 Member Shingo ASAMOTO Saitama University Japan
7 Member Miguel AZENHA Civil Engineering Department, the University of Minho Portugal
8 Member Farid BENBOUDJEMA ENS Cachan France
9 Member Harald Budelmann Technische Universität Braunschweig Germany
10 Member Eduardo FAIRBAIRN RILEM, Federal University Rio de Janeiro Brazil
11 Member Shunsuke HANEHARA Iwate University Japan
12 Member Akira Hosoda Yokohana National University Japan
13 Member Keiichi IMAMOTO Tokyo Science University Japan
14 Member Tsutomu KANAZU Ceres Inc. Japan
15 Member Toshiharu KISHI The University of Tokyo Japan
16 Member Konstantin KOVLER Israel Institute of Technology Israel
17 Member Jacky MAZARS Emeritus Professor, Grenoble University France
18 Member Shingo MIYAZAWA Ashikaga Institute of Technology Japan
19 Member Maho NISHIOKA Shimizu Corporation Japan
20 Member Takafumi NOGUCHI The University of Tokyo Japan
21 Member Yuuichi OTABE Sumitomo Osaka Cement Co., Ltd. Japan
22 Member Labbe PIERRE Électricité de France France
23 Member Ryoichi SATO Hiroshima University Japan
24 Member Stéphanie STAQUET Université libre de Bruxelles Belgium
25 Member Jean-Michel.TORRENTI French Institute of Science and Technology for Transport, Development and Networks France
26 Member Francois TOUTLEMONDE French Institute of Science and Technology for Transport, Development and Networks France
27 Member Daisuke TSUKISHIMA East Japan Railway Company Japan
28 Member Yang YANG Zhejiang University of Technology China
29 Member Kousuke YOKOZEKI Kajima Corporation, Japan Japan
30 Member Hiroshi WATANABE Public Works Research Institute Japan

Local Organizing Committee
Role Name Affiliation
1 Chairperson Ryoichi SATO Hiroshima University
2 Secretary General Tsutomu KANAZU Ceres Inc.
3 Member Syunsuke HANEHARA Iwate University
4 Member Toshiharu KISHI The University of Tokyo
5 Member Shingo MIYAZAWA Ashikaga Institute of Technology
6 Member Tishiaki MIZOBUCHI Hosei University
7 Member Takafumi NOGUCHI Tha University of Tokyo
8 Member Hiroshi WATANABE Public Works Research Institute
9 Secretary Ippei MARUYAMA Nagaya University
10 Secretary Makoto TANIMURA Taiheiyo Cement Corporation
11 Secretary Hiroshi UEDA Railway Technical Research Institute
12 Secretary Kousuke YOKOZEKI Kajima Corporation

Lecture Task Group
Role Name Affiliation
1 Chief Tishiaki MIZOBUCHI Hosei University
2 Member Shingo ASAMOTO Saitama University
3 Member Yasuaki ISHIKAWA Meijyo University
4 Member Tetsushi KANDA Kajima Corporation
5 Member Ippei MARUYAMA Nagaya University
6 Member Makoto TANIMURA Taiheiyo Cement Corporation
7 Member Hiroshi UEDA Railway Technical Research Institute
8 Member Hiroshi WATANABE Public Works Research Institute

Ceneral Affairs Task Group
Role Name Affiliation
1 Chief Toshiharu KISHI The University of Tokyo
2 Member Takahiro ABE Chiyoda Corporation
3 Member Takashi HAGA Pacific Consultants Co., Ltd.
4 Member Daisuke TSUKISHIMA East Japan Railway Company
5 Member Tatsuya USUI Taisei Corporation
6 Member Shingo SAKABE
→Yoshitaka SATO
JGC Corporation
7 Member Kousuke YOKOZEKI Kajima Corporation

Information Task Group
Role Name Affiliation
1 Chief Takafumi NOGUCHI The University of Tokyo
2 Member Keiichi IMAMOTO Tokyo Science University
3 Member Masao KOJIMA Takenaka Corporation
4 Member Satoshi KOMATSU Yokohama National University
5 Member Hideaki NAKAYAMA Mitsubishi Materials Corporation
6 Member Hirokazu TANAKA Shimizu Corporation
7 Member Atsushi UENO Tokyo Metropolitan University

Event Task Group
Role Name Affiliation
1 Chief Shingo MIYAZAWA Ashikaga Institute of Technology
2 Member Shunsuke HANEHARA Iwate University
3 Member Tomoko ISHIDA Obayashi Corporation
4 Member Maho NISHIOKA Shimizu Corporation
5 Member Yuuichi OTABE Sumitomo Osaka Cement Co., Ltd.