Mineralogical study of the deterioration of granite stones of two Portugueses churches and characterization of the salt solutions in the porous network by the presence of diatoms

• Tipo: Artigo em Revista Científica Internacional
• Data: 2009

Autores

Arlindo Begonha (Autor) FEUP

Revista

Título: Materials Characterization

Páginas: 621-635

ISSN: 1044-5803

Editora: Elsevier

Indexação

ISI Web of Knowledge - 9 Citações

ISI Web of Science

Scopus - 11 Citações

INSPEC

COMPENDEX

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Outras ciências da engenharia e tecnologias

CORDIS: Ciências Tecnológicas > Engenharia > Engenharia civil

Outras Informações

ID Authenticus: P-003-HYZ

DOI: 10.1016/j.matchar.2008.12.019

Abstract (EN): Two Portuguese churches were built with stones of different types of two-mica fine to coarse grained granites. The stones in both monuments were previously submitted to a natural weathering process in the quarries leading to a homogeneous and very well interconnected porous network composed of very thin fissures, allowing a fast capillary transfer of rain water and salt solutions. Therefore, the stones presently exhibit several types of stone decay. A mineralogical study of the deteriorations was carried out in the two churches that permitted the identification of several minerals of soluble salts responsible for stone decay. Some forms of diatoms have been identified in samples of deteriorated stones in both monuments. Several ions in the salt solutions present in the porous networks of the granites, which are in conformity with the minerals of soluble salts associated with the deterioration of the granite, permit the development of several forms of diatoms.

Idioma: Inglês

Tipo (Avaliação Docente): Científica