FraMCoS 7 2010 Jeju, South Korea

Experimental analysis and numerical simulation of permeability evolution in cracking concrete

this paper contributes to the experimental anlysis and numerical simulation of permeability evolution on cracking concrete the studied concrete material, called CEM1, is the potential candidate for the underground storage for nuclear wastes. In the first part, an original experimental…

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Year 2010
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Abstract

this paper contributes to the experimental anlysis and numerical simulation of permeability evolution on cracking concrete the studied concrete material, called CEM1, is the potential candidate for the underground storage for nuclear wastes. In the first part, an original experimental set-up is presented. The evolution of permeability was measured regularly during charge with pulse-test technique. The experimental result showed that the permeability of CEM1 had a significant variation due to the initiation and the devel- opment of volumetric contractance/diatancy and micro-cracking. The permeability increased tens of times when the crack happened. Based on the experimental investigation, the concrete material develops an impor- tant plastic deformation coupled with damage induced by micro-cracks. In view of this, a coupled elastopal- stic damage model is formulated based on elastoplasticity and continuum damage mechanics. Finally, the per- formance of proposed model is evaluated by the simulation of experimental data.