Cit:Gulotta.etal:2021

Autor	Gulotta, D.; Godts, S.; De Kock, T.; Steiger, M.
Jahr	2021
Titel	Comparative estimation of the pore filling of single salts in natural stone
Bibtex	@inproceedings { Gulotta.etal:2021, title = {Comparative estimation of the pore filling of single salts in natural stone}, booktitle = {Proceedings of SWBSS 2021 – Fifth International Conference on Salt Weathering of Buildings and Stone Sculptures}, year = {2021}, editor = {Lubelli, B.; Kamat, A.A.; Quist, W.J.}, pages = {79-88}, publisher = {TU Delft Open}, note = {Estimating the pore filling due to salt crystallization in stones is crucial to determine the potential susceptibility to damage. Considering that salts tend to follow the path of least resistance when crystallizing, the pore space needs to be filled for damage to occur. Only when such a condition is achieved, the growing crystals can exert enough pressure against the pore wall to initiate the damage. However, calculating the pore filling is a tedious task and often overlooked. This paper discusses the results of two methodological approaches to estimate the pore filling in Maastricht stone samples subjected to sodium chloride and sodium sulfate contamination. The investigation is part of an ongoing technical committee developing a laboratory test to assess the durability of porous materials to salt crystallization (RILEM Technical Committee 271-ASC). The first method exploits an image analysis approach using scanning electron microscopyon polished crosssections. The second method follows a theoretical approach based on the salt content data determined by ion chromatography, the molar mass and volume of Na2SO4(thenardite) and NaCl, the dry bulk density and o pen porosity of the Maastricht limestone. The deviations observed in the results from the two methods are discussed with respect to the potential methodological issues. Some possible strategies to mitigate such discrepancies are proposed. }, key = {SWBSS 2021}, url = {https://predict.kikirpa.be/wp-content/uploads/2021/12/SWBSS2021_Procedings.pdf }, author = {Gulotta, D. and Godts, S. and De Kock, T. and Steiger, M.} }
DOI
Link
Bemerkungen	in: Lubelli, B.; Kamat, A.A.; Quist, W.J. (Hrsg.): Proceedings of SWBSS 2021 – Fifth International Conference on Salt Weathering of Buildings and Stone Sculptures,TU Delft Open 79-88

Eintrag in der Bibliographie

[Gulotta.etal:2021]

Gulotta, D.; Godts, S.; De Kock, T.; Steiger, M. (2021): Comparative estimation of the pore filling of single salts in natural stone. In: Lubelli, B.; Kamat, A.A.; Quist, W.J. (Hrsg.): Proceedings of SWBSS 2021 – Fifth International Conference on Salt Weathering of Buildings and Stone Sculptures,TU Delft Open 79-88, Webadresse.

Keywords

Salt crystallization, pore filling, image analysis, ionic chromatography, SEM

Abstract

Estimating the pore filling due to salt crystallization in stones is crucial to determine the potential susceptibility to damage. Considering that salts tend to follow the path of least resistance when crystallizing, the pore space needs to be filled for damage to occur. Only when such a condition is achieved, the growing crystals can exert enough pressure against the pore wall to initiate the damage. However, calculating the pore filling is a tedious task and often overlooked. This paper discusses the results of two methodological approaches to estimate the pore filling in Maastricht stone samples subjected to sodium chloride and sodium sulfate contamination. The investigation is part of an ongoing technical committee developing a laboratory test to assess the durability of porous materials to salt crystallization (RILEM Technical Committee 271-ASC). The first method exploits an image analysis approach using scanning electron microscopyon polished crosssections. The second method follows a theoretical approach based on the salt content data determined by ion chromatography, the molar mass and volume of Na₂SO₄ (thenardite) and NaCl, the dry bulk density and open porosity of the Maastricht limestone. The deviations observed in the results from the two methods are discussed with respect to the potential methodological issues. Some possible strategies to mitigate such discrepancies are proposed.

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