• COM8: Durability

    COM8: Durability

  • COM8: Durability

    COM8: Durability

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.

 

0a942bb682c4113b8670e08f stream Commission Chair
José Campos e Matos
Manu SanthanamDeputy Chair
Manu Santhanam
Carmen AndradeCo Deputy Chair
Carmen Andrade

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
David Gardiner Australia SMEC Australia Pty Ltd
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

    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.


    Eduardo JúlioConvener
    Eduardo Júlio

    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.


    José A. Campos e MatosConvener
    José A. Campos e Matos

    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.


    Steinar HellandConvener
    Steinar Helland
    Joanitta NdawulaCo-Convener
    Joanitta Ndawula

    • WP8.8.1 - Durability planning
       
      During 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.

      Rodney PaullConvener
      Rodney Paull

      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 deterioration
       
      The 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).

      Beatrice BellettiConvener
      Beatrice Belletti

      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 Zones
       
      The 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.

      Joanitta NdawulaConvener
      Joanitta Ndawula

      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 concretes
       
      Durability 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
       

      Stefanie Von Greve-DierfeldConvener
      Stefanie Von Greve-Dierfeld
      Frank DehnCo-Convener
      Frank Dehn
      Bruno HuetCo-Convener
      Bruno Huet

      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.

    Carmen AndradeConvener
    Carmen Andrade

    • WP8.9.1 - Corrosion initiation
       
      WP 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.

      Amir RahimiConvener
      Amir Rahimi
      Juan Lozano VarcarcelCo-convener
      Juan Lozano Varcarcel

      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 Propagation
       
      WP 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.

      Carmen AndradeConvener
      Carmen Andrade

      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 Threshold
       
      TG 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 bars
       
      Scope
      • 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

      Frank PapworthConvener
      Frank Papworth
      Federica LolliniCo-convener
      Federica Lollini

      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.

      David GardinerConvener
      David Gardiner

      First name Last name Country Affiliation
      David Gardiner Australia SMEC Australia Pty Ltd
      David Fernández-Ordóñez Switzerland fib

    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.


    Franziska SchmidtConvener
    Franziska Schmidt

    • WP8.11.1 - Testing of New Concrete
       
      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 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.

      Franziska SchmidtConvener
      Franziska Schmidt

      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 Concrete
       
      As 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.
       
      Scope
      The 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.

      Joan Casas RiusConvener
      Joan Casas Rius

      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)

  • 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).


    Leandro SánchezConvener
    Leandro Sánchez

    • WP8.12.1 - Freeze-Thaw
       
      Freezing 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.
       
      Scope
      The 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.

      TBDConvener
      TBD

    • WP8.12.2 - Abrasion/erosion and cavitation
       
      The 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.
       
      Scope
      The 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.

      Michael VogelConvener
      Michael Vogel

    • WP8.12.3 - Chemical and biogenic attack, and leaching
       
      Chemical 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.
       
      Scope
      The main objective of the WP is to put together the latest developments in the area of chemical attack and leaching of concrete.

      TBDConvener
      TBD

    • 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.
       
      Scope
      The 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.

      Leandro SánchezConvener
      Leandro Sánchez

    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

 

fib postal address

Ch. du Barrage, Station 18
CH-1015 Lausanne
Switzerland

Contact

p : +41 21 693 27 47
f : +41 21 693 62 45
e : info@fib-international.org
w : www.fib-international.org

Follow fib

Subscribe our newsletter

News

Follow us on
           

Join the fib

Join the fib