Impact of Incorporating NIR Reflective Pigments in Finishing Coatings of ETICS
Near-infrared (NIR) reflective materials are being developed for mitigating building cooling needs. Their use contributes to broadening the range of colours, responding to the urban aesthetic demand without compromising the building performance. Despite the increase in NIR reflective pigments invest...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-05-01
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| Series: | Infrastructures |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2412-3811/6/6/79 |
| _version_ | 1797532662679732224 |
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| author | Nuno M. M. Ramos Joana Maia Andrea R. Souza Ricardo M. S. F. Almeida Luís Silva |
| author_facet | Nuno M. M. Ramos Joana Maia Andrea R. Souza Ricardo M. S. F. Almeida Luís Silva |
| author_sort | Nuno M. M. Ramos |
| collection | DOAJ |
| description | Near-infrared (NIR) reflective materials are being developed for mitigating building cooling needs. Their use contributes to broadening the range of colours, responding to the urban aesthetic demand without compromising the building performance. Despite the increase in NIR reflective pigments investigation, there is still a knowledge gap in their applicability, impact, and durability in multilayer finishing coatings of External Thermal Insulation Composite Systems (ETICS). Hence, the main goal of this work consists of evaluating the impact of incorporating NIR reflective pigments (NRP) in the solar reflectance of the surface layer of ETICS, without affecting the colour perception, as well as their influence on the colour durability and surface temperature. As such, colour, solar reflectance, and surface temperature were monitored for 2 years in dark-coloured specimens of ETICS, with and without NRP and a primer layer. It was confirmed that the main contribution of NRP is the increase of solar reflectance and, consequently, the decrease in surface temperature, especially for high exterior temperatures (around 30 °C). Moreover, these pigments highly increase the NIR reflectance without affecting the visible colour. In addition, they contribute to maintaining the colour characteristics. The application of primer increased the surface temperature, especially for higher exterior temperatures. However, it contributes to a lower colour difference and solar reflectance variation, which is an important achievement for durability purposes. |
| first_indexed | 2024-03-10T11:03:29Z |
| format | Article |
| id | doaj.art-6fa1688567cd444d8693677c554957c9 |
| institution | Directory Open Access Journal |
| issn | 2412-3811 |
| language | English |
| last_indexed | 2024-03-10T11:03:29Z |
| publishDate | 2021-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Infrastructures |
| spelling | doaj.art-6fa1688567cd444d8693677c554957c92023-11-21T21:20:28ZengMDPI AGInfrastructures2412-38112021-05-01667910.3390/infrastructures6060079Impact of Incorporating NIR Reflective Pigments in Finishing Coatings of ETICSNuno M. M. Ramos0Joana Maia1Andrea R. Souza2Ricardo M. S. F. Almeida3Luís Silva4CONSTRUCT—LFC, Faculty of Engineering, University of Porto, 4200-465 Porto, PortugalCONSTRUCT—LFC, Faculty of Engineering, University of Porto, 4200-465 Porto, PortugalCONSTRUCT—LFC, Faculty of Engineering, University of Porto, 4200-465 Porto, PortugalDepartment of Civil Engineering, Polytechnic Institute of Viseu, 3504-510 Viseu, PortugalSaint-Gobain Weber, Zona Industrial da Taboeira-Esgueira, 3800-055 Aveiro, PortugalNear-infrared (NIR) reflective materials are being developed for mitigating building cooling needs. Their use contributes to broadening the range of colours, responding to the urban aesthetic demand without compromising the building performance. Despite the increase in NIR reflective pigments investigation, there is still a knowledge gap in their applicability, impact, and durability in multilayer finishing coatings of External Thermal Insulation Composite Systems (ETICS). Hence, the main goal of this work consists of evaluating the impact of incorporating NIR reflective pigments (NRP) in the solar reflectance of the surface layer of ETICS, without affecting the colour perception, as well as their influence on the colour durability and surface temperature. As such, colour, solar reflectance, and surface temperature were monitored for 2 years in dark-coloured specimens of ETICS, with and without NRP and a primer layer. It was confirmed that the main contribution of NRP is the increase of solar reflectance and, consequently, the decrease in surface temperature, especially for high exterior temperatures (around 30 °C). Moreover, these pigments highly increase the NIR reflectance without affecting the visible colour. In addition, they contribute to maintaining the colour characteristics. The application of primer increased the surface temperature, especially for higher exterior temperatures. However, it contributes to a lower colour difference and solar reflectance variation, which is an important achievement for durability purposes.https://www.mdpi.com/2412-3811/6/6/79solar reflectancesurface temperaturecolourETICSNIR reflective pigments |
| spellingShingle | Nuno M. M. Ramos Joana Maia Andrea R. Souza Ricardo M. S. F. Almeida Luís Silva Impact of Incorporating NIR Reflective Pigments in Finishing Coatings of ETICS Infrastructures solar reflectance surface temperature colour ETICS NIR reflective pigments |
| title | Impact of Incorporating NIR Reflective Pigments in Finishing Coatings of ETICS |
| title_full | Impact of Incorporating NIR Reflective Pigments in Finishing Coatings of ETICS |
| title_fullStr | Impact of Incorporating NIR Reflective Pigments in Finishing Coatings of ETICS |
| title_full_unstemmed | Impact of Incorporating NIR Reflective Pigments in Finishing Coatings of ETICS |
| title_short | Impact of Incorporating NIR Reflective Pigments in Finishing Coatings of ETICS |
| title_sort | impact of incorporating nir reflective pigments in finishing coatings of etics |
| topic | solar reflectance surface temperature colour ETICS NIR reflective pigments |
| url | https://www.mdpi.com/2412-3811/6/6/79 |
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