Cit:Aly-Mohamed.etal:2014

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Autor Aly, N. and Gomez-Heras, M. and Hamed, A. and Alvarez de Buergo, M. and Soliman, F.
Jahr 2014
Titel Porosity changes after different temperature regimes for a salt weathering simulation test on Mokkattam limestone (Egypt)
Bibtex
DOI 10.5165/hawk-hhg/243
Link Datei:18 SWBSS-2014 Aly-Mohamed etal.pdf
Bemerkungen In: De Clercq, Hilde (editor): Proceedings of SWBSS 2014. Third International Conference on Salt Weathering of Buildings and Stone Sculptures Royal Institute for Cultural Heritage, Brussels, Belgium, 14-16 October 2016, S. 247-257


Eintrag in der Bibliographie

[Aly-Mohamed.etal:2014]Aly, N.; Gomez-Heras, M.; Hamed, A.; Alvarez de Buergo, M.; Soliman, F. (2014): Porosity changes after different temperature regimes for a salt weathering simulation test on Mokkattam limestone. In: Hilde De Clercq (Hrsg.): Proceedings of SWBSS 2014 3rd International Conference on Salt Weathering of Buildings and Stone Sculptures,KIK-IRPA, Royal Institute for Cultural Heritage, Brussels 247-257, 10.5165/hawk-hhg/243Link zu Google ScholarLink zum Volltext

Keywords[Bearbeiten]

stone decay, limestone, salt weathering, pore structure

Abstract[Bearbeiten]

This study deals with the characterization of the pore structure of fresh quarry limestone samples belonging to the Mid-Eocene Mokattam Group, and porosity changes in samples subjected to salt crystallization tests at different temperatures (20, 30 and 40 °C) in a purpose-made simulation chamber based on feeding samples by capillary imbibitions. NaCl with fixed concentration (10%) was used in the different experimental tests. One more experiment was performed using only distilled water to discriminate changes due to salt crystallisation from those resulting just from wetting. In order to characterize the changes of the pore structure, fresh and weathered samples subjected to different temperature regimes tests were investigated by means of Mercury Intrusion Porosimetry (MIP), and Scanning Electron Microscopy (SEM). These results show the critical role of temperature in controlling the porosity changes after salt crystallisation.

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