DURABILITY OF COOL AND CONVENTIONAL COLORED COATINGS AFTER SIX MONTHS EXPOSURE AT DIFFERENT ENVIRONMENTS

Author(s): Loh, K., Sato, N. M. N. and Liborio, I. M. S.
Paper category: Conference
Book title: XIII International Conference on Durability of Building Materials and Components - XIII DBMC
Editor(s): Marco Quattrone, Vanderley M. John
Print ISBN: none
e-ISBN: 978-2-35158-149-0
Publication year: 2015
Pages: 23-29
Total Pages: 7
Language: English

Abstract: This study investigate the solar reflectance of colored acrylic coatings, "cool" and conventional types, after outdoor exposure at urban, marine and rural environments, all of them located in São Paulo State. The “cool” coatings are paints formulated with infrared reflective pigments and present higher solar reflectance than conventional ones.

The solar reflectance of cool coatings was compared to conventional acrylic coatings, bought in the São Paulo market, with similar colors (gray, white, brown and yellow). The exposure was conducted according to ASTM G-7.

The coatings were applied on asbestos-free fiber cement plates; color and solar reflectance were measured in unexposed specimens and after six months of exposure at the 3 sites. The results showed that the cool paints present significantly higher reflectance in the infrared (NIR) than the corresponding conventional colored paints. The study showed that the “cool” coatings after 6 months of natural aging still present higher reflectance than the conventional paints.

Online publication: 2015
Publication Type: full_text
Public price (Euros): 0.00