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Rock Finishing and Response to Salt Fog Atmosphere

Silva, Zenaide CG ; Simao, Joaquim AR ; Sa, Maria Helena ; Leal, Nuno

Key engineering materials, 2013-04, Vol.548, p.275-286 [Periódico revisado por pares]

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Título:
Rock Finishing and Response to Salt Fog Atmosphere
Autor: Silva, Zenaide CG ; Simao, Joaquim AR ; Sa, Maria Helena ; Leal, Nuno
Assuntos: Atmospheres ; Finishing ; Fog ; Polished ; Porosity ; Rock ; Surface layer ; Texture
É parte de: Key engineering materials, 2013-04, Vol.548, p.275-286
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
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Descrição: Seven silicate rocks used as ornamental stones and having different surface finishing were submitted to salt fog atmospheres in order to compare different susceptibilities to alteration. Polished, honed, hammered and flamed finishing types were tested. Rocks come from Portugal, Brazil and Angola and are widely commercialized. Samples covered quartz rich rocks, silica saturated and undersaturated rocks, mono and plurimineralic rocks, coarse and fine grained rocks. Mineral composition, texture and open porosity showed to be important parameters which determine mass loss among samples, but the finishing type was very effective within samples. Mass loss and porosity increase are higher on hammered samples, contrasted with the lowest loss values on polished samples. The effect of surface hydrophobicity and roughness on the samples having polished finishing was also analysed by atomic force microscopy (AFM) and water contact angle (WCA), indicating that texture and mineral diversity influence the hydrophobic character of the rock surfaces.
Idioma: Inglês

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Rock Finishing and Response to Salt Fog Atmosphere

Silva, Zenaide CG ; Simao, Joaquim AR ; Sa, Maria Helena ; Leal, Nuno

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