Title
Moisture and salt transport in three-layer plaster/substrate systems
Author
Petković, J.
Huinink, H.P.
Pel, L.
Kopinga, K.
van Hees, R.P.J.
TNO Bouw en Ondergrond
Publication year
2010
Abstract
We have investigated whether a plaster which has two plaster layers with different pore sizes can act as a salt accumulating plaster system, in which salt crystallizes in the base layer of the plaster and not in the substrate or at the external surface. We used two substrates; fired-clay brick and Bentheim sandstone. On the substrate we applied two plaster layers, of which the first (base) plaster layer has pores that are significantly smaller than the pores of the second (external) plaster layer. These systems were either saturated with pure water or a NaCl solution. The moisture and salt transport during drying were investigated with a Nuclear Magnetic Resonance technique. In our experiments, only a system consisting of a coarse porous gypsum layer and a fine porous lime-cement layer on a Bentheim sandstone showed, under certain conditions, salt accumulation in the base layer. © 2009 Elsevier Ltd. All rights reserved.
Subject
Building Engineering & Civil Engineering
BM - Building Materials
TS - Technical Sciences
Materials
Built Environment
Layered systems
Nuclear magnetic resonance
Plaster
Porous materials
Salt transport
Base layers
Bentheim sandstones
Clay bricks
Different pore sizes
External surfaces
Gypsum layer
Layered systems
NaCl solution
Nuclear magnetic resonance techniques
Pure water
Salt transport
Three-layer
Clay minerals
Gypsum
Moisture
Nuclear magnetic resonance
Nuclear magnetic resonance spectroscopy
Porous materials
Resonance
Sandstone
Sodium chloride
Substrates
Plaster
To reference this document use:
http://resolver.tudelft.nl/uuid:c68a05ad-c546-4a65-9119-89e73121d1f1
TNO identifier
279959
ISSN
0950-0618
Source
Construction and Building Materials, 24 (1), 118-127
Document type
article