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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



Program

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

23-Apr-17
Start Finish Time Contents Participants
1700 1900 120 Reception

24-Apr-17
Start Finish Time Contents Speaker
900 910 10 Opening address from chair of organising committee Ryoichi Sato
910 920 10 Welcome address from JCI president Kyuichi Maruyama
920 925 5 Encouragement message from French embasy in Japan Sébastien Codina
Keynote lecture (5 min. for discussion )
925 1005 40 Experience of Vinci Construction Company in addressing early age issues in large concrete projects Laurent Boutillon
Invited lecture (5 min. for discussion of each presentation)
1005 1035 30 Cracking due to restrained shrinkage of massive concrete structures: Results of the CEOS.fr experiments Jean-Michel TORRENTI
1035 1105 30 DEF coupled to thermal history: Recent advances François TOUTLEMONDE
1105 1135 30 The revision of the French recommendations for the prevention of delayed ettringite formation Bruno GODART
1135 1330 115 Lunch / Technical exhibition
JCI Guidelines for control of cracking of mass concrete
1330 1345 15 Outlines
1345 1405 20 Chapter 1 General and Chapter 2 Basis of Control and Prevention of Cracking Due to Heat of Hydration of Cement
1405 1435 30 Chapter 3 Planning for Control and Prevention of Cracking Due to Heat of Hydration
1435 1500 25 Chapter 4 Verification of Cracking Due to Heat of Hydration of Cement; Design values of concrete
1500 1520 20 Discussions for Outlines and Chaper 1 - Chaper 4
1520 1540 20 Break
1540 1620 40 Chapter 4 Verification of Cracking Due to Heat of Hydration of Cement; Analysis 
1620 1645 25 Chapter 5 Construction Works
1645 1700 15 Chapter 6 Inspection of Cracks Due to Heat of Hydration of Cement
1700 1730 30 Background of provisions related to DEF cracking
1730 1750 20 Discussions for Chaper 4 - Chaper 6 and Background of provisions related to DEF cracking
1810 2010 120 Bunquet All participants

25-Apr-17
Start Finish Time Contents Speaker
Keynote lecture (5 min. for discussion )
930 1010 40 Chemical expansion effect in concrete and its numerical simulation based on the mechanical energy conservation hypothesis Tadaaki TANABE
Invited lecture (5 min. for discussion of each presentation)
1010 1040 30 Progress report of mass concrete committee of RILEM Miguel AZENHA
1040 1110 30 Modeling of concrete at early age, benchmark carried out within COST TU 1404 Farid BENBOUDJEMA
1110 1140 30 Further works on concrete at early age coordinated within COST TU 1404 European project Stéphanie STAQUET
1140 1330 110 Lunch / Technical exhibition
General presentation (3 min. for discussion of each presentation)
Control of thermal effects at early age : Materials approarch
1330 1350 20 Effect of metakaolin on strength and heat of hydration of concrete Mi G. CHORZEPA
1350 1410 20 Evaluation of novel concrete mixtures for use in residential basement walls for reducing shrinkage and cracking potential Stephan DURHAM
1410 1430 20 Mechanical property modeling and thermal stress evaluation of concrete containing expansive additive Yuji MITANI
1430 1450 20 Evaluation of thermal stress behavior and DEF risk of concrete using Fly Ash cement Yuji MITANI
Thermal effects at early age : Creep evaluation
1450 1510 20 Early age deformation, its resultant stress and creep properties of concrete with and without internal curing subjected to high temperature history at an early age Yuko OGAWA
1510 1530 20 Evaluation on apparent instantaneous stiffness decrease considering the effect of creep of mass concrete based on meeasurement results of actual structures Ryoichi ASHIZAWA
1530 1550 20 Break
Control of thermal effects at early age :prediction of stress and crack width
1550 1610 20 Stress prediction in very early-age concrete subjected to temperature variation Siming LIANG
1610 1630 20 Numerical prediction of crack width in massive concrete member due to heat of hydration Ingi JANG
1630 1650 20 Study of thermal cracks in concrete structures using probability theory Masami ISHIKAWA
Control of thermal effects at early age : real structures
1650 1710 20 Investigation of stresses generated in second lining concrete of NATM Tunnels in early age Chamila K. RANKOTH
1710 1730 20 Provisions against thermal and drying shrinkage cracking in construction of prestressed concrete bridge Kengo KOROYASU
1730 1750 20 Early age thermal cracking control in mass concrete shearwalls using high strength selfconsolidating concrete Des GUO
1750 1810 20 Criteria for the maximal admissible thermal differential within a mass concrete element T. BOUCHERAT
1810 1820 10 Closing address from co-chair of organising committee François TOUTLEMONDE


*Technical exhibition will be held in parallel with lectures and oral presentations at the place close to the Convention Hall.

Third day

The technical program is arranged by the Workshop committee. In this program, a one-day technical program will be provided for attendees to visit two construction sites of civil engineering concrete structures under construction. The summaries of the structures are shown as follows.

Minimum number of participants required: 10 persons,  Maximum capacity: 40 persons

Tokyo-Gaikan Expressway JCT North Ramp Project

Tokyo-Gaikan Expressway which is a ring road of approximately 85km is under construction to ease the traffic jam and improve the environment in and around Tokyo. In this project, JCT North Ramp of the expressway which is 260m in length, 80m in width and 20-40m in depth is being built using pneumatic caisson method and open cut method.  

Liquefied Natural Gas Inground Tanks

Tokyo Electric Power Company has been building two 125,000-kl LNG (Liquefied Natural Gas) inground tanks at Futtsu Thermal Power Stations for expanding the introduction of LNG.  In these tanks, a rigid junction structure for the coupling method of wall and slab has been adopted. These are cylindrical shapes, the inner diameter and depth are 69m and 41.7m respectively, and the thicknesses of the slab and the wall are 4.5m and 1.5m.


Technical Exhibition

The Workshop will provide an opportunity for companies/organizations to display their new technology, products and services in the field related to the workshop themes during the workshop. 

The charge for exhibition is JPY 150,000 including tax for one booth with an area of 1.8 x 1.8 m,  with exhibition panels (0.9 wide x 1.5 m high) and a table (0.6 x 1.8 m), and includes the full workshop registration fee for one person.

Scheduled Companies and Groups
Name of Company or Group
太平洋セメント Taiheiyo Cement Corporation
東京大学大学院 工学系研究科 建築材料研究室 & 児玉 株式会社
The University of Tokyo & Kodama, Inc.
中日本高速道路株式会社 Central Nippon Expressway Company Limited
JCIマスコン委員会
JCI Committee on Computer Code Development for Crack Control in Massive Concrete
株式会社 ティ・エス・プランニング Total Service Planning Co. Ltd
株式会社東京測器研究所 Tokyo Sokki Kenkyujo Co.,Ltd.
大成建設 Taisei Corporation
デンカ株式会社 Denka Company Limited
JIPテクノサイエンス株式会社 JIP Techno Science Corporation
鹿島建設 Kajima Corporation

Welcome party & Banquet

 1.    Welcome Party
Welcome party will be held on April 23, 2016 at the presentation room of Institute of Industrial Science, the University of Tokyo (see access map). It will start at 5:00PM.

2.     Banquet

Banquet will be held on April 24, 2016 at “Lever son Verre Komaba” in The University of Tokyo, KomabaⅠCampus. It will start at 6:00PM (http://www.u-tokyo.ac.jp/content/400020146.pdf.  No. 17 Komaba Faculty House)