Degradation Models for Ten-year Weathering of Architectural Coatings

Autor:	Norimoto Kashino, Takashi Tomiita, Nobuhito Hirata
Rok vydání:	2005
Předmět:	Cultural Studies Delta Lightness Arts and Humanities (miscellaneous) Architecture Environmental engineering Environmental science Degradation (geology) Soil science Weathering Building and Construction Civil and Structural Engineering
Zdroj:	Journal of Asian Architecture and Building Engineering. 4:455-460
ISSN:	1347-2852 1346-7581
DOI:	10.3130/jaabe.4.455
Popis:	An outdoor exposure-testing program for architectural coatings was conducted in Tsukuba from 1987-1997.Observed gross retention of samples set horizontally, 5-deg. south and 30-deg. south was on average severer than that of 90-deg. south, while the conditions of 90-deg. north are more moderate. The lightness of white samples decreased during the early part of the first year and was almost constant, thereafter. Delta L* of 90-deg. south and 90-deg. north is smaller than that of horizontal, 5-deg. south and 30-deg. south.Koike and Tanaka′s equation is a more appropriate analytical method regarding the weatherability of exposed paints and coatings than the conventional system, which uses solar UV.
Databáze:	OpenAIRE
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