Zprávy památkové péče 2018, 78(3):260-266 | DOI: 10.56112/zpp.2018.3.10
Testing the aging of facade paints in natural conditions
- Fakulta chemické technologie ČVUT v Praze
Facade paints are an important part of the cladding of most buildings. Differences in their composition, especially the binding system, are the cause of different behaviors during the aging process. This article describes the results of the long-term exposure of commercial representatives of the main types of facade paints (acrylic, silicone, silicate, and lime) to natural aging. After 16 years of natural conditions (rain, wind, solar radiation, etc.) on test surfaces with individual paints, it is clear that `the bonding system of the paint significantly influences the behavior of the paint. Despite the same environmental conditions, differences in the individual painted surfaces appear in the appearance of the paint, its protective function, the degree of fouling, the level of cracking, etc. Lime coatings clearly markedly their thickness during the experiment and reveal the filler grains, while silicate coatings also gradually lose thickness but to a lesser degree. In acrylic paint, a dense network of micro-cracks appears over time which covers through the entire coating, but the thickness of the coating is not significantly altered; the same applies to silicone paints.
Keywords: facade paints, long-term experimental research, silicate paints, lime paints, silicone paints
Published: September 1, 2018 Show citation
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