1. bookVolumen 45 (2021): Edición 340 (August 2021)
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Formato
Revista
eISSN
2256-0939
Primera edición
30 Aug 2012
Calendario de la edición
2 veces al año
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access type Acceso abierto

The Efficiency of Different Wood Coatings against Water Surface Absorption

Publicado en línea: 11 Aug 2021
Volumen & Edición: Volumen 45 (2021) - Edición 340 (August 2021)
Páginas: 28 - 37
Recibido: 26 Jan 2021
Aceptado: 21 Jun 2021
Detalles de la revista
License
Formato
Revista
eISSN
2256-0939
Primera edición
30 Aug 2012
Calendario de la edición
2 veces al año
Idiomas
Inglés
Abstract

In the market of the Latvia different wood surface coating materials suitable for use in outdoor conditions are offered, but available information on the efficiency of these against direct water exposure is insufficient. For structural timber building elements, such as glued laminated timber (GLT), the surface coating should be applied taking into account technological, visual or colour changes (ISO 7724:1984) and – last, but not least – economic aspects are considered. Wood surfaces coated with coating materials, such as varnishes, paints, etc. can stabilize some properties such as movement of moisture content, dimensional changes and attack by microorganisms and fungi. The changes in the moisture content of timber may influence such important parameters as mechanical properties and the total life time of the structural timber elements. A study has been conducted with the aim of assessing the efficiency of coating materials used for wood protection against water absorption. In this study, six different commercial coating products used for the treatment of spruce (Picea Abies L. Karst.) and pine (Pinus Sylvestris L.) samples were tested. The efficiency of different coating substances was assessed using two modified test methods according to the standards EN 382-2 (1994) and EN 927-5 (2006), determining the surface water absorption after immersion in water for 24 h and the dynamics of water absorption of the glued laminated timber for 696 h kept in water. As a result of the study, it has been ascertained that organic solvent-based commercial coating products are more efficient against short-term and long-term wood water absorption compared to oil-based coating materials.

Keywords

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