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Journal of Building Physics 2013 vol. 36 no. 4 353-374.
Hannelore Derluyn, Michele Griffa, David Mannes, Iwan Jerjen, Jan Dewanckele, Peter Vontobel, Adrian Sheppard, Dominique Derome, Veerle Cnudde, Eberhard Lehmann, Jan Carmeliet.
Swiss Federal Laboratories for Materials Science and Technology, EMPA, Dübendorf, Switzerland and
Spallation Neutron Source Division, Paul Scherrer Institute (PSI), Villigen, Switzerland and
Department of Geology and Soil Science – SGIG/UGCT, Ghent University, Ghent, Belgium and
Department of Applied Mathematics, Research School of Physics & Engineering, Australian National University, Canberra, ACT, Australia
Abstract
Samples of Savonnières limestone subjected to repeated wetting–drying cycles were investigated by both neutron radiography and X-ray micro-tomography to collect information on saline uptake and salt precipitation. Capillary uptake of water, 1.4 molal sodium sulphate and 5.8 molal sodium chloride solution was visualized with neutron radiography. The liquid penetration coefficients and diffusivities were determined and are markedly lower for the salt solutions than for water, due to the higher surface tension and viscosity of salt solutions. Halite distributions were derived from neutron radiographs. Porosity analysis of X-ray tomographic datasets allowed quantifying thenardite distributions and porosity decrease due to salt crystallization.
Additional Information
The corresponding author is currently affiliated with Ghent University. Contact details are:
Dr. ir. Hannelore Derluyn
Department of Geology and Soil Science
Ghent University
Krijgslaan 281 S8 9000 Gent, Belgium
Phone: +32 (0)9 264 4650
Email: [email protected]
