Influence of surface roughness on color changes in building stones
| Autor: | Rafael Fort, Valentín Viqueira, Salvador Ordóñez, C. Illueca, A. Bernabeu, David Benavente, Francisco M. Martínez-Verdú, M. A. García del Cura |
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| Přispěvatelé: | Universidad de Alicante. Departamento de Óptica, Farmacología y Anatomía, Visión y Color, Petrología Aplicada |
| Rok vydání: | 2003 |
| Předmět: |
Engineering
business.industry General Chemical Engineering 0211 other engineering and technologies Aesthetics Human Factors and Ergonomics 02 engineering and technology General Chemistry 01 natural sciences Civil engineering Preservation 010309 optics Color changes Spectrophotometry Restoration 021105 building & construction 0103 physical sciences Architecture Surface roughness business Óptica |
| Zdroj: | RUA. Repositorio Institucional de la Universidad de Alicante Universidad de Alicante (UA) |
| Popis: | The influence of surface roughness on color change in several Spanish building stones is studied in samples of the following: Red Alicante, Black Marquina, White Macael, and Yellow Triana. In an experimental laboratory test (acid attack), we simulated the weathering process and made a comparative analysis between this and the polishing process. Changes in both color and roughness were measured during these processes. In limestones with medium or high chroma (Red Alicante) and both low chroma and lightness (Black Marquina), the total color changes were particularly affected in both the polishing and acid attack processes. On the other hand, in marbles with both low chroma and high lightness (White Macael and Yellow Triana), the total color changes were almost imperceptible in both processes. However, no change occurred in the hue of any of the analyzed stones. Spectrophotometric data showed that color change was due mainly to changes in surface roughness and not to chemical reactions that may have altered the oxidation state of the chromophore in the chromogen of the stone. Contract grant sponsor: Research Project GV-97-RN-14-3 Contract grant sponsor: predoctoral research fellowship from Generalitat Valenciana awarded to D. Benavente. |
| Databáze: | OpenAIRE |
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