E-Publication DOI

Performance of limestone laden with sodium sulphate and sodium nitrate

De Clercq, H.; Jovanovic, M.; Hendrickx, S.; Vanhellemont, Y.; Roels, S.; Steiger, M.; Linnow, K.

Jahr: 2011

Datei zum Herunterladen: PDF (10 pages, 0.82 MB)

Beschreibung:
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.

Zitation:
De Clercq, H.; Jovanovic, M.; Hendrickx, S.; Vanhellemont, Y.; Roels, S.; Steiger, M.; Linnow, K.:
Performance of limestone laden with sodium sulphate and sodium nitrate. University of Cyprus, Department of Civil and Environmental Engineering, Building Materials & Ledra Laboratories 2011
doi:10.5165/hawk-hhg/saltwiki/27