Motivation
fib Commission 8 (COM8) aims to identify concrete-related durability issues, consider and review current information available on the topic, and provide guidance on materials and methods that will assist in optimal durability design of new structures and restoration design of existing structures.
Scope and objective of technical work
Service life design forms one part of this and COM8 will develop rational procedures to obtain an optimal technical-economic performance of concrete structures in service and to ensure that sustainability, whole-life cost and associated through-life perspectives are taken into account as part of the process by which experience gained from practice is fed back to the design, execution, maintenance and rehabilitation stages. COM8 work will address the structural service life aspects of structures with rational strategies, procedures and criteria for design, assessment, maintenance and remediation.
COM8 work also includes review of methods for the determination of inspection frequencies as well as methods based on sound engineering principles that will provide optimal information for the durability assessment of marine structures.
Commission Chair
Deputy Chair
Co Deputy Chair
| First name | Last name | Country | Affiliation |
|---|---|---|---|
| Anders Ole Stubbe | Solgaard | Denmark | Cowi A/S |
| Steinar | Helland | Norway | S Helland Konsult |
| Aad | van der Horst | Netherlands | - |
| Carmen | Andrade | Spain | Centre Internacional de Mètodes Numèrics en l’Ènginyeria (CIMNE) |
| Carola K. | Edvardsen | Denmark | Cowi AS |
| Alberto | Meda | Italy | University of Rome “Tor Vergata” |
| Norbert | Randl | Austria | Carinthia Univ. of Applied Sciences |
| Zila | Rinaldi | Italy | University of Rome “Tor Vergata” |
| Alfred | Strauss | Austria | BOKU University |
| Roberto | Torrent | Switzerland | Quali- Ti-Mat Sagl |
| Koichi | Kobayashi | Japan | Gifu University |
| Ainars | Paeglitis | Latvia | - |
| Júlio | Appleton | Portugal | A2P Consult |
| Christoph | Gehlen | Germany | TUM School of Engineering and Design |
| Frank | Papworth | Australia | BCRC |
| Stuart | Matthews | United Kingdom | Matthews Consulting |
| David | Fernández-Ordóñez | Switzerland | fib |
| Lionel | Linger | France | Vinci Construction Grand Projets |
| Rui Miguel | Ferreira | Finland | VTT Techn. Research Centre of Finland |
| Michael | Bartholomew | United States | CH2M HILL |
| Tamon | Ueda | China | Shenzhen University |
| José | Campos e Matos | Portugal | University of Minho |
| Harshavardhan | Subbarao | India | Construma Consultancy Pvt. Ltd. |
| Joan | Casas Rius | Spain | Tech. Univ. of Catalunya, UPC-BarcelonaTech |
| Frank | Dehn | Germany | KIT Karlsruher Institut für Technologie |
| Jose | Pacheco | United States | MJ2 Consulting |
| Fuyuan | Gong | China | Zhejiang University |
| Agnieszka | Bigaj-van Vliet | Netherlands | TNO - Buildings, Infrastructures and Maritime |
| Stuart | Curtis | Australia | RTR Bridge Construction Services |
| Warren | Green | United States | Vinsi U.S. |
| Qing-feng | Liu | China | Shanghai Jiao Tong University |
| Giuseppe | Mancini | Italy | Politecnico Torino |
| Harald | Müller | Germany | SMP Ingenieure im Bauwesen GmbH |
| Brett | Pielstick | United States | Eisman & Russo |
| Muhammad Imran | Rafiq | United Kingdom | University of Brighton |
| Jean Michel | Torrenti | France | Univ Gustave Eiffel |
| François | Toutlemonde | France | Université Gustave Eiffel |
| Stefanie | Von Greve-Dierfeld | Switzerland | TFB Technology and Research for Concrete Structures |
| Joost | Walraven | Netherlands | Dutch fib Delegation |
| Mouna | BOUMAAZA | France | Vinci Construction |
| Eduardo | Julio | Portugal | Instituto Superior Tecnico, Universidade de Lisboa |
| Ueli | Angst | Switzerland | ETH Zurich |
| Kefei | Li | China | - |
| Amir | Rahimi | Germany | Bundesanstalt für Wasserbau |
| Manu | Santhanam | India | Department of Civil Engineering |
| Monica | Santamaria-Ariza | Portugal | University of Minho |
| Dan | Georgescu | Romania | Techn. Univ. of Civil Engineering |
| Hans-Dieter | Beushausen | South Africa | University of Cape Town |
- TG8.1 - Model technical specification for repairs and interventions
- TG8.4 - Life cycle cost (LCC) - Design life and/or replacement cycle
- TG8.8 - Design approaches
- TG8.9 - Deterioration Mechanisms Related to Corrosion
- TG8.11 - Testing and Monitoring
- TG8.12 - Deterioration mechanisms related to other phenomena
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TG8.1 - Model technical specification for repairs and interventions
Task Group 8.1 has prepared a Guide (to good practice) on protection, repair, and strengthening techniques for concrete structures. Given the guide's extensive scope, it has been divided into two publications: bulletin 102, which addresses protection and repair methods, and bulletin 103, which focuses on strengthening methods. The chapters aim to provide practical guidelines and illustrative case studies to support the application of the pre-normative specifications in fib Model Code 2020.
For each protection, repair and strengthening method addressed in the Guide, readers have a description of when to adopt it, which materials and systems are required, which techniques are available, and what kind of equipment is needed. It then presents a summary of stakeholders’ roles and qualifications, design guidelines referring to most relevant codes and references, the intervention procedure, quality control measures and monitoring and maintenance activities.
A technical report titled “Restoring Reinforcement Passivity Through Replacement of Concrete Cover” is currently under review by members of Commission 8. Upon the publication of this report, Task Group 8.1 will have fulfilled its objectives, leading to its disbandment.
First name Last name Country Affiliation Irina Stipanovic Oslakovic Netherlands University of Twente Anders Ole Stubbe Solgaard Denmark Cowi A/S Carola K. Edvardsen Denmark Cowi AS Júlio Appleton Portugal A2P Consult Toyoaki Miyagawa Japan - Frank Papworth Australia BCRC John Cairns United Kingdom Heriot-Watt University David Fernández-Ordóñez Switzerland fib Shoji Ikeda Japan Hybrid Research Inst. Inc. Michael Bartholomew United States CH2M HILL Eduardo Cavaco Portugal Faculdade de Ciências e Tecnologia, Universidade NOVA de Lisboa José Manuel de Sena Cruz Portugal University of Minho Koichi Kobayashi Japan Gifu University João Ramoacorreia Portugal Instituto Superior Técnico, University of Lisbon Constantinos Repapis Greece University of West Attica Meini Su United Kingdom University of Manchester Takashi Habuchi Japan Toa Corporation Mercedes Sánchez Moreno Spain Universidad de Córdoba André Monteiro Portugal National Laboratory for Civil Engineering Harshavardhan Subbarao India Construma Consultancy Pvt. Ltd. Lojze Bevc Slovenia ZAG Slovenije Brett Pielstick United States Eisman & Russo Stephanos Dritsos Greece University of Patras Andreas Lampropoulos United Kingdom University of Brighton Ainars Paeglitis Latvia - Etsuji Kikuta Japan Civil Engineering Research Institute for Cold Region On Moseley Greece Private David Smith United Kingdom Atkins Takao Ueda Japan University of Tokushima Christos Giarlelis Greece Equidas Consulting Engineers Nicholas Kyriakides Cyprus Cyprus University of Technology Luís Correia Portugal University of Minho Stavroula (S.J.) Pantazopoulou Canada The Lassonde Faculty of Engineering, York University Sofia Ribeiro Portugal Laboratório Nacional de Engenharia Civil, LNEC Theodoros Rousakis Greece Democritus University of Thrace Norbert Randl Austria Carinthia Univ. of Applied Sciences Christoph Czaderski-Forchmann Switzerland EMPA, Structural Engineering Mark Verbaten Netherlands ABT bv Jan Laco United Kingdom Atkins Thanasis Triantafillou Greece University of Patras Maurizio Guadagnini United Kingdom University of Sheffield Renata Kotynia Poland Lodz University of Technology Eva Oller Ibars Spain Technical University of Catalonia José Paul Costa Portugal STAP, SA Raquel Fernandes Paula Portugal STAP, S.A. António Costa Portugal Instituto Superior Técnico Emmanuel Ferrier France Université Lyon 1 Eftychia Apostolidi Germany Donges SteelTec GmbH Xavier Hallopeau France SECCO Corrosion Consulting Jakob Kunz Liechtenstein Hilti AG Liberato Ferrara Italy Politecnico di Milano Francesco Bencardino Italy University of Calabria Véronique Bouteiller France University Gustave Eiffel Alejandro Mateos Argentina National University of Northwest of Buenos Aires - UNNOBA Eduardo Julio Portugal Instituto Superior Tecnico, Universidade de Lisboa Sylvia Kessler Germany Helmut-Schmidt-University/ University of the Federal Armed Forces Hamburg -
TG8.4 - Life cycle cost (LCC) - Design life and/or replacement cycle
The work of TG8.4 comprises the preparation of a state-of-the-art report on LCC including the following:
- A flow chart for life cycle cost analyses;
- Examples and/or case studies concerning life cycle cost evaluations of design strategies,including narratives and consequences of the favoured strategy;
- A risk analysis covering costs and benefits;
- Identification of hazard scenarios (weak points);
- Discussion on the value added by the LCC analyses including:
- Design;
- Inspection;
- Testing;
- Monitoring;
- Birth Certificate;
- Inspectability;
- Interventions.
- Reference to relevant fib documents.
First name Last name Country Affiliation Irina Stipanovic Oslakovic Netherlands University of Twente Anders Ole Stubbe Solgaard Denmark Cowi A/S Zila Rinaldi Italy University of Rome “Tor Vergata” Alfred Strauss Austria BOKU University David Fernández-Ordóñez Switzerland fib Frank Papworth Australia BCRC José Campos e Matos Portugal University of Minho Joan Casas Rius Spain Tech. Univ. of Catalunya, UPC-BarcelonaTech Hiroshi Akiyama Japan Tokyo Soil Research CO., LTD Stefania Arangio Italy Sapienza University of Rome Colin Caprani Australia Monash University Amr El-Dieb United Arab Emirates United Arab Emirates University Rui Miguel Ferreira Finland VTT Techn. Research Centre of Finland Dan Frangopol United States Lehigh University Joost Gulikers Netherlands Rijkswaterstaat Centre for Infrastructure Poul Linneberg Denmark COWI A/S Snezana Masovic Serbia University of Belgrade Drahomir Novak Czech Republic Technical University of Brno Nader M Okasha Saudi Arabia University of Hail, Hayil Xin Ruan China Tongji University Mohammed Safi Sweden Royal Institute of Technology (KTH) Mauricio Sanchez-Silva Colombia Universidad de Los Andes M. Semih Yücemen Turkey Middle East Technical University Ali Akbar Nezhad Australia UNSW Australia Sandra Škarić Palić Croatia Infraplan -
TG8.8 - Design approaches
Throughout durability design there are a number of common inputs that should be handled in a consistent approach, e.g. reliability, cracking, exposure risk assessment, verification approaches.
This Task Group will maintain approaches that are consistent across different materials and durability design approaches consistency and provide liaison with other Commissions to ensure consistency across all aspects of Model Code.
The scope:
- This Task Group shall investigate various aspects that have a common impact on modelling of deterioration mechanisms but the TG is not directly involved in the mechanisms or materials.
- Many of these items are fundamental to all aspects of structural design and cannot be considered durability issues alone. However, the issues are key to durability design.
The work in TG8.8 is currently carried out in the Working Groups below.
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WP8.8.1 - Durability planningDuring the MC2020 work it was proposed to give a complete overview of all activities related to durability planning of a project. Presentations on formal durability planning were given by Rodney Paull to TG10.1 and COM8. This resulted in current draft section 27.6 (minor comments in 35.6 and 38.1.2) in draft MC2020. An initiative has been taken to work out supporting materials to MC2020 on these matters.The WP will start its work in autumn 2022 and depends on the content development in MC2020.
First name Last name Country Affiliation Rodney Paull Australia Member Concrete Institute of Australia (CIA), Chair CIA Durability Technical Committee; ACI 201 liaison member for CIA; ACI 321 liaison member David Fernández-Ordóñez Switzerland fib Stuart Matthews United Kingdom Matthews Consulting Frank Papworth Australia BCRC -
WP8.8.2 - ULS verification under chloride- and carbonation-induced deteriorationThe reinforcement corrosion process is traditionally divided into two time periods: the initiation period and the propagation period. With respect to the former, generally accepted models are available in e.g. the fib Bulletin 34 and MC2010, while for the latter no generally accepted model is available. Different types of models for the propagation phase have been proposed in literature, e.g. based on empirical data or based on the resistivity of concrete, but these are not yet fully incorporated in the assessment of existing structures, and there is a lack of the consistent treatment of the associated uncertainties. Reinforcement corrosion causes a number of interacting damage modes, which have an impact on the corrosion progress itself and on the component’s structural behaviour: overall/local reduction of the rebar’s effective cross-section, expansive nature of the corrosion product causing internal stresses, concrete cracking and spalling, degradation of the bond and reduction of ductility of the reinforcement steel.The developments in this working group focusses both on new structures (i.e. when relating to the quantitative estimation of time-dependent behavior accounting for the propagation phase, taking avoidance measures for durability problems, assessing the need for redundancy, etc.) and on the assessment/rehabilion of existing structures (i.e. performing time-dependent ULS and SLS verification for the remaining or desired extended service life in case chloride- and carbonation-induced corrosion materialized).
First name Last name Country Affiliation Robby Caspeele Belgium Ghent University David Fernández-Ordóñez Switzerland fib Diego Lorenzo Allaix Netherlands TNO Neitherlands Carmen Andrade Spain Centre Internacional de Mètodes Numèrics en l’Ènginyeria (CIMNE) Beatrice Belletti Italy Univ. degli Studi di Parma - Engineering and Architecture Agnieszka Bigaj-van Vliet Netherlands TNO - Buildings, Infrastructures and Maritime Wouter Botte Belgium Ghent University Joan Casas Rius Spain Tech. Univ. of Catalunya, UPC-BarcelonaTech Dario Coronelli Italy Politecnico di Milano Gerrie Dieteren Netherlands TNO Joost Gulikers Netherlands Rijkswaterstaat Centre for Infrastructure Steinar Helland Norway S Helland Konsult Frank Papworth Australia BCRC Miguel Prieto Sweden RISE Research Institutes of Sweden Raphael Steenbergen Netherlands TNO Structures and Safety Miroslav Sykora Czech Republic Czech Technical University in Prague, Klokner Institute Peter Tanner Spain Cesma Ingenieros, SL Stefanie Von Greve-Dierfeld Switzerland TFB Technology and Research for Concrete Structures David Izquierdo Lopez Spain Universidad Politécnica de Madrid Simone Ravasini Italy University of Parma Constantijn Martens Belgium KU Leuven Mattia Anghileri Italy Politecnico di Milano Fabio Biondini Italy Politecnico di Milano Aleš Mezera Czech Republic Klokner Institute CTU in Prague Chihiro Yoshii Italy - Karel van den hende Belgium Ghent University -
WP8.8.3 - Exposure ZonesThe original aim of fib TG WP was to critically review existing global standards and recommendations for exposure categories for concrete structures, highlight shortcomings in the existing approaches and, where required, propose updated exposure categories for inclusion in MC2020. This has been completed in 2021.The WP has developed an updated table of exposure classes for inclusion in MC2020. A supporting paper was published in Structural Concrete in March 2021. WP3 intends to expand the supporting paper into a Bulletin.
First name Last name Country Affiliation Joanitta Ndawula South Africa University of Cape Town David Fernández-Ordóñez Switzerland fib Ueli Angst Switzerland ETH Zurich Emilio Bastidas-Arteaga France Universite de Nantes Hans-Dieter Beushausen South Africa University of Cape Town Steinar Helland Norway S Helland Konsult Sylvia Kessler Germany Helmut-Schmidt-University/ University of the Federal Armed Forces Hamburg Lionel Linger France Vinci Construction Grand Projets Beatriz Martin-Perez Canada - Frank Papworth Australia BCRC Manu Santhanam India Department of Civil Engineering Miroslav Sykora Czech Republic Czech Technical University in Prague, Klokner Institute Alice Titus South Africa Bakera University of Cape Town -
WP8.8.4 - Durability of Eco-efficient concretesDurability properties of new materials (clinker reduced cements and concretes, binders and concretes with recycled materials) are not yet systematically collected and summarized for their general application for durable and sustainable reinforced concrete structures.Durability properties of new materials are often tested with different testing protocols.Rules for using different testing protocols in durability design (SLD) and Life Cycle Assessment (LCA) is often missing.The consequences of different testing protocols on SLD & LCA are usually unknown. Current SLD is mainly based on the long-term performance of plain cement. New materials may show different long-term performance under current and future exposure or natural testing condition. These differences are currently neglected.The application of durability design in practical cases for example cracked concrete (can healing be expected with clinker optimized binders?), corners or where sealings, insulations or coatings are applied are missing.STAR on the assessment of eco-efficiency has not been prepared yet and consequently recommendations / comparisons of different approaches are missing.Keywords should / could be Clinker efficient binders, eco efficient concretes, recycled concrete and binders, durability design, service life design, life cycle assessment, global warming potential
First name Last name Country Affiliation Stefanie Von Greve-Dierfeld Switzerland TFB Technology and Research for Concrete Structures David Fernández-Ordóñez Switzerland fib Magdalena Janota United Kingdom - Ueli Angst Switzerland ETH Zurich Mouna BOUMAAZA France Vinci Construction Nuno Ferreira United Kingdom Arup Steinar Helland Norway S Helland Konsult Takeshi IYODA Japan Department of Civil Engineering Siham Kamali-Bernard France Institut National des Sciences Appliquées (INSA-Rennes) Sylvia Kessler Germany Helmut-Schmidt-University/ University of the Federal Armed Forces Hamburg Qing-feng Liu China Shanghai Jiao Tong University José Campos e Matos Portugal University of Minho Manu Santhanam India Department of Civil Engineering Elisabete Teixeira Portugal - Neven Ukrainczyk Germany Technical University of Darmstadt Junjie Wang China - Carola K. Edvardsen Denmark Cowi AS Fabrizio Moro Switzerland - Nele De Belie Belgium - Tim Van Mullem Belgium Ghent University Elke Gruyaert Belgium KU Leuven Jeanette Visser Netherlands Strukton Engineering Mette Geiker Norway NTNU - Trondheim Norwegian Univ. Eduardo Julio Portugal Instituto Superior Tecnico, Universidade de Lisboa Joachim Juhart Austria Graz University of Technology Fragkoulis Kanavaris United Kingdom Arup Jose Alexandre Bogas Portugal Universidade de Lisboa Will Gates Australia Deakin University Christian Paglia Switzerland - Hanne Vanoutrive Belgium Faculty of Engineering Technology Frank Dehn Germany KIT Karlsruher Institut für Technologie Bruno Huet France - B. J. Wigum Iceland Mannvit Reykjavik António Costa Portugal Instituto Superior Técnico Dan Georgescu Romania Techn. Univ. of Civil Engineering Rafaela Eckhardt Brazil -
First name Last name Country Affiliation Philipp Bamforth United Kingdom Construction Consultancy Jonathan Mai-Nhu France CERIB Raymond Ian Gilbert Australia School of Civil and Environmental Engineering Konstantin Kovler Israel Technion - Israel Institute of Technology Stefanie Von Greve-Dierfeld Switzerland TFB Technology and Research for Concrete Structures Steinar Helland Norway S Helland Konsult François Toutlemonde France Université Gustave Eiffel David Fernández-Ordóñez Switzerland fib Lionel Linger France Vinci Construction Grand Projets Frank Papworth Australia BCRC Michael Bartholomew United States CH2M HILL Hans-Dieter Beushausen South Africa University of Cape Town Stuart Curtis Australia RTR Bridge Construction Services Jean Michel Torrenti France Univ Gustave Eiffel Agnieszka Bigaj-van Vliet Netherlands TNO - Buildings, Infrastructures and Maritime Joanitta Ndawula South Africa University of Cape Town Stuart Matthews United Kingdom Matthews Consulting Rodney Paull Australia Member Concrete Institute of Australia (CIA), Chair CIA Durability Technical Committee; ACI 201 liaison member for CIA; ACI 321 liaison member Dan Georgescu Romania Techn. Univ. of Civil Engineering Robby Caspeele Belgium Ghent University -
TG8.9 - Deterioration Mechanisms Related to Corrosion
TG8.9 will investigate models for the following deterioration processes: Rebar Corrosion Initiation; Rebar Corrosion Propagation; Abrasion, Erosion and Cavitation; Freeze Thaw Attack; Leaching; Water and Water Vapour Migration and Chemical Attack.
In MC2010 and Bulletin 34, some of these mechanisms have only loosely defined models and some have no models. MC2010 also has limited advice for exposure classes, performance tests, deemed to satisfy requirements and avoidance approaches.
The scope:
- This Task Group shall investigate prediction tools (models)
- Derive revised design rules, which ensure sufficient durability close to broadly accepted reliability levels of limit states identified in TG8.8 and to be considered in TG8.9 and TG3.4
- The TG will provide specific input into MC2020 but is expected to continue as a COM8 TG to continuously develop the solutions for the issues listed.
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WP8.9.1 - Corrosion initiationWP 8.9.1 will deal with models on corrosion initiation by carbonation and chloride penetration. These models have been updated for MC2020 in spite of which there are subject needing further development from the basic and practical point of view. Thus, in the chloride case, aspects as the environmental concentration of chlorides, the evolution of the chloride profile with time, or the variation of surface chloride concentration are aspects that need much further study for more accurate predictions.With respect to carbonation, what need further elaboration is how to characterize the moisture in the environment and its impact in the concrete humidity, essential aspect for the active corrosion.Scope
- This WP shall develop prediction tools (models) more accurate than present ones. Also, how to obtain the correct input parameters for the model, either of the environment or of the material.
- The discussion should end in revised design rules, in particular with the probabilistic treatment The WP will provide specific input for the continuous updating of MC2020.
First name Last name Country Affiliation Frank Papworth Australia BCRC Federica Lollini Italy Politecnico di Milano Rui Miguel Ferreira Finland VTT Techn. Research Centre of Finland Amir Rahimi Germany Bundesanstalt für Wasserbau David Fernández-Ordóñez Switzerland fib Juan Mauricio Lozano Valcarcel Germany Technical University of Munich Carmen Andrade Spain Centre Internacional de Mètodes Numèrics en l’Ènginyeria (CIMNE) Matteo Gastaldi Italy Politecnico of Milano Joost Gulikers Netherlands Rijkswaterstaat Centre for Infrastructure Fabrizio Moro Switzerland - Michael Raupach Germany RWTH Aachen University Sylvia Kessler Germany Helmut-Schmidt-University/ University of the Federal Armed Forces Hamburg Steinar Helland Norway S Helland Konsult Roberto Torrent Switzerland Quali- Ti-Mat Sagl Bruno Huet France - Qing-feng Liu China Shanghai Jiao Tong University Tamon Ueda China Shenzhen University Mike Otieno South Africa Wits Edoardo Proverbio Italy University of Messina, Italy Joan Casas Rius Spain Tech. Univ. of Catalunya, UPC-BarcelonaTech Muhammad Imran Rafiq United Kingdom University of Brighton Onur Çevik Turkey - José Campos e Matos Portugal University of Minho Inam Khan Australia BCRC Forood Torabian Isfahani Italy Lombardi Group Lars-Olof Nilsson Sweden Chalmers University Malene Thostrup Pedersen Norway Norwegian University of Science and Technology Lionel Linger France Vinci Construction Grand Projets -
WP8.9.2 - Corrosion PropagationWP 8.9.2 was having meetings until end of 2019 just before the pandemia. The subjects that were treated were: the corrosion propagation model, the time to cracking due to the oxide generation in the first stages of corrosion and the corrosion produced in the zones were flexural cracks exist. Proceedings with the summaries of the presentations was published by Ifsttar (now Gustave Eiffel University)- Paris where the workshop was held.From 2020 no meetings were organized due to the efforts were concentrated in the incorporation of the corresponding chapters to MC2020.Scope
- This WP will deal with models on corrosion propagation. This subject was not treated in detail by the MC2010 but has been incorporated into MC2020 due to it deals with new and existing structures.
- The propagation model however needs further development for the correct selection of the model input parameters in the aspect to have not only average values in each exposure class but also for more particular environments. This would need the collection of data and the development of a procedure on how to deduce these input parameters.
- Other aspects needed further development is the statistical treatment and the models for calculating the “deterioration limit state” as defined in MC2020.
- Also, will be revised the design rules in the MC2020, in particular the adequacy to the LoA there defined and the statistical and spatial variations.
- The WP will provide specific input for the continuous updating of MC2020.
First name Last name Country Affiliation Carmen Andrade Spain Centre Internacional de Mètodes Numèrics en l’Ènginyeria (CIMNE) David Fernández-Ordóñez Switzerland fib Sylvia Kessler Germany Helmut-Schmidt-University/ University of the Federal Armed Forces Hamburg Qing-feng Liu China Shanghai Jiao Tong University Lars-Olof Nilsson Sweden Chalmers University Miguel Prieto Sweden RISE Research Institutes of Sweden Amir Rahimi Germany Bundesanstalt für Wasserbau Filipe Pedrosa Netherlands TNO Edgar Bohner Finland VTT Technical Research Centre of Finland Federica Lollini Italy Politecnico di Milano Frank Papworth Australia BCRC Véronique Bouteiller France University Gustave Eiffel David Izquierdo Lopez Spain Universidad Politécnica de Madrid Radhakrishna Pillai India Indian Institute of Technology Madras Tamon Ueda China Shenzhen University Joost Gulikers Netherlands Rijkswaterstaat Centre for Infrastructure Michael Raupach Germany RWTH Aachen University Stefanie Von Greve-Dierfeld Switzerland TFB Technology and Research for Concrete Structures Bruno Huet France - Forood Torabian Isfahani Italy Lombardi Group Mike Otieno South Africa Wits Edoardo Proverbio Italy University of Messina, Italy Muhammad Imran Rafiq United Kingdom University of Brighton Fabio Bolzoni Italy Politecnico Milano Pedro Castro Mexico CINVESTAV Onur Çevik Turkey - Teresa E Chen China - Juan J. Muñoz Spain SAFECOR -
WP8.9.3 - Chloride ThresholdTG 8.9.3 has prepared a background document for MC2020. It is a state of the art on the different perspectives of the chloride threshold.It also prepared a background document on stainless steels and galvanized steel. The document contains recommendations for cover depths in different exposure classes for corrosion resistant barsScope
- This WP will discuss the subject of the corrosion onset due to chlorides and will try to update the knowledge,
- Also will gather information on corrosion resistant bars as means for avoidance of corrosion
- Derive revised design rules and recommended cover depths for teh different types of bars,
- Will make examples and case studies of application
First name Last name Country Affiliation Federica Lollini Italy Politecnico di Milano David Fernández-Ordóñez Switzerland fib Frank Papworth Australia BCRC Carmen Andrade Spain Centre Internacional de Mètodes Numèrics en l’Ènginyeria (CIMNE) Ueli Angst Switzerland ETH Zurich Matteo Gastaldi Italy Politecnico of Milano Fabrizio Moro Switzerland - Michael Raupach Germany RWTH Aachen University Amir Rahimi Germany Bundesanstalt für Wasserbau Radhakrishna Pillai India Indian Institute of Technology Madras Joost Gulikers Netherlands Rijkswaterstaat Centre for Infrastructure Bruno Huet France - Stefan L. Burtscher Austria Technical University Vienne Mine Kurtay Yıldız Turkey Sakarya University Gro Markeset Norway Oslomet Rebecca Newby United Kingdom Northeastern University London Javier Sanchez Spain Spanish National Research Council -
WP8.9.4 - Durability of steel Fiber reinforced Concrete (SFRC)WP 8.9.4 had very little activity in the past. It will gather information of the durability of steel fiber reinforced concrete and how the possible corrosion of the fibers will affect the structural capacity. The fibers can bee made of bare steel, stainless or galvanized steel. It will be in coordination with the WP dealing with rules of design for SFRC.Scope
- This WP shall develop guidance on how to deal with the corrosion of the fibers due to carbonation and chlorides from a structural point of view. It will try to propose modelling of the advance of the corroded zone, and which will eb the “sacrificial thickness” in the different exposure classes.
- Also the WP will study the impact of the presence of the fibers in the flexural crack widths and hoe the possible corrosion will affect them.
- Derive revised design rules, in particular with the probabilistic treatment The WP will provide specific input for the continuous updating of MC2020.
First name Last name Country Affiliation David Fernández-Ordóñez Switzerland fib Antonio Conforti Italy University of Brescia Raul Luis Zerbino Argentina LEMIT-CIC Carlos Gil Berrocal Sweden Chalmers University of Technology Albert De la Fuente Spain Universitat Politècnica de Catalunya Carmen Andrade Spain Centre Internacional de Mètodes Numèrics en l’Ènginyeria (CIMNE) Carola K. Edvardsen Denmark Cowi AS Harshavardhan Subbarao India Construma Consultancy Pvt. Ltd. Juan J. Muñoz Spain SAFECOR Teresa E Chen China - Elena Vidal Sarmiento Spain Bekaert Laura Rossi Germany Karlsruhe Institute of Technology (KIT) Yvan Thiebaut France Vinci Construction Nicoletta Russo Italy Lombardi Ingegneria Miguel Prieto Sweden RISE Research Institutes of Sweden
First name Last name Country Affiliation Michael Bartholomew United States CH2M HILL Carmen Andrade Spain Centre Internacional de Mètodes Numèrics en l’Ènginyeria (CIMNE) David Fernández-Ordóñez Switzerland fib Akio Kasuga Japan Sumitomo Mitsui Construction Co., Ltd Ueli Angst Switzerland ETH Zurich Joost Gulikers Netherlands Rijkswaterstaat Centre for Infrastructure Philipp Bamforth United Kingdom Construction Consultancy Muhammed Basheer United Kingdom University of Leeds Edgar Bohner Finland VTT Technical Research Centre of Finland Gabriella Bolzon Italy Politecnico di Milano Véronique Bouteiller France University Gustave Eiffel Dario Coronelli Italy Politecnico di Milano Carola K. Edvardsen Denmark Cowi AS Rui Miguel Ferreira Finland VTT Techn. Research Centre of Finland Nuno Ferreira United Kingdom Arup Xavier Hallopeau France SECCO Corrosion Consulting Steinar Helland Norway S Helland Konsult Bruno Huet France - Fritz Hunkeler Switzerland TFB AG David Izquierdo Lopez Spain Universidad Politécnica de Madrid Siham Kamali-Bernard France Institut National des Sciences Appliquées (INSA-Rennes) Sylvia Kessler Germany Helmut-Schmidt-University/ University of the Federal Armed Forces Hamburg Lionel Linger France Vinci Construction Grand Projets Qing-feng Liu China Shanghai Jiao Tong University Federica Lollini Italy Politecnico di Milano Koichi Maekawa Japan Yokohama National University Jonathan Mai-Nhu France CERIB Elisabeth Marie-victoire France Laboratoire de Recherche des Monuments Historiques Fabrizio Moro Switzerland - Simon Fjendbo Denmark DTI - Danish Technological Institute Maria Nilsson Sweden Luleå Universitetsbibliotek Mike Otieno South Africa Wits Jose Pacheco United States MJ2 Consulting Frank Papworth Australia BCRC Miguel Prieto Sweden RISE Research Institutes of Sweden Miguel Pedrosa Ferreira Portugal - Muhammad Imran Rafiq United Kingdom University of Brighton Amir Rahimi Germany Bundesanstalt für Wasserbau Michael Raupach Germany RWTH Aachen University Manu Santhanam India Department of Civil Engineering Roberto Torrent Switzerland Quali- Ti-Mat Sagl Jean Michel Torrenti France Univ Gustave Eiffel François Toutlemonde France Université Gustave Eiffel Jairo Andrade Brazil Graduate Program in Materials and Engenheering Technology Filipe Pedrosa Netherlands TNO Onur Çevik Turkey - Juan Mauricio Lozano Valcarcel Germany Technical University of Munich -
TG8.11 - Testing and Monitoring
Durability design of concrete structures may incorporate a number of performance-based requirements depending on the deterioration mechanisms and exposure conditions to consider. While exposure definitions and performance-based requirements are dealt with in other fib TG’s, well documented test procedures for relevant materials properties are needed for support of the durability design and subsequent quality assurance. This includes well-founded probabilistic definitions for those properties.
The objective of Task Group 8.11 is to provide guidance on test methods and corresponding acceptance criteria and testing frequencies concerning quality assurance of concrete production. Furthermore, the objective is to link performance-requirements of concrete as yielded from durability design with the execution. For the latter, all stages of concrete production, i.e. pre-testing in the laboratory, trial testing in laboratory and on-site, and testing of running production are considered.
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WP8.11.1 - Testing of New ConcreteDurability design of concrete structures may incorporate a number of performance-based requirements depending on the deterioration mechanisms and exposure conditions to consider. While exposure definitions and performance-based requirements are dealt with in other fib TG’s and WP’s, well documented test procedures for relevant materials properties are needed for support of the durability design and subsequent quality assurance. This includes well-founded probabilistic definitions for those properties.Scope
- The objective of WP is to provide guidance on test methods and corresponding acceptance criteria and testing frequencies concerning quality assurance of concrete production.
- Furthermore, the objective is to link performance-requirements of concrete as yielded from durability design with the execution. For the latter, all stages of concrete production, i.e. pre-testing in the laboratory, trial testing in laboratory and on-site, and testing of running production are considered.
- As part of this process, several Webinars are held by different concrete experts on testing methods and procedures performed/experienced in different countries worldwide (e.g. Germany, Switzerland, China, Canada).
- The WP shall undertake a review of relevant test methods for assurance of concrete quality, including a review of their applicability, replicability and feasibility. Based on that review, feasible test methods are proposed.
First name Last name Country Affiliation Franziska Schmidt France Université Gustave Eiffel, MAST/EMGCU David Fernández-Ordóñez Switzerland fib Anders Ole Stubbe Solgaard Denmark Cowi A/S -
WP8.11.2 - Monitoring of ConcreteAs the focus of WP2 of TG8.11 is to provide an updated state-of-the-art report on in situ testing methods applicable on existing structures, in view of assessing their present condition and of allowing a prognosis of their remaining (residual) service life, WP3 presents similar objectives, but based not on point-in-time in situ testing, but on mid and long-term methods and techniques for durability monitoring. The aim is not the monitoring of the overal structural performance (which is the objective of other WP ́s as in Commission 3), but the monitoring of the material performance along the structure ́s service life by the deployment of permanent sensors that allow for a continuous monitoring of the condition state of the concrete.ScopeThe objective is to prepare an state-of-the-art report on existing sensoring techniques (including probability of detection and survival expectation), deployment methods (both in new and existing structures), data collection and post-processing algorithms applicable to existing concrete structures, for the on-line assessment of the present and future condition of their constituent materials.
First name Last name Country Affiliation Joan Casas Rius Spain Tech. Univ. of Catalunya, UPC-BarcelonaTech David Fernández-Ordóñez Switzerland fib
First name Last name Country Affiliation Anders Ole Stubbe Solgaard Denmark Cowi A/S David Fernández-Ordóñez Switzerland fib Doug Hooton Canada University of Toronto Ueli Angst Switzerland ETH Zurich Hans-Dieter Beushausen South Africa University of Cape Town Agnieszka Bigaj-van Vliet Netherlands TNO - Buildings, Infrastructures and Maritime Joan Casas Rius Spain Tech. Univ. of Catalunya, UPC-BarcelonaTech Eleni Chatzi Switzerland ETH Zurich Frank Dehn Germany KIT Karlsruher Institut für Technologie Frédéric Duprat France INSA Toulouse Stefanie Von Greve-Dierfeld Switzerland TFB Technology and Research for Concrete Structures Sylvia Kessler Germany Helmut-Schmidt-University/ University of the Federal Armed Forces Hamburg Ahmad Khartabil United Arab Emirates Transgulf Readymix Concrete Co. Lionel Linger France Vinci Construction Grand Projets Federica Lollini Italy Politecnico di Milano Fabrizio Moro Switzerland - Muhammad Imran Rafiq United Kingdom University of Brighton Amir Rahimi Germany Bundesanstalt für Wasserbau Javier Sanchez Spain Spanish National Research Council Frank Spörel Germany BAW Alfred Strauss Austria BOKU University Roberto Torrent Switzerland Quali- Ti-Mat Sagl Michael Vogel Germany Karlsruher Institut für Technologie (KIT) - Universität (Campus Süd) Johannes Wimmer Germany Uni Munschen Franziska Schmidt France Université Gustave Eiffel, MAST/EMGCU Yuguang Yang Netherlands Technische Universiteit Delft Carmen Andrade Spain Centre Internacional de Mètodes Numèrics en l’Ènginyeria (CIMNE) -
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TG8.12 - Deterioration mechanisms related to other phenomena
Task Group 8.12 has a focus of addressing all durability phenomena other than corrosion due to chlorides and carbonation. The phenomena include Freeze Thaw, Chemical Attack, Abrasion/Erosion/Cavitation, and Internal Attacks (ASR / DEF).
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WP8.12.1 - Freeze-ThawFreezing and thawing in concrete is a widespread durability problem. The lack of universally accepted guidelines for modelling concrete damage due to freeze-thaw indicates the need for a more comprehensive assessment of the topic.ScopeThe main objective of the WP is the revision of the state-of-the-art and identification of research needs in the fields of freeze-thaw and low-temperature deicing salt damage. A critical analysis of the state-of-the-art to identify major research needs will be performed. Salt damage, especially at high concentrations has been somewhat ignored, including understanding from a fundamental perspective; therefore, significant effort will be spent on this topic. A potential deliverable is the generation of a special fib bulletin, that contains the state-of- the-art on the aforementioned topics. Apart from a special fib bulletin, conference sessions and workshops will also be proposed, where the results obtained will be disseminated.
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WP8.12.2 - Abrasion/erosion and cavitationThe aspect of physical damage to concrete by abrasion/erosion and cavitation is tricky to model. This makes new design of concrete to resist such damage quite difficult.ScopeThe main objective of the WP is the revision of the state of the art in the field of "abrasion, erosion and cavitation" as well as the realization of a special fib bulletin, which will contain additional information on the above-mentioned topics.
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WP8.12.3 - Chemical and biogenic attack, and leachingChemical attack and leaching can occur in numerous ways, which makes their modelling very difficult. It is important to clearly distinguish the transport mechanisms that lead to these issues, in order to understand the methodology for design of concrete structures.ScopeThe main objective of the WP is to put together the latest developments in the area of chemical attack and leaching of concrete.
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WP8.12.4 - Internal Attacks (ASR / DEF)While Alkali Silica Reaction and Delayed Ettringite Formation are extensively studies, there are no clear models available to predict the damage in any given situation. It is therefore essential to compile the latest information and synthesize it to obtain a good control of concrete structures in these situations.ScopeThe objective of the WP is to support and expand the information in fib Model Code 2020 regarding alkali-silica reaction (ASR) and delayed ettringite formation (DEF) in concrete. Our efforts will be aimed at presenting a way forward for modeling ASR/DEF to be adopted in future versions of the Model Code and for use by structural engineers to allow design of concrete structures to be durable against ASR and DEF.
First name Last name Country Affiliation Manu Santhanam India Department of Civil Engineering David Fernández-Ordóñez Switzerland fib Leandro Moretti Sanchez Canada University of Ottawa -
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