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The objective of this study was evaluation of the photocatalytic performance of the addition of n-TiO 2 in white cement mortars in terms of the light reflection (evaluated by CIE L*a*b* scale) and reflectance of the mortar surfaces exposed to solar radiation in an urban environment. Are produced specimens of 1.2m × 1.2m with n-TiO 2 additions of 1%, 5%, and 10% concerning to the total dry powder mass. The performances of the specimens were then compared with two sets without n-TiO 2 , painted and unpainted, and these were used as references. To conduct an in-situ experiment, the mortars were mixed and applied by a mason. After 41 months of exposure and washing of the specimens, the painted mortars and the mortars with the addition of different n-TiO 2 contents exhibited a statistically equivalent reflectance under exposure to solar radiation. All specimens exhibited color differences resulting from: (i) the accumulation of dirt on the surface; (ii) an increase in the surface roughness of the specimens; and (iii) a decrease in rainfall over the duration of exposure.
Sergio Roberto Andrade Dantas. 2019. \u201cPhotocatalytic Performance of White Cement Mortars Exposed in Urban Atmosphere\u201d. Global Journal of Research in Engineering - C: Chemical Engineering GJRE-C Volume 19 (GJRE Volume 19 Issue C2): .
Crossref Journal DOI 10.17406/gjre
Print ISSN 0975-5861
e-ISSN 2249-4596
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Total Score: 103
Country: Brazil
Subject: Global Journal of Research in Engineering - C: Chemical Engineering
Authors: Sergio Roberto Andrade Dantas, Fulvio Vittorino, Kai Loh (PhD/Dr. count: 0)
View Count (all-time): 228
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Publish Date: 2019 10, Wed
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The objective of this study was evaluation of the photocatalytic performance of the addition of n-TiO 2 in white cement mortars in terms of the light reflection (evaluated by CIE L*a*b* scale) and reflectance of the mortar surfaces exposed to solar radiation in an urban environment. Are produced specimens of 1.2m × 1.2m with n-TiO 2 additions of 1%, 5%, and 10% concerning to the total dry powder mass. The performances of the specimens were then compared with two sets without n-TiO 2 , painted and unpainted, and these were used as references. To conduct an in-situ experiment, the mortars were mixed and applied by a mason. After 41 months of exposure and washing of the specimens, the painted mortars and the mortars with the addition of different n-TiO 2 contents exhibited a statistically equivalent reflectance under exposure to solar radiation. All specimens exhibited color differences resulting from: (i) the accumulation of dirt on the surface; (ii) an increase in the surface roughness of the specimens; and (iii) a decrease in rainfall over the duration of exposure.
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