Salt transport in plaster/substrate layers: A nuclear magnetic resonance study
conference paper
The performance of specially developed restoration plasters is not always as good as expected. Salt crystallization is one of the major causes of deterioration. To understand this in more detail, we have investigated how transport in a plaster depends on the underlying masonry material. The transport of moisture and salt during drying of some plaster/substrate systems has been monitored with a Nuclear Magnetic Resonance technique. Moisture and sodium contents have been measured non destructively at different positions in the samples. The drying behaviour differed for the investigated systems, depending on differences in pore structure of plaster and substrate. For a good performance of the plaster a proper matching of the pore-size distribution of the plaster with that of the masonry is required.
Topics
TNO Identifier
330812
Source title
13th International Brick and Block Masonry Conference (IB2MaC), Amsterdam, Netherlands, 4-7 July
Pages
8 p.
Files
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