A probabilistic approach for assessing c

The work presented here is the first step of a project aiming at developing a predictive model for concrete structures under leaching attack based on a probabilistic approach. For this purpose, a large experimental campaign is being carried out simultaneously with the development of a numerical modelling for leaching. The experimental campaign follows two real building sites, thus the samples for the measures have been moulded as long as the building operation lasted. It aims at first investigating a correlation between measures performed in a laboratory (being mechanical experiments such as compressive or tensile strength or Young modulus, as well as measures of durability indicators like water porosity or Ammonium Nitrate Accelerated Degradation tests) and in situ measurements (such as electrical resistivity). The second goal of the campaign is to find out a statistical variability of characteristics of the material. The second aspect of the study concerns the modelling of calcium leaching using the Finite Volumes Method, and is based upon the results of the above mentioned experimental campaign so as to integrate the variability of the material in the calculation of the long-term behaviour of the structure.