Performance evolution of hydrophobic treatments for stone conservation investigated by MRI

1H-MRI has been applied to the evaluation of the performances of a hydrophobic polymer (Paraloid B72), widely used for the conservation of monumental buildings and other stone artifacts. By this technique it has been possible to visualize the water diffusion in a treated rock material (Pietra di Lec...

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Bibliographic Details
Published in:Magnetic resonance imaging 2001-04, Vol.19 (3), p.513-516
Main Authors: Borgia, G.C., Bortolotti, V., Camaiti, M., Cerri, F., Fantazzini, P., Piacenti, F.
Format: Article
Language:English
Subjects:
Acrylic polymer
Ageing
Biological and medical sciences
Calcium Carbonate - chemistry
Diffusion
Hydrophobic properties
Investigative techniques, diagnostic techniques (general aspects)
Magnetic Resonance
Magnetic Resonance Imaging - methods
Medical sciences
Miscellaneous. Technology
Physical Phenomena
Physics
Polymer distribution
Polymers
Radiodiagnosis. Nmr imagery. Nmr spectrometry
Stone conservation
Water
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Summary:1H-MRI has been applied to the evaluation of the performances of a hydrophobic polymer (Paraloid B72), widely used for the conservation of monumental buildings and other stone artifacts. By this technique it has been possible to visualize the water diffusion in a treated rock material (Pietra di Lecce, a highly porous Italian biocalcarenite) and then indirectly the spatial distribution of the polymer in the rock. The effects of wetting-drying cycles on the hydrophobic efficacy of the acrylic polymer in the inner layers of the rock were also studied. A notable decrease in the water-repellence inside the stone was detected and attributed to a loss of adhesion of the polymer to the substrate, promoted by the action of water.
ISSN:0730-725X
1873-5894
DOI:10.1016/S0730-725X(01)00281-8