Cit:Salvi.etal:2021
| Autor | Salvi, A.; Menendez, B. |
| Jahr | 2021 |
| Titel | Experimental determination of salt content in artificial weathered samples of sedimentary stones |
| Bibtex | @inproceedings { Salvi.etal:2021,
title = {Experimental determination of salt content in artificial weathered samples of sedimentary stones}, 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 = {89-98}, publisher = {TU Delft Open}, note = {Many well-known techniques allow determine the amount of salt present in a sample, but most of them require its destruction or the extraction of the salt from the sample. In this work, we tested some Non-Destructive-Techniques in order to correlate the amount of salt in a sample with its physical properties.Samples of four sedimentary rocks, commonly used as building stones, have been contaminated with two salts, sodium chloride and sodium sulphate, and with a mixture of both. Some of the contaminated samples have been artificially weathered. Salt contamination and weathering methodologies are based on those proposed by the RILEM Technical Committee TC 271-ASC (see Lubelli et al. paper in this conference, [1], [2]). After salt precipitation, some of the samples have been measured, and others have experienced more weathering cycles before being measured. Studied stones are Maastricht and Migné limestones, already used in previous work, and Lutetien, Savonnières and Tuffeau limestones commonly used in French monuments of Paris area and Loire valley respectively. Porosities vary from 30 to almost 50%.Contamination and weathering procedures are presented in [1] and [2]. The goal is to obtain a non-uniform salt distribution into the specimen, similar to what is observed in real cases. In tested samples, P -wave velocity has been measured every 5 mm from the evaporation surface of the sample until 50 mm, which is the length of the sample. After that the sample has been split into two parts vertically. One half has been observed by different microscopical techniques, and from the other half, slices have been cut every 5mm. On these slices density and water vapour absorption have been determined by He-pycnometry and with a Multisample Dynamic Moisture Sorption (ProUmid GmbH & Co. KG). A good correlation exists between both parameters and the distance to the surface. We can conclude that these techniques show the highest amount of salt content close to the surface.}, key = {SWBSS 2021}, url = {https://predict.kikirpa.be/wp-content/uploads/2021/12/SWBSS2021_Procedings.pdf}, author = {Salvi, A. and Menendez, B.} } |
| 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 89-98 |
Eintrag in der Bibliographie
| [Salvi.etal:2021] | Salvi, A.; Menendez, B. (2021): Experimental determination of salt content in artificial weathered samples of sedimentary stones. 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 89-98, Webadresse. |  |
Keywords[Bearbeiten]
Salt weathering, soluble salts, limestone, non-destructive techniques
Abstract[Bearbeiten]
Many well-known techniques allow determine the amount of salt present in a sample, but most of them require its destruction or the extraction of the salt from the sample. In this work, we tested some Non-Destructive-Techniques in order to correlate the amount of salt in a sample with its physical properties.
Samples of four sedimentary rocks, commonly used as building stones, have been contaminated with two salts, sodium chloride and sodium sulphate, and with a mixture of both. Some of the contaminated samples have been artificially weathered. Salt contamination and weathering methodologies are based on those proposed by the RILEM Technical Committee TC 271-ASC (see Lubelli et al. paper in this conference, [1], [2]). After salt precipitation, some of the samples have been measured, and others have experienced more weathering cycles before being measured. Studied stones are Maastricht and Migné limestones, already used in previous work, and Lutetien, Savonnières and Tuffeau limestones commonly used in French monuments of Paris area and Loire valley respectively. Porosities vary from 30 to almost 50%.
Contamination and weathering procedures are presented in [1] and [2]. The goal is to obtain a non-uniform salt distribution into the specimen, similar to what is observed in real cases. In tested samples, P -wave velocity has been measured every 5 mm from the evaporation surface of the sample until 50 mm, which is the length of the sample. After that the sample has been split into two parts vertically. One half has been observed by different microscopical techniques, and from the other half, slices have been cut every 5mm. On these slices density and water vapour absorption have been determined by He-pycnometry and with a Multisample Dynamic Moisture Sorption (ProUmid GmbH & Co. KG). A good correlation exists between both parameters and the distance to the surface. We can conclude that these techniques show the highest amount of salt content close to the surface.