Transfert properties of geo materials natural or not (concrete, clay, tight gas rocks, and so on) take a major place in conception and monitoring of civil engineering work. Permeability and diffusivity are main properties to mesure as soon we study troubles relative to long term storage of wastes or harmful substance, aging of nuclear powerplants or flows in porous media for oil ans environmental sectors.

     Specifications for study of containment structures need maximal level for permeability or for diffusivity. Especially, when storage must be long-lasting, variation of those properties become a major goal link to time, chemical, mechanical, thermal or hydric stress.

      Measures and monitoring of permeability and diffusivity variations as a function of chemical, mechanical or thermal stress are essential to characterize geo materials and give inputs to feed predictive models. Experience let us show that it is a sensitive issue. Otherwise, cracking after excavation or most aging nuclear power plants containment alters significantly transfert properties of geo materials. Depending on fluid type (water or gas) flowing throw damage zone, cracks may self heal.

     This conference hosted by GEOM's team of LaMCUBE lab aim to give some reponse to ingeneers, industrialist, site supervisor ans searchers considerations interested in measures of geo materials transfert properties in situ or in laboratory, their evolution according to mechanical, thermal and chemical stress and by modelisations linked to.