10.5165/HAWK-HHG/SALTWIKI/27
De Clercq, H.
H.
De Clercq
Jovanovic, M.
M.
Jovanovic
Hendrickx, S.
S.
Hendrickx
Vanhellemont, Y.
Y.
Vanhellemont
Roels, S.
S.
Roels
Steiger, M.
M.
Steiger
Linnow, K.
K.
Linnow
Performance of limestone laden with sodium sulphate and sodium nitrate
University of Cyprus, Department of Civil and Environmental Engineering, Building Materials & Ledra Laboratories
2011
Conference paper
Conservation science
HAWK Hildesheim/Holzminden/Göttingen, Hornemann Institut
Hornemann Institut
HAWK Hildesheim/Holzminden/Göttingen
2011
en
http://www.saltwiki.net/index.php?title=SWBSS2011&oldid=2958
978-9963-7355-1-11
10 pages
0.82 MB
PDF
The behaviour of two types of limestones, having different porosity: Maastrichter and Euville,laden with an aqueous solution of an equimolar mixture of sodium sulphate and sodium nitratewas investigated. At 50% RH, the efflorescence on Maastrichter samples drying up to 30 hoursconsisted of similar amounts of thenardite and darapskite in case of an equimolar mixture ofsodium sulphate/sodium nitrate while that on Euville samples under the same conditionscontained mainly darapskite. At 20°C and 85% RH, thenardite was mostly detected in theefflorescence of both Maastrichter and Euville samples. Increasing the RH from 50 to 85%resulted in considerable damage on Maastrichter stone laden with an equimolar mixture ofsodium sulphate/sodium nitrate, most likely as a consequence of high supersaturation ofmirabilite.