Project

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Concrete Solutions

English title Concrete Solutions
Applicant Habert Guillaume
Number 154064
Funding scheme NRP 70 Energy Turnaround
Research institution Institut für Bau- und Infrastrukturmanagement ETHZ
Institution of higher education ETH Zurich - ETHZ
Main discipline Civil Engineering
Start/End 01.03.2015 - 31.12.2018
Approved amount 287'362.00
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All Disciplines (6)

Discipline
Civil Engineering
Mechanical Engineering
Economics
Material Sciences
Architecture and Social urban science
Other disciplines of Engineering Sciences

Keywords (6)

CO2 mitigation; New and existing structures; Steel; Grey energy; Cement; Building systems

Lay Summary (French)

Lead
Les progrès réalisés dans l’isolation et les techniques de chauffage permettent désormais d’avoir des bâtiments consommant peu d’énergie fossile pendant leur durée de vie. En contrepartie, cette diminution de la consommation d’énergie pendant l’utilisation des bâtiments met en lumière l’énergie nécessaire lors de leur construction. En particulier, la production des matériaux structurels représente dans ce nouveau contexte, une part prédominante de l’énergie fossile consommée. L’objectif de ce projet est donc d’identifier des solutions techniques pouvant être implémentées d’ici 2050 permettant de réduire drastiquement la quantité d’énergie grise dans notre environnement construit. L’industrie cimentière a déjà fait d’importants progrès, mais une intensification de la substitution du ciment est actuellement limitée par le rôle de protection des armatures joué par le ciment. Nous cherchons donc à développer des solutions structurelles où le béton armé serait renforcé sans acier.
Lay summary

Contenu et objectifs du travail de recherche

Au sein de ce projet, plusieurs groupes de recherche collaborent afin de repousser les limites actuelles de substitution cimentaire. Le premier groupe se focalisera sur une meilleure compréhension de la corrosion des aciers, ainsi que sur le développement de nouveaux plastifiants adaptés aux ciments à fort taux de substitution. Ceci permettra de sécuriser et de favoriser l’utilisation de ces nouveaux ciments qui commencent déjà à pénétrer le marché. Les résultats pourront donc avoir un effet immédiat. D’autres groupes utiliseront ces résultats pour développer des solutions structurelles où ce béton à très faible CO2 sera armé avec du bois ou des fibres synthétiques. Ces nouvelles solutions constructives modifient largement le comportement des structures ce qui nécessite des mesures sur des modèles à l’échelle 1 et la modélisation des comportements enregistrés.

Contexte scientifique et social du projet de recherche

Ce projet a pour ambition d’assurer une diminution immédiate de la quantité de clinker dans le ciment et de développer en parallèle des solutions constructives qui pourront être implémentées massivement à moyen terme. L’énergie grise du bâtiment, c’est-à-dire l’énergie consommée pour produire et assembler les matériaux de construction, représente un enjeu majeur pour notre stratégie à 2050 puisqu’il n’existe pas actuellement de solutions technologiques à implémenter. Ceci est l'objectif de notre projet.
Direct link to Lay Summary Last update: 27.10.2014

Responsible applicant and co-applicants

Employees

Publications

Publication
Life cycle assessment of Self-Healing Engineered Cementitious Composite (SH-ECC) used for the rehabilitation of bridges
Van den HeedePhilip, NeleDe Belie, PittauFrancesco, HabertGuillaume, MignonArn (2018), Life cycle assessment of Self-Healing Engineered Cementitious Composite (SH-ECC) used for the rehabilitation of bridges, in Life-Cycle Analysis and Assessment in Civil Engineering: Towards an Integrated Vision, Ghent, BelgiumCaspeele, Taerwe & Frangopol - Taylor & Francis Group, London, UK.
Environmental assessment of radical innovation in concrete structures
Zingg Sharon, PittauFrancesco, LammleinTobias, HajiesmaeiliAmir, LuraPietro, DenarieEmmanuel, HabertGuillaume (2017), Environmental assessment of radical innovation in concrete structures, in XIV DBMC – 14th International Conference on Durability of Building Materials and Components, Ghent, BelgiumRILEM Publication S.A.R.L., Paris, France.
Environmental design guidelines for digital fabrication
Agustí-Juan Isolda, Habert Guillaume (2017), Environmental design guidelines for digital fabrication, in Journal of Cleaner Production, 142, 2780-2791.

Collaboration

Group / person Country
Types of collaboration
DISEG/Politecnico di Torino Italy (Europe)
- Publication
- Exchange of personnel
Dr. Marta Palacios Arevelo / Dept. Civil engineering / IfB / ETH Zurich Switzerland (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
- Research Infrastructure
- Exchange of personnel
Dr. Emmanuel Denarié / School of Architecture, Civil & Environmental Engineering / MCS / EPFL Switzerland (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
- Research Infrastructure
- Exchange of personnel
Prof. Dr. Karen Scrivener / Dept. Material Science / Construction Material Lab / EPFL Switzerland (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
- Research Infrastructure
- Exchange of personnel
Prof. Dr. Andrea Frangi / Dept. Civil engineering / IbK / ETH Zurich Switzerland (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
- Research Infrastructure
- Exchange of personnel
Prof. Dr. Pietro Lura / Concrete & Construction Chemistry Lab / EMPA Switzerland (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
- Research Infrastructure
- Exchange of personnel
Prof. Dr. Guillaume Habert / Dept. Civil engineering / IBI / ETH Zurich Switzerland (Europe)
- in-depth/constructive exchanges on approaches, methods or results
Prof. Dr. Eugen Brühwiler / School of Architecture, Civil & Environmental Engineering / MCS / EPFL Switzerland (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
- Research Infrastructure
- Exchange of personnel
COPPE-NUMATS/Federal University of Rio de Janeiro Brazil (South America)
- in-depth/constructive exchanges on approaches, methods or results
- Exchange of personnel
Prof. Dr. Robert Flatt / Dept. Civil engineering / IfB / ETH Zurich Switzerland (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
- Research Infrastructure
- Exchange of personnel
Prof. Dr. Bernhard Elsener / Dept. Civil engineering / IfB / ETH Zurich Switzerland (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
- Research Infrastructure
- Exchange of personnel
Concrete and environment group/Ghent University Belgium (Europe)
- Publication
- Exchange of personnel
Prof. Dr. Ingo Burgert / Dept. Civil engineering / IfB / ETH Zurich Switzerland (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
- Research Infrastructure
- Exchange of personnel
Dr. Giovanni Terrasi / Mechanical Systems Engineering Lab / EMPA Switzerland (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
- Research Infrastructure
- Exchange of personnel
Prof. Dr. Eleni Chatzi / Dept. Civil Engineering / IbK / ETH Zurich Switzerland (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
- Research Infrastructure
- Exchange of personnel

Scientific events

Active participation

Title Type of contribution Title of article or contribution Date Place Persons involved
IALCCE 2018 - Life-Cycle Analysis and Assessment in Civil Engineering: Towards an Integrated Vision Talk given at a conference Life cycle assessment of Self-Healing Engineered Cementitious Composite (SH-ECC) used for the rehabilitation of bridges 28.10.2018 Ghent, Belgium Pittau Francesco; Habert Guillaume;
Cemnet Meeting Individual talk Radical innovation in concrete structures 18.09.2017 Bern, Switzerland Pittau Francesco; Habert Guillaume;
XIV DBMC – 14th International Conference on Durability of Building Materials and Components Talk given at a conference Environmental assessment of radical innovation in concrete structures 29.05.2017 Ghent, Belgium Pittau Francesco; Habert Guillaume;


Self-organised

Title Date Place
Regenerative technologies towards Sustainable Development Goals - Seminar 24.01.2019 Zurich, Switzerland
THINK Earth! 01.11.2017 Zurich, Switzerland

Knowledge transfer events

Active participation

Title Type of contribution Title of article or contribution Date Place Persons involved
NRP 70 Low energy concrete - 4th Stakeholders Meeting Talk 28.02.2018 Dübendorf, Switzerland
NRP 70 Low energy concrete - 3rd Stakeholders Meeting Talk 11.05.2017 Bern, Switzerland
NRP 70 Low energy concrete - 2nd Stakeholders Meeting Workshop 29.09.2016 Zurich, Switzerland
NRP 70 Low energy concrete - 1st Stakeholders Meeting Talk 17.06.2015 Bern, Switzerland


Communication with the public

Communication Title Media Place Year
Print (books, brochures, leaflets) NEST, il nuovo edificio per la ricerca applicata dell’Empa - Dübendorf, Switzerland Italian-speaking Switzerland International 2018
Talks/events/exhibitions Dialogue «chercheurs ↔ acteurs de l’économie et l’innovation» Western Switzerland 2017
Media relations: print media, online media Weekly Spotlight on Energy Research ETHZ News International German-speaking Switzerland 2017
Media relations: print media, online media Radical innovation in concrete structures TEC21 German-speaking Switzerland 2016
Talks/events/exhibitions Technology & Innovation Workshop Western Switzerland 2016

Associated projects

Number Title Start Funding scheme
172481 Molecular control of cement hydration through tailored chemical admixtures 01.09.2017 Project funding (Div. I-III)
170721 Enabling infrastructure for digital fabrication in concrete 01.01.2017 R'EQUIP

Abstract

The objective of this joint project is to identify technical solutions that could be implemented in a medium term perspective on a mass scale in the construction sector in order to reduce the energy required to build and maintain our built environment.Very large efforts have already been made by the cement industry to reduce fossil energy consumption and its associated CO2 emissions, however, further cement reductions are now limited by the fact that cement in concrete act as the binder to provide mechanical strength as well as a protection against steel corrosion. A further reduction of clinker reduction is possible at the concrete level, but steel protection by the high pH imposed by cement will not be secured anymore.In the joint project, one research group (WP1) is working to better understand steel corrosion and secure the cement substitution up to 40% substitution which is a great interest for short term and immediate improvement. Other groups propose to tackle this problem by exploring what could be a reinforced concrete construction without steel reinforcement bars. They replace steel by other tensile resistant materials such as wood (WP2), pre-stressed carbon-fibre polymer (WP3) or synthetic fibres (WP4). Replacing steel suddenly opens new innovation at the cement and concrete level but more generally for the entire construction sector. Firstly, it allows, pushing cement substitution much higher than in current practice leading to substantial CO2 and energy reductions. In addition the steel consumption would be reduced which will provide very large saving in electricity consumption in addition to further CO2 savings. In Switzerland, steel is largely an imported product and therefore the energy used to produce the steel is not produced in Switzerland but still contributes to the overall energy needs from the country.As a consequence, the objective of the joint project is to tackle simultaneously the embodied energy coming from national sources such as the cement as well as the grey energy coming from abroad and embedded in the steel products. This latter grey energy represents a dependency towards external energy prices fluctuations and is therefore a crucial issue to tackle in a federal energy strategy for 2050.
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