| Full text | |
| Author(s): |
Grossi, Danielle
[1]
;
Del Lama, Eliane Aparecida
[1]
;
Garcia-Talegon, Jacinta
[2]
;
Inigo, Adolfo Carlos
[3]
;
Vicente-Tavera, Santiago
[4]
Total Authors: 5
|
| Affiliation: | [1] Univ Sao Paulo, Inst Geociencias, Rua Lago 562, BR-05508080 Sao Paulo - Brazil
[2] Univ Salamanca, Fac Ciencias, Dpto Geol, E-37008 Salamanca - Spain
[3] Inst Recursos Nat & Agrobiol Salamanca IRNASA CSI, Salamanca 37008 - Spain
[4] Univ Salamanca, Fac Econ, Dpto Estadist, E-37008 Salamanca - Spain
Total Affiliations: 4
|
| Document type: | Journal article |
| Source: | INTERNATIONAL JOURNAL OF CONSERVATION SCIENCE; v. 6, n. 3, p. 313-322, JUL-SEP 2015. |
| Web of Science Citations: | 13 |
| Abstract | |
Itaquera Granite, as a building stone material, was widely used in the early 20th centztly for the construction of buildings and monuments in the centre of the city of Sao Paulo, Brazil. The color variation of the Itaquera Granite of the Ramos de Azevedo Monument was monitored for two years and these data were compared with those obtained for fresh stone originated from a historic quarry. The oxidation of iron-rich minerals present in this granite, coupled with pollution (high levels of 03), biological colonization, leaching of bronze, and the dissolution and reprecipitation of mortar, causes calorimetric changes in the stone. Measurements were also performed on zones of the monument with pathologies. Two statistical Canonical Biplot analyses were made on the data of chromatic coordinates monitored (L{*}, a{*}, b{*}, C{*} and H{*}): orientation/year and orientation/pathologies. The results obtained for the chromatic variation in the monzunent are primarily related to yellowing caused by deposition of atmospheric pollutants and weathering of iron-rich minerals. (AU) | |
| FAPESP's process: | 09/02519-8 - Applied mineralogy to the study of cultural heritage |
| Grantee: | Eliane Aparecida Del Lama |
| Support Opportunities: | Regular Research Grants |
| FAPESP's process: | 11/03728-0 - Ramos de Azevedo monument conservation status analysis with the use of non-destructive methods |
| Grantee: | Danielle Grossi |
| Support Opportunities: | Scholarships in Brazil - Master |