• 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.

 

Frank PapworthCommission Chair
Frank Papworth
Lionel LingerDeputy Chair
Lionel Linger

First name Last name Country Affiliation
- - - -
F. Javier León Spain FHECOR - Ingenieros Consultores
Dan Frangopol United States Lehigh University
Philip McKenna Ireland Halcrow Group Ltd., a CH2M HILL Company
Mark Alexander South Africa University of Cape Town
Doug Hooton Canada -
Joost Gulikers Netherlands Rijkswaterstaat Centre for Infrastructure
Scott Smith Australia Southern Cross University
Irina Stipanovic Oslakovic Netherlands University of Twente
Anders Ole Stubbe Solgaard Denmark -
Paul Sandeford Australia GHD Pty. Ltd
Daniel Anstice Australia -
Atsuro Moriwake Japan -
Tamon Ueda Japan Hokkaido University
Giuseppe Carlo Marano Italy Politecnico di Bari
Václav Vimmr Czech Republic STú - K, a.s.
Gro Markeset Norway TDK, Institutt for bygg- og energiteknikk
Sara Sgobba Italy -
Mohammed Safi Sweden -
Alexandra Neves Mozambique Tecnica-Engenh. Consult. Lda
Kai Osterminski Germany -
B. J. Wigum Iceland Mannvit Reykjavik
Vute Sirivivatnanon Australia Cement Concrete & Aggregate Australia
Josse Jacobs Belgium CSTC-WTCB-BBRI
Øystein Vennesland Norway NTNU
Paul Tikalsky United States -
Adel El-Safty United States University of North Florida
Akira Hosoda Japan Yokohama National University
Subbaiya Kanappan India Larsen & Toubro Ltd ECC Division
Daniel Straub Germany TU München
Raoul François France INSA
Thomas Vogel Switzerland ETH Zürich
Alice Alipour COM_COMMUNITY_LANG_NAME_ Iowa State University
Mike Otieno COM_COMMUNITY_LANG_NAME_ -
Steinar Helland Norway S Helland Konsult
Aad Van Der Horst Netherlands Delft Univ. of Technology
Agnieszka Bigaj-van Vliet Netherlands TNO-Built Environment + Geosciences
Ali Akbar Ramezanianpour Iran, Islamic Republic Of Amirkabir Univ. of Technology
Carmen Andrade Spain Instituto Eduardo Torroja
Carola 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 Univ. Bodenkultur Vienna
Harshavardhan Subbarao India Construma Consultancy Pvt. Ltd.
Amir Rahimi Germany Bundesanstalt für Wasserbau
Lionel Linger France Vinci Construction
Roberto Torrent Switzerland Quali- Ti-Mat Sagl
Michael Bartholomew United States CH2M HILL
Lojze Bevc Slovenia ZAG Slovenije
Joan Ramon Casas Rius Spain Univ. of Catalunya
Koichi Kobayashi Japan Gifu University
Stijn Matthys Belgium Magnel Lab. for Concrete Research
Ainars Paeglitis Latvia Techn. University Riga
Nuno Ferreira United Kingdom Arup
Júlio Appleton Portugal A2P Consult
Christoph Gehlen Germany CBM
Toyoaki Miyagawa Japan Kyoto University
Brett Pielstick United States Private
Eduardo Julio Portugal University of Lisboa
Frank Papworth Australia BCRC
John Cairns United Kingdom Heriot-Watt University
Stuart Matthews United Kingdom Building Research Establishment Ltd
David Fernández-Ordóñez Switzerland fib
Shoji Ikeda Japan Hybrid Research Inst. Inc.

  • 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.


    f26a5b1890dc0eaf1ac664c5Convener
    TDB

    First name Last name Country Affiliation
    - - - -
    F. Javier León Spain FHECOR - Ingenieros Consultores
    Philip McKenna Ireland Halcrow Group Ltd., a CH2M HILL Company
    Scott Smith Australia Southern Cross University
    Irina Stipanovic Oslakovic Netherlands University of Twente
    Anders Ole Stubbe Solgaard Denmark -
    Paul Sandeford Australia GHD Pty. Ltd
    Daniel Anstice Australia -
    Atsuro Moriwake Japan -
    Tamon Ueda Japan Hokkaido University
    Carola Edvardsen Denmark Cowi AS
    Harshavardhan Subbarao India Construma Consultancy Pvt. Ltd.
    Michael Bartholomew United States CH2M HILL
    Júlio Appleton Portugal A2P Consult
    Toyoaki Miyagawa Japan Kyoto University
    Ali Akbar Ramezanianpour Iran, Islamic Republic Of Amirkabir Univ. of Technology
    Eduardo Julio Portugal University of Lisboa
    Frank Papworth Australia BCRC
    John Cairns United Kingdom Heriot-Watt University
    David Fernández-Ordóñez Switzerland fib
    Shoji Ikeda Japan Hybrid Research Inst. Inc.

  • 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.


    f26a5b1890dc0eaf1ac664c5Convener
    Michael Bartholomew

    First name Last name Country Affiliation
    - - - -
    Philip McKenna Ireland Halcrow Group Ltd., a CH2M HILL Company
    Giuseppe Carlo Marano Italy Politecnico di Bari
    Carola Edvardsen Denmark Cowi AS
    Harshavardhan Subbarao India Construma Consultancy Pvt. Ltd.
    Michael Bartholomew United States CH2M HILL
    Lojze Bevc Slovenia ZAG Slovenije
    Ainars Paeglitis Latvia Techn. University Riga
    Frank Papworth Australia BCRC
    John Cairns United Kingdom Heriot-Watt University
    Brett Pielstick United States Private
    David Fernández-Ordóñez Switzerland fib

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

  • 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.


    f26a5b1890dc0eaf1ac664c5Convener
    José A. Campos e Matos

    First name Last name Country Affiliation
    - - - -
    Philip McKenna Ireland Halcrow Group Ltd., a CH2M HILL Company
    Irina Stipanovic Oslakovic Netherlands University of Twente
    Anders Ole Stubbe Solgaard Denmark -
    Carola Edvardsen Denmark Cowi AS
    Zila Rinaldi Italy University of Rome “Tor Vergata”
    Alfred Strauss Austria Univ. Bodenkultur Vienna
    Lionel Linger France Vinci Construction
    Joan Ramon Casas Rius Spain Univ. of Catalunya
    David Fernández-Ordóñez Switzerland fib

  • 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
    - - - -
    Mohammed Safi Sweden -
    Alexandra Neves Mozambique Tecnica-Engenh. Consult. Lda
    Michael Bartholomew United States CH2M HILL
    Nuno Ferreira United Kingdom Arup
    Brett Pielstick United States Private
    David Fernández-Ordóñez Switzerland fib

  • TG8.6 - Calibration of code deemed-to-satisfy provisions for durability

    The objective of Task Group 8.6 is to give an overview of the current deemed-to-satisfy rules and of the corresponding levels of reliability regarding durability in order to give suggestions on how current deemed-to-satisfy rules can be improved.

    The group should undertake a review of the background of deemed-to-satisfy options for concrete mixes for specified service life situations. The work involves a calibration of the reliability levels provided by current deemed-to-satisfy options.


    f26a5b1890dc0eaf1ac664c5Convener
    Christoph Gehlen

    First name Last name Country Affiliation
    - - - -
    Philip McKenna Ireland Halcrow Group Ltd., a CH2M HILL Company
    Joost Gulikers Netherlands Rijkswaterstaat Centre for Infrastructure
    Gro Markeset Norway TDK, Institutt for bygg- og energiteknikk
    Sara Sgobba Italy -
    Kai Osterminski Germany -
    Steinar Helland Norway S Helland Konsult
    Carmen Andrade Spain Instituto Eduardo Torroja
    Carola Edvardsen Denmark Cowi AS
    Amir Rahimi Germany Bundesanstalt für Wasserbau
    Michael Bartholomew United States CH2M HILL
    Christoph Gehlen Germany CBM
    Frank Papworth Australia BCRC
    David Fernández-Ordóñez Switzerland fib

  • 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.


    f26a5b1890dc0eaf1ac664c5Convener
    Nuno Ferreira

    First name Last name Country Affiliation
    - - - -
    David Fernández-Ordóñez Switzerland fib

 

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