DIGITALNA ARHIVA ŠUMARSKOG LISTA
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ŠUMARSKI LIST 11-12/1997 str. 55 <-- 55 --> PDF |
H. Turkulin. V. Jirouš-Rajković, I. Grbac:POVRŠINSKA POSTOJANOST DRVNIH GRAĐEVNIH KONSTRUKCIJA Šumarski listbr. 11-12, CXXI (1997). 617-629 Wengert , E.M. (1966): Parameters for predicting Williams , R.S.; Feist , W.C. (1993): Durability of maximum surface temperatures of wood in extepaint or solid-color stain applied to preweathered rior exposures. Research Paper FPL 62. Mawood. Forest Prod. J. 42(1): 8-14. dison: US Forest Service, Forest Products LaboWilliams , R.S.; Feist , W.C. (1994): Effect of preratory, pp. 15. weathering, surface roughness and wood species Williams , R.S. (1988): Effect of dilute acid on the on the performance of paint and stains. Journal of accelerated weathering of wood. JAPCA 38: Coatings Technology 66(1), No 828: 109-121. 148-151. Williams, R.S.; Plantinga, P.L.; Feist, W.C. Williams , R.S. (1990): Effects of acidic deposition (1990): Photodegradation of wood affects paint on painted wood. In: Acidic deposition: State of adhesion. Forest. Prod. J. 40(1): 45 - 49. science and technology. Effects of acidic depoWiesner , J. (1864): Über Zerstörung der Hölzer an sition on materials. Vol.3. Report 19. National der Atmosphäre. Sitzungsber. Akad. Wiss. Wien acid precipitation assessment program. 1990: 49:61-94. 19-165. 19-202. SUMMARY: Wood in exterior structures undergoes certain chemical and physical changes which cause the slow degradation of wood surface commonly known as weathering. The disintegration is caused by the combined action of ultra-violet light from the sun, moisture and oxygen from the air, and additional effects of wind, rain and other precipitation. Wood changes colour, roughens and erodes with time. Possible biological attack excluded, weathering is the most serious risk to wood for building purposes. The encouraging of the use of wood as the main material for the joinery and other building components depends mainly on the exploitation of the results of research on the improvement of the wood durability, its modifications and its correct and efficient finishing in order to reduce the maintenance costs and extend the service life of protective and decorative coatings. The paper analyses the process of wood weathering and presents the literature survey on the recent research results in the field of the durability of wood building components. |