Photocatalytic Performance of White Cement Mortars Exposed in Urban Atmosphere

Sergio Roberto Andrade Dantas; Fulvio Vittorino; Kai Loh

Photocatalytic Performance of White Cement Mortars Exposed in Urban Atmosphere

Sergio Roberto Andrade Dantas * §

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Fulvio Vittorino §

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Kai Loh

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§ Polytechnic School of SÃ£o Paulo University

Photocatalytic Performance of White Cement Mortars Exposed in Urban Atmosphere

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Abstract

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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Funding

No external funding was declared for this work.

Conflict of Interest

The authors declare no conflict of interest.

Ethical Approval

No ethics committee approval was required for this article type.

Data Availability

Not applicable for this article.

How to Cite This Article

Sergio Roberto Andrade Dantas, Fulvio Vittorino, Kai Loh. 2019. "Photocatalytic Performance of White Cement Mortars Exposed in Urban Atmosphere". Global Journal of Research in Engineering - C: Chemical Engineering GJRE-C Volume 19 (GJRE Volume 19 Issue C2).

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GJRE Volume 19 Issue C2

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Journal Specifications

Crossref Journal DOI 10.17406/gjre

Print ISSN 0975-5861

e-ISSN 2249-4596

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Classification

GJRE-C Classification FOR Code: 861001

Submission ReceivedDecember 7, 2018
Peer Review Double Blind
Handling Editor
Accepted January 2, 2019
Published October 9, 2019

Version of record

v1.2

Issue date

October 9, 2019

Language

English

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Article Matrices

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)

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Publish Date: 2019 01, Tue

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