Université Paris-Est
Ecole des Ponts ParisTech


Accueil du site > Equipes de recherche > Matériaux et Structures Architecturés (MSA) > Eco conception > Eco-design


Eco-design requires the integration of materials and processes with low impact but also to be able to quantify these impacts. In this context, MSA has developed several projects based on use of wood or other natural or bio-based materials in combination with other more conventional materials in the field of civil engineering and buildings. The objectives of these researchs are to take into account the best complementarities from the mechanical and environmental point of view. In parallel, the team is working on the development of databases and LCA methodologies in line with national construction methods.

Wood-based materials or structures :

The main activities are : analysis of the hygromechanical behavior of wood-aggregate concrete or wood material, study of the mechanical behavior of bonded joint between Glued Laminated Timber and ultra-high performance fiber reinforced concrete (UHPFRC) or Cross Laminated timber structures. Hygro-mechanical and durability properties are analysed taking into account the behavior of the interfaces or the microstructure characteristics. Multiscale experimental tests, modelling of the interface behaviour (see modelling section) and technical proposals (for instance bonding of fresh concrete on timber) allowed developing for instance these projects :

  • Bonded composite constructions using timber and UHPFRC concrete for innovative bridge structure,
  • Composite concrete-timber floor for commercial building constructions

Green concrete

Exploration and development of cementitious matrix materials with low environmental impact, from the point of view of CO2 emissions and energy consumption, is also an activity of MSA. The team contributes to establishing design principles for structures that minimize these impact indicators. Examples include :

  • New blast furnace slag cements,
  • Sulfoaluminate clinker
  • Valorisation of phosphogypsum

Tools to measure environmental impacts

To be able to qualify the proposed innovations, MSA also participates in the development of reliable Life Cycle Analysis (LCA) methodologies and enrichment of databases, both through research and data integration of unconventional materials (composites, adhesive), but also by taking into account national specificities, both on the materials used and on the construction methods. Many collaborative projects are underway on this theme :

  • Development of a database of environmental impacts of materials for civil engineering works (diogen)
  • Evaluation of impacts related to the deconstruction of buildings
  • LCA of complex and assembled materials

Some pictures and illustrations

- Wood behavior

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Hygro-mechanical behavior of wood and wood-agregate concrete.

- mixed beams, slabs and decks for floor and bridges

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Bonded composite constructions using timber and ultra-high performance fiber concrete (UHPFRC)

- Green concrete

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Concretes made with sulfoaluminate clinker. Presence of ettringite at the paste-aggregate interface.
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H S Pham, R Le Roy, JF Caron, G Foret, New hybrid bridge decks using carbon fibres, very high performance concrete and wood, NR2C.
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A Alaoui, A Feraille, A. Dimassi, VH Nguyen, R Le Roy, L Divet, Experimental Study of Sulfoaluminate Concrete Based Materials, CONSEC’07 Tours, France, Concrete under Severe Conditions : Environment & Loading, F. Toutlemonde et al. (eds).

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