• 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.

 

Lionel LingerCommission Chair
Lionel Linger
Carola EdvuardsenDeputy Chair
Carola Edvardsen

First name Last name Country Affiliation
León F. Javier Spain FHECOR - Ingenieros Consultores
Frangopol Dan United States Lehigh University
Alexander Mark South Africa University of Cape Town
Hooton Doug Canada University of Toronto
Gulikers Joost Netherlands Rijkswaterstaat Centre for Infrastructure
Solgaard Anders Ole Stubbe Denmark Cowi A/S
Sandeford Paul Australia GHD Pty. Ltd
Anstice Daniel Australia GHD
Moriwake Atsuro Japan TOA Corporation
Marano Giuseppe Carlo Italy Politecnico di Bari
Vimmr Václav Czech Republic STú - K, a.s.
Markeset Gro Norway TDK, Institutt for bygg- og energiteknikk
Sgobba Sara Italy Private
Safi Mohammed Sweden Royal Institute of Technology (KTH)
Osterminski Kai Germany TU München
Wigum B. J. Iceland Mannvit Reykjavik
Sirivivatnanon Vute Australia Cement Concrete & Aggregate Australia
Jacobs Josse Belgium CSTC-WTCB-BBRI
Vennesland Øystein Norway NTNU
Tikalsky Paul United States The University of Utah
El-Safty Adel United States University of North Florida
Hosoda Akira Japan Yokohama National University
Straub Daniel Germany TU München
François Raoul France INSA
Vogel Thomas Switzerland ETH Zürich
Alipour Alice United States Iowa State University
Helland Steinar Norway S Helland Konsult
Van Der Horst Aad Netherlands BAM Infraconsult bv.
Ramezanianpour Ali Akbar Iran, Islamic Republic of Amirkabir Univ. of Technology
Andrade Carmen Spain Instituto Eduardo Torroja
Edvardsen Carola K. Denmark Cowi AS
Meda Alberto Italy University of Rome “Tor Vergata”
Randl Norbert Austria Carinthia Univ. of Applied Sciences
Rinaldi Zila Italy University of Rome “Tor Vergata”
Strauss Alfred Austria Univ. Bodenkultur Vienna
Rahimi Amir Germany Bundesanstalt für Wasserbau
Torrent Roberto Switzerland Quali- Ti-Mat Sagl
Bevc Lojze Slovenia ZAG Slovenije
Kobayashi Koichi Japan Gifu University
Paeglitis Ainars Latvia Riga Technical University
Ferreira Nuno United Kingdom Arup
Appleton Júlio Portugal A2P Consult
Gehlen Christoph Germany CBM
Miyagawa Toyoaki Japan Kyoto University
Papworth Frank Australia BCRC
Cairns John United Kingdom Heriot-Watt University
Matthews Stuart United Kingdom Consulting
Fernández-Ordóñez David Switzerland fib
Ikeda Shoji Japan Hybrid Research Inst. Inc.
Linger Lionel France Vinci Construction
Ferreira Rui Miguel Finland VTT Techn. Research Centre of Finland
Bartholomew Michael United States CH2M HILL
Ueda Tamon Japan Hokkaido University
Campos e Matos José Portugal University of Minho
Subbarao Harshavardhan India Construma Consultancy Pvt. Ltd.
Neves Luis United Kingdom Nottingham University
Casas Rius Joan Spain Tech. Univ. of Catalunya, UPC-BarcelonaTech
Matthys Stijn Belgium Ghent University
Dehn Frank Germany KIT Karlsruher Institut für Technologie
Larsen Claus Norway Norwegian Public Roads Administration
Smith David United Kingdom Atkins
Thomas Michael Canada University of New Brunswick
Ueda Takao Japan University of Tokushima
Julio Eduardo Portugal Instituto Superior Tecnico, Universidade de Lisboa
Pacheco Jose United States CTLGroup
Gong Fuyuan China Zhejiang University
Bigaj-van Vliet Agnieszka Netherlands TNO-Built Environment + Geosciences

  • TG8.1 - Model technical specification for repairs and interventions

    Task Group 8.1 is preparing a technical report on the subject of the requirements for a model specification for repairs and interventions with the goal of achieving publication as an fib bulletin. Consideration will be given as to whether this work should later be taken forward as a future Guide to Good Practice.

    A first draft report is under development. It has been decided to further develop the approach employed in a Norwegian document containing model technical specifications for a number of rehabilitation methods and align them to the Eurocode convention. In so doing it is envisaged that this report will deliver a model technical specification for a range of rehabilitation methods, each underpinned by their principles. Topics and techniques being considered for inclusion include: Concrete removal, concrete reinstatement, patch repair; surface treatments and coating; cathodic protection; chloride extraction; realkalisation; crack sealing; physical protection / barriers; cladding; inhibitors; electro–osmosis; sacrificial anode (in patch repair); strength; external reinforcement; jacketing; external pre-stressing and replacement and reconstruction of elements. These topics will be preceded by chapters covering the investigation of defective concrete from inspection and testing to monitoring.


    Eduardo JulioConvener
    Eduardo Julio

    First name Last name Country Affiliation
    Stipanovic Oslakovic Irina Netherlands University of Twente
    Solgaard Anders Ole Stubbe Denmark Cowi A/S
    Edvardsen Carola K. Denmark Cowi AS
    Appleton Júlio Portugal A2P Consult
    Miyagawa Toyoaki Japan Kyoto University
    Papworth Frank Australia BCRC
    Cairns John United Kingdom Heriot-Watt University
    Fernández-Ordóñez David Switzerland fib
    Ikeda Shoji Japan Hybrid Research Inst. Inc.
    Bartholomew Michael United States CH2M HILL
    Cavaco Eduardo Portugal Faculdade de Ciências e Tecnologia, Universidade NOVA de Lisboa
    de Sena Cruz José Manuel Portugal University of Minho
    Kobayashi Koichi Japan Gifu University
    jramoacorreia João Portugal Instituto Superior Técnico, University of Lisbon
    Constantinos Repapis Greece University of West Attica
    Su Meini United Kingdom University of Manchester
    Habuchi Takashi Japan Toa Corporation
    Sánchez Moreno Mercedes Spain Universidad de Córdoba
    Monteiro André Portugal National Laboratory for Civil Engineering
    Subbarao Harshavardhan India Construma Consultancy Pvt. Ltd.
    Bevc Lojze Slovenia ZAG Slovenije
    Christodoulou Christian United Kingdom AECOM Ltd
    Pielstick Brett United States -
    Dritsos Stephanos Greece University of Patras
    Lampropoulos Andreas United Kingdom University of Brighton
    Paeglitis Ainars Latvia Riga Technical University
    Kikuta Etsuji Japan Civil Engineering Research Institute for Cold Region
    Lima Luis Argentina UNNOBA
    Moseley On Greece -
    Smith David United Kingdom Atkins
    Ueda Takao Japan University of Tokushima
    Giarlelis Christos Greece Equidas Consulting Engineers
    Kyriakides Nicholas Cyprus Cyprus University of Technology
    Correia Luís Portugal University of Minho
    Pantazopoulou Voula (S.J.) Canada The Lassonde Faculty of Engineering, York University
    Ribeiro Sofia Portugal Laboratório Nacional de Engenharia Civil, LNEC
    Rousakis Theodoros Greece Democritus University of Thrace
    Randl Norbert Austria Carinthia Univ. of Applied Sciences
    Julio Eduardo Portugal Instituto Superior Tecnico, Universidade de Lisboa
    Czaderski-Forchmann Christoph Switzerland EMPA, Structural Engineering
    Verbaten Mark Netherlands ABT bv
    Laco Jan United Kingdom Atkins

  • TG8.2 - Birth and re-birth certificates & through-life management aspects

    Task Group 8.2 (TG8.2) is preparing a technical report on the subject of birth and re-birth certificates & related through-life management aspects.

    The goal of the technical report is to develop a template for the rational approach to the assessment of a “Life Rating” for individual structures. The template will organise and analyse design parameters and as-built data in an effort to predict the type and frequency for in-service inspections. This information will then provide a mechanism for owners and engineers to optimise the inspection frequency providing a cost saving over time.


    Michael BartholomewConvener
    Michael Bartholomew

    First name Last name Country Affiliation
    McKenna Philip Ireland Halcrow Group Ltd., a CH2M HILL Company
    Marano Giuseppe Carlo Italy Politecnico di Bari
    Edvardsen Carola K. Denmark Cowi AS
    Bevc Lojze Slovenia ZAG Slovenije
    Paeglitis Ainars Latvia Riga Technical University
    Papworth Frank Australia BCRC
    Cairns John United Kingdom Heriot-Watt University
    Pielstick Brett United States -
    Fernández-Ordóñez David Switzerland fib
    Bartholomew Michael United States CH2M HILL
    Campos e Matos José Portugal University of Minho
    Subbarao Harshavardhan India Construma Consultancy Pvt. Ltd.
    Ramezanianpour Ali Akbar Iran, Islamic Republic of Amirkabir Univ. of Technology

  • TG8.3 - Operational document to support Service Life Design

    The motivation of fib Task Group 8.3 (TG8.3) is the need to introduce the advanced probabilistic approach in the design of service life and durability. The fib MC2010 has incorporated a performance approach for the durability design that is not known and experienced by current engineers. A document is needed to explain in detail and with examples the procedure and the meaning of designing by performance.

    The objective of TG8.3 is to develop a technical report that will provide operational guidance to support the practical implementation of fib/ISO Service Life Design codes and standards with the goal of achieving publication as a bulletin (following the publication of relevant service life design codes and standards).


    Carmen AndradeConvener
    Carmen Andrade

    First name Last name Country Affiliation
    Gulikers Joost Netherlands Rijkswaterstaat Centre for Infrastructure
    Stipanovic Oslakovic Irina Netherlands University of Twente
    Vimmr Václav Czech Republic STú - K, a.s.
    Cleland David United Kingdom Queen’s University Belfast
    Markeset Gro Norway TDK, Institutt for bygg- og energiteknikk
    Sgobba Sara Italy Private
    Andrade Carmen Spain Instituto Eduardo Torroja
    Edvardsen Carola K. Denmark Cowi AS
    Meda Alberto Italy University of Rome “Tor Vergata”
    Kobayashi Koichi Japan Gifu University
    Ferreira Nuno United Kingdom Arup
    Miyagawa Toyoaki Japan Kyoto University
    Papworth Frank Australia BCRC
    Cairns John United Kingdom Heriot-Watt University
    Matthews Stuart United Kingdom Consulting
    Fernández-Ordóñez David Switzerland fib
    Linger Lionel France Vinci Construction
    Bartholomew Michael United States CH2M HILL
    Subbarao Harshavardhan India Construma Consultancy Pvt. Ltd.

  • 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
    Stipanovic Oslakovic Irina Netherlands University of Twente
    Solgaard Anders Ole Stubbe Denmark Cowi A/S
    Rinaldi Zila Italy University of Rome “Tor Vergata”
    Strauss Alfred Austria Univ. Bodenkultur Vienna
    Fernández-Ordóñez David Switzerland fib
    Papworth Frank Australia BCRC
    Campos e Matos José Portugal University of Minho
    Casas Rius Joan Spain Tech. Univ. of Catalunya, UPC-BarcelonaTech
    Smith David United Kingdom Atkins
    Akiyama Hiroshi Japan Tokyo Soil Research CO., LTD
    Arangio Stefania Italy Sapienza University of Rome
    Caprani Colin Australia Monash University
    El-Dieb Amr United Arab Emirates United Arab Emirates University
    Ferreira Rui Miguel Finland VTT Techn. Research Centre of Finland
    Frangopol Dan United States Lehigh University
    Gulikers Joost Netherlands Rijkswaterstaat Centre for Infrastructure
    Linneberg Poul Denmark COWI A/S
    Masovic Snezana Serbia University of Belgrade
    Akbar Nezhad Ali Australia UNSW Australia
    Novak Drahomir Czech Republic Technical University of Brno
    Okasha Nader M Saudi Arabia University of Hail, Hayil
    Ruan Xin China Tongji University
    Safi Mohammed Sweden Royal Institute of Technology (KTH)
    Sanchez-Silva Mauricio Colombia Universidad de Los Andes
    Yücemen M. Semih Turkey Middle East Technical University

  • TG8.5 - Durability of post-tensioning systems

    Task Group 8.5 (TG8.5) will produce an update of Bulletin 33, “Durability of post-tensioning tendons” (Recommendation published in 2005). This update will include a title change to address the ever changing post-tensioning systems and the advancement of tendon protection systems to include prepackaged grouts and wax systems.


    Brett H. PielstickConvener
    Brett H. Pielstick

    First name Last name Country Affiliation
    Safi Mohammed Sweden Royal Institute of Technology (KTH)
    Ferreira Nuno United Kingdom Arup
    Pielstick Brett United States -
    Fernández-Ordóñez David Switzerland fib
    Bartholomew Michael United States CH2M HILL
    Hunsicker Gregory United States OnPoint Engineering and Technology LLC
    Neves Luis United Kingdom Nottingham University
    Krauser Larry United States General Technologies, Inc.
    Ganz Hans Rudolf Switzerland Ganz Consulting
    Laco Jan United Kingdom Atkins
    Theryo Teddy United States Florida Department of Transportation

  • TG8.7 - Durability design of steel fibre reinforced concrete

    Steel fibres are supported in MC2010 but no limitation are placed on their use in regards durability. While it is recognised that Steel Fibre Reinforced Concrete (SFRC) may be highly durable, steel fibres do corrode in some exposures and when corrosion occurs a very small loss of fibre thickness may lead to significant loss of concrete performance. Although structural guidance codes for SFRC exist today, and provide valuable design information and procedures, durable structures may not result in exposure classes XD2, XD2, XS3 and XD3 (DafStb Guideline on Steel fibre reinforced concrete) due to the lack of any durability guidance. At best current codes suggest the need for special provisions for exposure class 3 or higher (RILEM TC 162-TDF) without providing durability design methods.

    A literature review of research and use of steel fibres in concrete in regards durability will be the main method of developing and understanding the performance of SFRC under several exposure environments. The group will consider the notion of critical chloride content distributions that support initiation of fibre corrosion, alkalinity reduction due to carbonation and the effect of cracking with regard to fibre corrosion. The aim is to define model equations that also consider reduction of mechanical capacity. This will include a review of loss of concrete performance vs corrosion of fibres considering fibre types, steel types and fibre surface effects due to the manufacturing and installation processess. Also to be reviewed is the effects of mix designs and quality control on corrosion resistance.


    Nuno FerreiraConvener
    Nuno Ferreira

    First name Last name Country Affiliation
    Fernández-Ordóñez David Switzerland fib
    Papworth Frank Australia BCRC
    Solgaard Anders Ole Stubbe Denmark Cowi A/S
    Meda Alberto Italy University of Rome “Tor Vergata”
    Vitt Gerhard Germany Bekaert GmbH
    Ferreira Nuno United Kingdom Arup
    Edvardsen Carola K. Denmark Cowi AS
    Gulikers Joost Netherlands Rijkswaterstaat Centre for Infrastructure
    Gil Berrocal Carlos Sweden Chalmers University of Technology
    Bouteiller Véronique France IFSTTAR
    Lollini Federica Italy Politecnico di Milano
    Linger Lionel France Vinci Construction
    Michel Alexander Denmark DTU
    Psomas Sotiris United Kingdom Morgan Sindall
    Vandewalle Lucie Belgium KULeuven
    di Prisco Marco Italy Politecnico di Milano

  • TG8.8 - Common 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.

    Consider “Levels of Approximation” approach in durability design and set out how it is to be incorporated in durability design using the four durability verification approaches, inspection and testing and materials evaluation.


    Steinar HellandConvener
    Steinar Helland

    First name Last name Country Affiliation
    Bamforth Philipp United Kingdom Construction Consultancy
    Mai-Nhu Jonathan France CERIB
    Gilbert Raymond Ian Australia School of Civil and Environmental Engineering
    Kovler Konstantin Israel Technion - Israel Institute of Technology
    Von Greve-Dierfeld Stefanie Switzerland TFB Technology and Research for Concrete Structures
    Helland Steinar Norway S Helland Konsult
    Toutlemonde François France IFSTTAR
    Fernández-Ordóñez David Switzerland fib
    Linger Lionel France Vinci Construction
    Papworth Frank Australia BCRC
    Bartholomew Michael United States CH2M HILL
    Beushausen Hans-Dieter South Africa University of Cape Town
    Curtis Stuart Australia RTR Bridge Construction Services
    Torrenti Jean Michel France IFSTTAR
    Cox R. William United States Am. Segmental Bridge Inst.
    Nielsen Claus Denmark DTI - Danish Technological Institute
    Bigaj-van Vliet Agnieszka Netherlands TNO-Built Environment + Geosciences

  • TG8.9 - Deterioration Mechanisms

    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.

    None of the deterioration processes have been developed in the fib documents for assessment of existing structures residual life. Design guidance for this phase is a primary objective for TG8.9.

    Model Code 2010 notes that a structures robustness (AG10) could be compromised by deterioration but it provides no details of what these failures might be or measures to be taken to avoid them.


    Carmen AndradeConvener
    Carmen Andrade
    Christophe GehlenConvener
    Christophe Gehlen

    First name Last name Country Affiliation
    Andrade Carmen Spain Instituto Eduardo Torroja
    Fernández-Ordóñez David Switzerland fib
    Edvardsen Carola K. Denmark Cowi AS
    Gehlen Christoph Germany CBM
    Helland Steinar Norway S Helland Konsult
    Von Greve-Dierfeld Stefanie Switzerland TFB Technology and Research for Concrete Structures
    Santhanam Manu India IIT Madras
    Rahimi Amir Germany Bundesanstalt für Wasserbau

  • TG8.10 - Steel reinforcement

    The key objective of this task group is to provide clear design procedures for the four durability verification methods in MC2010 for metallic reinforcements in concrete.

    Extensive as MC2010 is on durability design, it does not give any guidance on specialty reinforcement noting only, “The following special types of steel that show enhanced corrosion protection properties can be used: galvanized steels, epoxy coated steels and stainless steels”. Use of reinforcement with a high resistance to corrosion has the potential to reduce the impost of reinforcement corrosion by orders of magnitude. With appropriate design procedures, specialty steel can significantly reduce cover requirements leading to increased sustainability. Therefore, it is important to develop clear approaches to durability deign using these materials for MC2020.

    Pre-tensioned elements are typically specified to have higher covers and lower crack widths than low carbon steel. It is unclear if the higher covers fully account for the lower critical chloride level, different failure mechanisms and higher reliability requirements based on mode of failure. It is also unclear whether these higher protection requirements are universally required or if they can be relaxed based on the steel specification. This needs to be resolved for MC2020.


    Frank PapworthConvener
    Frank Papworth

    First name Last name Country Affiliation
    Zivanovic Ivica France Freyssinet
    Andrade Carmen Spain Instituto Eduardo Torroja
    Fernández-Ordóñez David Switzerland fib
    Papworth Frank Australia BCRC
    Green Warren Australia Vinsi Partners
    Golding Peter Australia Galvanizers Association of Australia
    Vítek Jan Czech Republic Metrostav a. s.

  • TG8.11 - 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, 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.


    Carola EdvardsenConvener
    Carola Edvardsen

    First name Last name Country Affiliation
    Schmiedel Sarah Germany Universität (Campus Süd) Institut für Massivbau und Baustofftechnologie
    Lollini Federica Italy Politecnico di Milano
    Vogel Michael Germany Karlsruher Institut für Technologie (KIT) - Universität (Campus Süd)
    Solgaard Anders Ole Stubbe Denmark Cowi A/S
    Zivanovic Ivica France Freyssinet
    Andrade Carmen Spain Instituto Eduardo Torroja
    Fernández-Ordóñez David Switzerland fib
    Stipanovic Oslakovic Irina Netherlands University of Twente
    Dehn Frank Germany KIT Karlsruher Institut für Technologie
    Ferreira Nuno United Kingdom Arup
    Edvardsen Carola K. Denmark Cowi AS
    Linger Lionel France Vinci Construction
    Beushausen Hans-Dieter South Africa University of Cape Town
    Gehlen Christoph Germany CBM
    Von Greve-Dierfeld Stefanie Switzerland TFB Technology and Research for Concrete Structures
    Rahimi Amir Germany Bundesanstalt für Wasserbau
    Di Pace Guillermo Argentina Di Pace - Rhor Consulting
    Hooton Doug Canada University of Toronto
    Strauss Alfred Austria Univ. Bodenkultur Vienna
    Torrent Roberto Switzerland Quali- Ti-Mat Sagl
    Bigaj-van Vliet Agnieszka Netherlands TNO-Built Environment + Geosciences

 

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