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- Title
CARACTERIZAÇÃO TECNOLÓGICA DE ALGUNS LITOTIPOS DO ESPÍRITO SANTO E DO NORDESTE E SUA APLICABILIDADE COMO ROCHAS ORNAMENTAIS.
- Authors
de Oliveira, Glenda Aparecida Rodrigues; da Costa Oliveira, Felisbela Maria; Martins Araújo, Alinne Marianne; Campos Barros, Márcio Luiz de Siqueira
- Abstract
Petrographic features and physical and mechanical properties of seven rock types gray and yellow from Espirito Santo (Andorinha Gray, Corumbá Gray, Arabesco, and Santa Cecilia) and from the Northeast (Pocinhos Gray, Corumbá Gray and Yellow Ipanema) were determined to evaluate the use of these rocks as coatings, depending on the environment and applications. Physical indices, resistance to compression, to bending, and Amsler wear were determined byt NBR 15845/ABNT and NBR 12042/ABNT. The properties of the gray rocks, regardless of their origin, are compatible with NBR 15844, to granitic rocks, and ASTM C 615 (US). However, yellow rocks presented values very close to the limits of the standard: yellow color is a sign of change processes (oxidation, hidroxidation, hydration), mainly ferromagnesian minerals, which decrease the resistance to compressive and flexural strength, through increased porosity and water absorption. Most rocks have values suitable for use as a coating, with restrictions for yellow rocks, which require waterproofing when using it in humid areas.
- Publication
Tecnologia em Metalurgia, Materiais e Mineração, 2017, Vol 14, Issue 2, p125
- ISSN
2176-1515
- Publication type
Article
- DOI
10.4322/2176-1523.1140