Show simple item record

dc.contributor.authorBaptista Neto, Jose Antonio
dc.contributor.authorGaylarde, Christine
dc.contributor.authorBeech, Iwona
dc.contributor.authorSmith, Bernard J.
dc.contributor.authorMcAlister, John J.
dc.date.accessioned2021-10-12T17:51:28Z
dc.date.available2021-10-12T17:51:28Z
dc.date.issued2020-04
dc.identifier.citationBaptista Neto, JA, Gaylarde, C., Beech, I., J. Smith, B., & J. McAlister, J.. (2020). Degradation of gneiss and granite on the facades of historic buildings in the center of Rio de Janeiro. Systems & Management, 15 (1), 80–90. https://doi.org/10.20985/1980-5160.2020.v15n1.1621en_US
dc.identifier.issn1980-5160
dc.identifier.urihttps://scholarworks.montana.edu/xmlui/handle/1/16491
dc.description.abstractThe majority of the cultural heritage built in Rio de Janeiro, Brazil, is made of gneiss or granite, and exposition of the facades to the polluted environment leads to strong degradation. In order to understand these weathering processes, five historic buildings in the city were studied. The selected historic buildings studied exhibited iron staining, granular disintegration, blistering, incipient fractures and contour scaling, and black crust development. Samples collected from these buildings were examined in an attempt to understand the mechanisms of surface weathering. Rock samples were collected from areas that exhibited serious symptoms of stone decay. The anion and cation content of the building materials was evaluated by AA spectrometry and Ion Chromatographic analysis. The samples were also studied by Field-Emission SEM, petrographic analysis and for their biological content by SEM and DNA analysis using Illumina Mi-Seq Next Generation Sequencing. All the chemical analyses showed high concentrations of soluble salts, such as halite and gypsum, which play a very important role in stonework weathering. FE-SEM with EDS analysis allowed the detection within the rock of sparse filamentous fungi, groups of bacterial cells, rare diatoms and, especially interesting, filamentous photosynthetic bacteria encrusted with re-precipitated gypsum, showing the participation of microorganisms in stone degradation.en_US
dc.language.isoen_USen_US
dc.rights© This final published version is made available under the CC-BY 4.0 license.en_US
dc.rights.urihttps://creativecommons.org/licenses/by/4.0en_US
dc.titleDegradation of gneiss and granite on the facades of historic buildings in downtown Rio de Janeiroen_US
dc.typeArticleen_US
mus.citation.extentfirstpage80en_US
mus.citation.extentlastpage90en_US
mus.citation.issue1en_US
mus.citation.journaltitleSystems & Managementen_US
mus.citation.volume15en_US
mus.identifier.doi10.20985/1980-5160.2020.v15n1.1621en_US
mus.relation.collegeCollege of Engineeringen_US
mus.relation.departmentCenter for Biofilm Engineering.en_US
mus.relation.universityMontana State University - Bozemanen_US
mus.data.thumbpage4en_US


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record

© This final published version is made available under the CC-BY 4.0 license.
Except where otherwise noted, this item's license is described as © This final published version is made available under the CC-BY 4.0 license.

MSU uses DSpace software, copyright © 2002-2017  Duraspace. For library collections that are not accessible, we are committed to providing reasonable accommodations and timely access to users with disabilities. For assistance, please submit an accessibility request for library material.