The overall motivation of fib Commission 4 (COM4) is to make theoretical and practical developments in the field of concrete and concrete technology, and to present these developments in an understandable and code-type formulated manner. COM4 positions itself at the forefront of new technologies and techniques by considering both fundamental research and practical issues.
Scope and objective of technical work
The aim of COM4 is to collect and to validate information on the properties and behaviour of concrete for structural applications subjected to various types of loading and environmental conditions. The commission focuses its attention both on traditional types of concrete, in particular under unusual conditions, and on new types of concrete and cementitious composites under all types of loading and condition. The properties of the concrete types considered should be formulated in such a way that it is possible to derive behavioural models and design recommendations for practical applications.
|First name||Last name||Country||Affiliation|
|Frank||Dehn||Germany||KIT Karlsruher Institut für Technologie|
|Liberato||Ferrara||Italy||Politecnico di Milano|
|Harald||Justnes||Norway||SINTEF Building and Infrastructure|
|Steinar||Helland||Norway||S Helland Konsult|
|Joost||Walraven||Netherlands||Delft University of Technology|
|Mette||Geiker||Norway||NTNU - Trondheim Norwegian Univ.|
|Viktor||Mechtcherine||Germany||Technical Univ. Dresden|
|Hans-Dieter||Beushausen||South Africa||University of Cape Town|
|Harald||Müller||Germany||SMP Ingenieure im Bauwesen GmbH|
|Steffen||Grünewald||Netherlands||Sustainable Concrete Centre|
|Geert||de Schutter||Belgium||Ghent University|
|Ludger||Lohaus||Germany||Leibniz Universität Hannover|
TG4.1 - Fibre-reinforced concrete
Fibre concrete is more than 50 years old and the design rules have undergone developments over the years. TG4.1 will make theoretical and practical developments in the field of fibre-reinforced concrete materials technology, rheology and materials characterisation and modelling and to present these developments in code-type formulations.
The task group collects and validates information on the behaviour of fibre-reinforced concrete materials, subjected to various types of loading and environmental conditions.
TG4.1 is currently finalising a bulletin on the background to the design rules in MC2010.
First name Last name Country Affiliation Lucie Vandewalle Belgium KULeuven David Fernández-Ordóñez Switzerland fib Frank Dehn Germany KIT Karlsruher Institut für Technologie Pierre Rossi France IFSTTAR Ravindra Gettu India Indian Institute of Technology Madras Barzin Mobasher United States Arizona State University Giovanni Plizzari Italy University of Brescia Joaquim Barros Portugal Universidade do Minho György L. Balázs Hungary Budapest Univ. of Techn. & Economics Marco di Prisco Italy Politecnico di Milano Avraham Dancygier Israel Technion-Israel Institute of Technology Gustavo Parra-Montesinos United States University of Michigan Ingemar Löfgren United Kingdom - Xavier Destree Belgium - Wolfgang Kusterle Germany OTH Regensburg Horst Falkner Germany Retired Nemkumar Banthia Canada Univ. of British Columbia Tim Soetens Belgium Sanacon Sherif Yehia United Arab Emirates -
TG4.2 - Ultra high-performance fibre-reinforced concrete
Task Group 4.2 (TG4.2) will make theoretical and practical developments for concretes with strength > 120 N/mm2 in the field of fibre-reinforced concrete materials technology, rheology and materials characterisation and modelling to present these developments in code-type formulations. Work is applicable to concrete with fibres of various types, such as steel, polymeric or combinations thereof.
The work of TG4.2 is coordinated with the work of fib TG4.1 (Fibre-reinforced concrete) that develops recommendations for conventional fibre-reinforced concrete.
First name Last name Country Affiliation Frank Dehn Germany KIT Karlsruher Institut für Technologie Pietro Gambarova Italy Politecnico di Milano Mouloud Behloul France Lafarge Stefan Greiner Germany Bilfinger + Berger AG Alain Simon France Eiffage TP Kai Bunje Germany IBB Fehling & Jungmann GmbH Thierry Thibaux France Eiffage Makoto Katagiri Japan Taiheiyo Cement Corporation Jacques Resplendino France Setec TPI Marijan Skazlic Croatia University of Zagreb Torsten Leutbecher Germany Universität Siegen Berndt Aarup Denmark CRC Technology ApS Benjamin Graybeal United States PSI/FHWA Structures Pierre Marchand France IFSTTAR Björn Frettlöhr Germany - Joost Walraven Netherlands Delft University of Technology Ekkehard Fehling Germany IBB Fehling + Jungmann GmbH Pierre Rossi France IFSTTAR Dario Redaelli Switzerland School of Engineering and Architecture - Fribourg David Fernández-Ordóñez Switzerland fib Emmanuel Denarie Switzerland EPF Lausanne Steffen Grünewald Netherlands Sustainable Concrete Centre Nguyen Viet Tue Austria Technische Universität Graz Yasuhiko Sato Japan Waseda University Karl-Heinz Reineck Germany - Michael Schmidt Germany Fehling + Jungmann GmbH François Toutlemonde France IFSTTAR Marco di Prisco Italy Politecnico di Milano
TG4.3 - Structural design with flowable concrete
Flowable concrete (highly flowable, self-compacting and/or self-levelling) has evolved from a special type to a commonly applied building material. fib Task Group 4.3 (TG4.3) considers three aspects of flowable concrete (FC) for structural design: material properties, production effects and structural boundary conditions. The flow of concrete (initiated by some vibration and/or the weight of concrete) can affect the structural characteristics of hardening or hardened concrete. The mixture composition has to be adjusted and optimised in order to obtain a high flowability. TG4.3 aims at promoting the application of flowable concrete, improving and adapting the concrete design and the production technology and its implementation in guidelines and codes.
First name Last name Country Affiliation Frank Dehn Germany KIT Karlsruher Institut für Technologie Liberato Ferrara Italy Politecnico di Milano Mouloud Behloul France Lafarge Ravindra Gettu India Indian Institute of Technology Madras Bas Obladen Netherlands Strukton Group Peter Billberg Sweden Strängbetong Laetitia Martinie France INSA Nicolas Roussel France IFSTTAR Bernhard Freytag Austria Technische Universität Graz Mohamed Sonebi Ireland Queen’s University Belfast Patrick Stähli Switzerland Concretum Construction Science AG Filipe Laranjeira Spain Univ. Politecnica de Catalunya Guido Bertram Germany Grawe + Bertram Ingenieure Andreas Leemann Switzerland EMPA Susan Taylor Ireland Queen's University Belfast Sandra Nunes Portugal University of Porto On Spangenberg Denmark Technical University of Denmark Gregor Fischer Denmark Technical University of Denmark Joost Walraven Netherlands Delft University of Technology Mette Geiker Norway NTNU - Trondheim Norwegian Univ. Terje Kanstad Norway The Norwegian Univ.of Science & Tech Henrik Stang Denmark University of Denmark Konrad Zilch Germany - Steffen Grünewald Netherlands Sustainable Concrete Centre Wolfram Schmidt Germany BAM - Bundesanstalt für - Materialforschung und -prüfung John Cairns United Kingdom Heriot-Watt University David Fernández-Ordóñez Switzerland fib Bryan Barragan France OCV Chambery International Joop Den Uijl Netherlands - Harald Beitzel Germany Inst. für Bauverfahrens- und Umwelttechnik Yasuhiko Sato Japan Waseda University Lucie Vandewalle Belgium KULeuven Joaquim Barros Portugal Universidade do Minho Marco di Prisco Italy Politecnico di Milano Tor Martius-Hammer Norway SINTEF AS
TG4.4 - Aesthetics of concrete surfaces
The notion of exposed concrete is subjective and varies according to the viewer. The motivation of fib Task Group 4.4 (TG4.4) is to show possibilities how to categorise and evaluate visible concrete surfaces and how to point out technical factors of influence.
TG4.4 will formulate a state-of-the-art technical report on how exposed concrete is defined and built. The final aim is to create a generally accepted recommendation or guidelines for exposed concrete with a homogenous appearance. This generally accepted recommendation or guidelines will be characterised by classifying exposed concrete in different categories. The limit of its objective performance will be considered as well as the consequences on the effort on-site and the planning of structural framework.
First name Last name Country Affiliation Frank Dehn Germany KIT Karlsruher Institut für Technologie Tone Anita Østnor Norway SINTEF Building and Infrastructure Lluis Casals Roige Spain Oficina tecnica d’enginyeria civil Klaus-R. Goldammer Germany Deutscher Beton- und Bautechnik-Verein e.V. Christoph Motzko Germany TU Darmstadt Alexander Reinisch Austria Doka Industrie GmbH Erik Boska Germany TU Darmstadt Antonia Pacios Alvarez Spain ETS Ingenieros Industriales - UPM Klaartje de Weerdt Norway NTNU Christian Hofstadler Austria Institut für Baubetrieb und Bauwirtschaft Karen Fischer Germany Leibniz Universität Hannover Nikki Cauberg Belgium WTCB-CSTC-BBRI Elisabeth Hierlein Germany FDB - Fachvereinigung Ludger Lohaus Germany Leibniz Universität Hannover David Fernández-Ordóñez Switzerland fib Bryan Barragan France OCV Chambery International Maher Tadros United States University of Nebraska-Lincoln Morten Gjerde New Zealand Victoria University of Wellington
TG4.6 - Constitutive laws for concretes with supplementary cementitious materials
The use of Supplementary Cementitious Materials (SCM) as binder in concrete is increasing, mainly driven by the need of the concrete industry to make concrete more environmentally friendly and in particular to meet official requirements for lower CO2 emissions. Here, it is to replace considerable amount of the high emitting Portland cement with low emitting SCM. The fib Model Code for Concrete Structures 2010 (MC2010) covers the use of SCM, but limits the materials and the amount of SCM. The overall motive of fib Task Group 4.6 (TG4.6) is to prepare the basis for an extension of the MC2010 that includes assessment of less known SCM as well as larger replacements.
TG4.6 aims to prepare a state-of-the-art report addressing the items in chapter 5.1 Materials – Concrete in the MC2010. The constitutive relations can be formulated as in, and assessed in relation to compliance with those given in MC2010.
First name Last name Country Affiliation Frank Dehn Germany KIT Karlsruher Institut für Technologie Guang Ye Netherlands Delft University of Technology Doug Hooton Canada University of Toronto Björn Lagerblad Sweden CBI Jeanette Visser Netherlands Strukton Engineering Thomas Bier Germany TU Bergakademie Freiberg Steinar Helland Norway S Helland Konsult Carmen Andrade Spain - Claus Pade Denmark Danish Technological Institute Anya Vollpracht Germany Private David Fernández-Ordóñez Switzerland fib Emmanuel Denarie Switzerland EPF Lausanne Geert de Schutter Belgium Ghent University