Impacto do intemperismo no arenito de revestimento do Teatro Municipal de São Paulo

Authors

  • Eliane Aparecida Del Lama Universidade de São Paulo; Instituto de Geociências; Departamento de Mineralogia e Geotectônica
  • Gergely Andres Julio Szabó Universidade de São Paulo; Instituto de Geociências; Departamento de Mineralogia e Geotectônica
  • Lauro Kazumi Dehira Instituto de Pesquisas Tecnológicas; Seção de Geotecnia; Centro de Tecnologia de Obras de Infra-estrutura
  • Yushiro Kihara Universidade de São Paulo; Instituto de Geociências; Departamento de Mineralogia e Geotectônica

DOI:

https://doi.org/10.5327/Z1519-874x2008000100006

Keywords:

Municipal Theater, sandstone, Itararé, Ipanema, weathering, São Paulo

Abstract

The Municipal Theater is one of the post cards of São Paulo city. It was built in 1911 and its frontal façade is revested with Itararé Sandstone. This sandstone comes from the Flona de Ipanema (Ipanema National Forest) area, located in Iperó, São Paulo State. Formerly this place included the Royal Ipanema Iron Factory, and nowadays it is a historical, archaeological and natural heritage site. The theatre façade is quite deteriorated due to the petrographic composition of the rock. The Itararé Sandstone is stratified with sigmoidal features and with grain size ranging from fine to coarse. Petrographically it is a feldspathic sandstone with clayey matrix in variable proportions. X-ray diffractometry analyses revealed that this matrix is constituted mainly by clay minerals of the smectite group with additional contributions of chlorite and illite. Mercury porosimetry shows that the porosity ranges from 10% to 18%. Mapping of the façade identified the following alteration forms: biological colonization, concretion, erosion, peeling, fissure, incrustation, open joint, spalling, stain, plaque, plaquette and vegetation. The industrialization and city growth did not play a significant role in the alteration of the building stone of the São Paulo Municipal Theater. Instead, this process is intrinsic to the petrographic characteristics (presence of expansive clay minerals, high porosity) and structure of the sandstone utilized, making it unsuitable as building stone.

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Published

2008-04-01

Issue

Vol. 8 No. 1 (2008)

Section

Articles

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How to Cite

Del Lama, E. A., Szabó, G. A. J., Dehira, L. K., & Kihara, Y. (2008). Impacto do intemperismo no arenito de revestimento do Teatro Municipal de São Paulo . Geologia USP. Série Científica, 8(1), 75-86. https://doi.org/10.5327/Z1519-874x2008000100006