Porosity measurements of weathered granitic material: the computerized tomography used

The methodology of porosity analysis developed here used classical techniques such as mercury injection porosimetry and SEM and a new technique assisted tomography. We have analyzed porosity of wheathered sample on different scales and we have defined the porous geometry and distribution in this sample. On the basis of results, we have quantified the porosity evolution and we have pointed out the influence of thresholds in quartz and plagioglase grains on the flow of water