Imaging of reactive transport in fractured cement-based materials with X-ray CT

The need to improve the understanding of properties cement-based materials calls for development tools visualizing and quantifying chemical reactions flows fluids within them. In this paper, we report results an experimental study where a sample fractured cement-paste was subjected injection (krypton, CO2 water) imaged simultaneously by X-ray computed tomography (CT). Initial porosity estimated using subtraction method based on CT scans taken initially during krypton injection. reconstructions were segmented visualize crack patterns fluid flow in three-dimensions quantify evolution experiment. show that captures formation carbonate phase injection, water media. We reduction resulting from carbonation reaction. observe newly formed carbonated layer impedes and, locally, can lead healing. demonstrate ability image reactive transport materials, support feasibility imaging tool their characterization.