Condensazione e trasporto di acqua nelle rocce: la Risonanza Magnetica Nucleare per la caratterizzazione della struttura porosa e la valutazione del contenuto di umidità

Nuclear Magnetic Resonance (NMR) techniques, both Magnetic Resonance Imaging (MRI) and Magnetic Resonance Relaxometry (MRR), are demonstrated to be excellent tools for studying the condensation and transport of water in rocks which are high ratio surface/volume systems. In this work two examples of laboratory application of NMR techniques to the field of stone conservation have been presented. In particular, the spatially resolved techniques (MRI) have been used for evaluating the penetration depth of a hydrophobic-consolidating treatment on a calcareous stone (Maastricht stone), while the spatially not-resolved techniques (MRR) have been applied for evaluating the effect of porous structure on the condensation kinetics of water in stones polluted with a hygroscopic salt, calcium nitrate.