Laboratory of Materials and structures of Civil Engineering.doc

Laboratory of Materials and structures of Civil Engineering   http://www.lcpc.fr/fr/presentation/organigramme/div_lmsgc/The UMR Navier - LMSGC brings together mechanics and physicists, modellers and experimenters around the science of porous, heterogeneous and granular civil engineering materials. Research is supported by major technological equipment.The Magnetic Resonance Imager (MRI), which has been in service for 3 years and is managed by the UMR Navier - LMSGC, makes it possible to track the movements of liquids or phase changes within porous materials as well as local distortions of pasty or granular materials.  Director: Philippe CoussotJoint École des Ponts – LCPC centreUnit associated with the CNRS UMR 113 (Cité Descartes)Permanent staff: 47 including 13 doctoral students Micro-mechanics and structural calculations The aim of this first topic is to develop tools for the mechanical behaviour of structures by using scaling methods and the construction of behavioural laws for multi-phase materials. This approach, at stuctural calculation level, shows the mechanical linkages that exist between the component elements of porous or reinforced materials.Trough the multi-year CASTOR project, researchers from the École des Ponts and LCPC are together developing a numerical tool for sizing reinforced geotechnical stuctures by inclusions in the CESAR-LCPC software.  Parc Club de la Haute-Maison2, allée KéplerCité Descartes, 77420 Champs-sur-MarneTél. (33) 1 40 43 54 41 / Fax. (33) 1 40 43 54 50and6-8, av. Blaise Pascal, Cité Descartes, Champs-sur-Marne77455 Marne la Vallée cedex 2Tel. (33) 1 64 15 36 56 Fax. (33) 1 64 15 37 48 Coupled transport in porous media Civil engineering materials (soils, concretes, wood, rocks) are strongly influenced by the transport of humidity, ions or colloids, which can lead to chemical reactions such as the alkali reaction or corrosion. The aim of this second topic is to understand and conduct predictive modelling of the physics of such phenomena, which determine the usage and durability of some materials. For example, we study the drying of porous materials (in removing the salt from historic monuments) cryodepollution of soils, drying of soils by electro-osmosis, or the mechanical effects of concrete swelling caused by chemical reactions. simulation numérique de matériau granulaire Reophysics of pastes and granular media Civil engineering materials are often formed of granular assemblies immersed in a fluid phase (concrete-cement paste, ballast, drilling slurry, powders, paints, etc.). Using discrete numerical simulation and experiments on model or real materials, the aim of this topic is to understand the physical origins, at particle level, and to model the mechanical behaviour of these assemblies using MNR imaging, the UMR Navier - LMSGC is conducting unique experiments in the world enabling it directly to determine mechanical behaviour at the heart of flowing materials. 。