Study of physical and mechanical properties of oriented board depending on moisture content
2011
Kask, R., Estonian Univ. of Life Sciences, Tartu (Estonia). Inst. of Forestry and Rural Engineering | Lille, H., Estonian Univ. of Life Sciences, Tartu (Estonia). Inst. of Forestry and Rural Engineering | Siim, K., Estonian Univ. of Life Sciences, Tartu (Estonia). Inst. of Forestry and Rural Engineering | Paabo, P., Estonian Univ. of Life Sciences, Tartu (Estonia). Inst. of Forestry and Rural Engineering | Sillaste, K., Estonian Univ. of Life Sciences, Tartu (Estonia). Inst. of Forestry and Rural Engineering
The goal of this study was to analyze the moisture content of the oriented strand board (Durélis/Populair and OSB 3) representing moisture resistant boards for load-bearing applications in humid conditions. The studied properties are modulus of rupture (MOR), modulus of elasticity (MOE), static hardness, thickness swelling and absorption of water. The moisture content of specimens was altered by soaking during different periods of time (6h, 12h, 18h, 24h, 36h) while one series (24h) was dried out in a climate chamber. An analytical equation was used for approximation of the change of the physical and mechanical properties of the specimens depending on their moisture content. The sensitivity of the measured data has been studied and the expanded uncertainties of the computed mean values are presented. The study reveals that although the boards are moisture resistant, there are some significant differences from the physical and mechanical properties set by the standard, which are caused by their different manufacturing technologies and differences in their structure.
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