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||MFPA Leipzig GmbH|
|Liberato||Ferrara||Italy||Politecnico di Milano|
|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|
|Steffen||Grünewald||Netherlands||Sustainable Concrete Centre|
|Hans-Dieter||Beushausen||South Africa||University of Cape Town|
|Harald||Müller||Germany||Karlsruhe Institute of Technology|
|Steffen||Grünewald||Netherlands||Sustainable Concrete Centre|
|Geert||de Schutter||Belgium||Ghent University|
|Ludger||Lohaus||Germany||Leibniz Universität Hannover|
- TG4.1 - Fibre-reinforced concrete
- TG4.2 - Ultra high-performance fibre-reinforced concrete
- TG4.3 - Structural design with flowable concrete
- TG4.4 - Aesthetics of concrete surfaces
- TG4.5 - Performance-based specifications for concrete
- TG4.6 - Constitutive laws for concretes with supplementary cementitious materials
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
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 MFPA Leipzig GmbH Pietro Gambarova Italy Politecnico di Milano Mouloud Behloul France Lafarge Stefan Greiner Germany Bilfinger + Berger AG Alain Simon France - Kai Bunje Germany - Thierry Thibaux France - Makoto Katagiri Japan - Jacques Resplendino France - Marijan Skazlic Croatia - Torsten Leutbecher Germany - Berndt Aarup Denmark - Benjamin Graybeal United States - Pierre Marchand France - Björn Frettlöhr Germany - Joost Walraven Netherlands Delft University of Technology Ekkehard Fehling Germany IBB Fehling + Jungmann Pierre Rossi France IFSTTAR Dario Redaelli Switzerland Ecole d’ingénieurs et d’architectes - Fribourg Steffen Grünewald Netherlands Sustainable Concrete Centre David Fernández-Ordóñez Switzerland fib Emmanuel Denarie Switzerland EPF Lausanne Steffen Grünewald Netherlands Sustainable Concrete Centre Marco di Prisco Italy Politecnico di Milano Nguyen Viet Tue Austria Technische Universität Graz Yasuhiko Sato Japan - Karl-Heinz Reineck Germany Private - - - - François Toutlemonde France IFSTTAR
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 MFPA Leipzig GmbH Liberato Ferrara Italy Politecnico di Milano Mouloud Behloul France Lafarge Ravindra Gettu India - Bas Obladen Netherlands Strukton Group Peter Billberg Sweden - Laetitia Martinie France - Nicolas Roussel France - Bernhard Freytag Austria - Mohamed Sonebi Ireland - Patrick Stähli Switzerland - Filipe Laranjeira Spain - Guido Bertram Germany - Andreas Leemann Switzerland - Susan Taylor Ireland - Sandra Nunes Portugal - On Spangenberg Denmark Technical University of Denmark Gregor Fischer Denmark - Tor Arne Martius-Hammer Norway SINTEF 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 Private Joaquim Barros Portugal Universidade do Minho 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 Private Steffen Grünewald Netherlands Sustainable Concrete Centre Marco di Prisco Italy Politecnico di Milano Harald Beitzel Germany Inst. für Bauverfahrens- und Umwelttechnik Yasuhiko Sato Japan - Lucie Vandewalle Belgium KULeuven
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 MFPA Leipzig GmbH Tone Anita Østnor Norway - Lluis Casals Roige Spain - Klaus-R. Goldammer Germany - Christoph Motzko Germany - Alexander Reinisch Austria - Erik Boska Germany - Antonia Pacios Alvarez Spain - Klaartje de Weerdt Norway NTNU Christian Hofstadler Austria - Karen FISCHER Fischer Germany - Nikki Cauberg Belgium WTCB-CSTC-BBRI Elisabeth Hierlein Germany FDB Ludger Lohaus Germany Leibniz Universität Hannover David Fernández-Ordóñez Switzerland fib Bryan Barragan France OCV Chambery International Maher Tadros United States - Morten Gjerde New Zealand -
TG4.5 - Performance-based specifications for concrete
Traditional requirements for constituent materials, limiting w/b-ratios and cement contents are often not applicable for modern construction and modern types of concretes. With the advancement of testing methods for fresh and hardened concrete properties, a performance-based design and specification of concrete and concrete structures is approaching and already frequently applied. However, an independent overview is still missing on how a performance-based approach can be generalised – for both mechanical and durability aspects. In a first step fib Task Group 4.5 (TG4.5) intends to provide further information in addition to the new fib Model Code for Concrete Structures 2010 (MC2010) and how performance-based specifications can be adopted for the given models and design rules.
First name Last name Country Affiliation - - - - Frank Dehn Germany MFPA Leipzig GmbH Robert Coufal Czech Republic TBG METROSTAV s.r.o. Annemarie Herrmann Germany - Joachim Juhart Austria Graz University of Technology Véronique Baroghel-Bouny France - Gert König Germany König und Heunisch Planungsgesellschaft Frank Altmann Qatar BG&E Sonja Fennis Netherlands Rijkswaterstaat Grote Projecten & Onderhoud Mark Alexander South Africa University of Cape Town Nele De Belie Belgium - Franka Tauscher Germany - Guang Ye Netherlands - Doug Hooton Canada - Joost Gulikers Netherlands Rijkswaterstaat Centre for Infrastructure Agnieszka Bigaj-van Vliet Netherlands TNO-Built Environment + Geosciences Mette Geiker Norway NTNU - Trondheim Norwegian Univ. Viktor Mechtcherine Germany Technical Univ. Dresden Alfred Strauss Austria Univ. Bodenkultur Vienna Roberto Torrent Switzerland Quali- Ti-Mat Sagl Steffen Grünewald Netherlands Sustainable Concrete Centre Michael Haist Germany Leibniz Universität Hannover(KIT) David Fernández-Ordóñez Switzerland fib Hans-Dieter Beushausen South Africa University of Cape Town Roman Wan-Wendner Austria Universität für Bodenkultur, Wien Harald Müller Germany Karlsruhe Institute of Technology Steffen Grünewald Netherlands Sustainable Concrete Centre Geert de Schutter Belgium Ghent University
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 MFPA Leipzig GmbH Guang Ye Netherlands - Doug Hooton Canada - Björn Lagerblad Sweden CBI Jeanette Visser Netherlands - Thomas Bier Germany - Steinar Helland Norway S Helland Konsult Carmen Andrade Spain Instituto Eduardo Torroja 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