An analytical comparison of two commercial consolidating products applied to eocene sandstones from 16th and 19th century monuments in San Sehastián, northern Spain
The conservation of buildings in the Basque Country made of Eocene sandstone is somewhat problematical, because this type of rock is relatively unstable. This instability is due to the variable content of carbonate cement (0-28%) and the presence of K-feldspar grains (1-13%) which appear to have bee...
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| Format: | Article |
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Consejo Superior de Investigaciones Científicas
2002-06-01
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| Series: | Materiales de Construccion |
| Subjects: | |
| Online Access: | http://materconstrucc.revistas.csic.es/index.php/materconstrucc/article/view/331 |
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| author | F. García-Garmilla I. Rodríguez Maribona M. Cano M. Zalbide J. A. Ibáñez-Gómez E. Osa-Chans S. Garín |
| author_facet | F. García-Garmilla I. Rodríguez Maribona M. Cano M. Zalbide J. A. Ibáñez-Gómez E. Osa-Chans S. Garín |
| author_sort | F. García-Garmilla |
| collection | DOAJ |
| description | The conservation of buildings in the Basque Country made of Eocene sandstone is somewhat problematical, because this type of rock is relatively unstable. This instability is due to the variable content of carbonate cement (0-28%) and the presence of K-feldspar grains (1-13%) which appear to have been dissolved by both diagenetic and environmental processes. We have compared the results of the application of two commercial consolidating products: Sicof SM 296 (product A) and Consistone FS-hA (product B), both ethylsilicates, on Eocene sandstones of the Oquendo Admiral House (16th century) and the Gipuzkoa Provincial Government Palace (19th century), which are both located in the city of San Sebastián (Province of Gipuzkoa, Basque Country, Northern Spain). On the basis of different chemical and physical laboratory tests, together with Scanning Electron Microscopy (SEM) analysis, product A seems to be more efficient in consolidating such Eocene sandstone materials, since it penetrates into the first 8 mm of the rock, occupies very homogeneously even the smallest pore spaces and leaves a certain degree of remaining porosity which allows ventilation of the rock. In contrast, product B seems to be more appropriate for larger pore-sized rocks, because it only penetrates into the first 3 mm of the Eocene sandstone samples due to the thin pores of the matter. Our results demonstrate that the suitability of a commercial product depends not only on its own chemical composition, but also on the textural and lithological features of the rock material upon which it is to be applied. |
| first_indexed | 2024-12-14T22:40:00Z |
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| id | doaj.art-b8fd3632dc4a4c5f887388e8b77065dd |
| institution | Directory Open Access Journal |
| issn | 0465-2746 1988-3226 |
| language | English |
| last_indexed | 2024-12-14T22:40:00Z |
| publishDate | 2002-06-01 |
| publisher | Consejo Superior de Investigaciones Científicas |
| record_format | Article |
| series | Materiales de Construccion |
| spelling | doaj.art-b8fd3632dc4a4c5f887388e8b77065dd2022-12-21T22:45:00ZengConsejo Superior de Investigaciones CientíficasMateriales de Construccion0465-27461988-32262002-06-015226651810.3989/mc.2002.v52.i266.331315An analytical comparison of two commercial consolidating products applied to eocene sandstones from 16th and 19th century monuments in San Sehastián, northern SpainF. García-Garmilla0I. Rodríguez Maribona1M. Cano2M. Zalbide3J. A. Ibáñez-Gómez4E. Osa-Chans5S. Garín6'Universidad del País Vasco. Facultad de Ciencias. Dpto. Mineralogía y PetrologíaLABEIN, Dpto. de Construcción y MaterialesLABEIN, Dpto. de Construcción y MaterialesLABEIN, Dpto. de Construcción y MaterialesLABEIN, Dpto. de Construcción y MaterialesTEUSA TECPROPASA EUSKADI S.ATEUSA TECPROPASA EUSKADI S.AThe conservation of buildings in the Basque Country made of Eocene sandstone is somewhat problematical, because this type of rock is relatively unstable. This instability is due to the variable content of carbonate cement (0-28%) and the presence of K-feldspar grains (1-13%) which appear to have been dissolved by both diagenetic and environmental processes. We have compared the results of the application of two commercial consolidating products: Sicof SM 296 (product A) and Consistone FS-hA (product B), both ethylsilicates, on Eocene sandstones of the Oquendo Admiral House (16th century) and the Gipuzkoa Provincial Government Palace (19th century), which are both located in the city of San Sebastián (Province of Gipuzkoa, Basque Country, Northern Spain). On the basis of different chemical and physical laboratory tests, together with Scanning Electron Microscopy (SEM) analysis, product A seems to be more efficient in consolidating such Eocene sandstone materials, since it penetrates into the first 8 mm of the rock, occupies very homogeneously even the smallest pore spaces and leaves a certain degree of remaining porosity which allows ventilation of the rock. In contrast, product B seems to be more appropriate for larger pore-sized rocks, because it only penetrates into the first 3 mm of the Eocene sandstone samples due to the thin pores of the matter. Our results demonstrate that the suitability of a commercial product depends not only on its own chemical composition, but also on the textural and lithological features of the rock material upon which it is to be applied.http://materconstrucc.revistas.csic.es/index.php/materconstrucc/article/view/331sandstoneseocenehistoric buildingsconsolidationethil-silicates |
| spellingShingle | F. García-Garmilla I. Rodríguez Maribona M. Cano M. Zalbide J. A. Ibáñez-Gómez E. Osa-Chans S. Garín An analytical comparison of two commercial consolidating products applied to eocene sandstones from 16th and 19th century monuments in San Sehastián, northern Spain Materiales de Construccion sandstones eocene historic buildings consolidation ethil-silicates |
| title | An analytical comparison of two commercial consolidating products applied to eocene sandstones from 16th and 19th century monuments in San Sehastián, northern Spain |
| title_full | An analytical comparison of two commercial consolidating products applied to eocene sandstones from 16th and 19th century monuments in San Sehastián, northern Spain |
| title_fullStr | An analytical comparison of two commercial consolidating products applied to eocene sandstones from 16th and 19th century monuments in San Sehastián, northern Spain |
| title_full_unstemmed | An analytical comparison of two commercial consolidating products applied to eocene sandstones from 16th and 19th century monuments in San Sehastián, northern Spain |
| title_short | An analytical comparison of two commercial consolidating products applied to eocene sandstones from 16th and 19th century monuments in San Sehastián, northern Spain |
| title_sort | analytical comparison of two commercial consolidating products applied to eocene sandstones from 16th and 19th century monuments in san sehastian northern spain |
| topic | sandstones eocene historic buildings consolidation ethil-silicates |
| url | http://materconstrucc.revistas.csic.es/index.php/materconstrucc/article/view/331 |
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