The demand of the construction industry for wood-based materials is very high. A special place in the group of these products is occupied by those that are intended for use in humid conditions, or even load transferring in these conditions. OSB and MFP boards occupy top positions on the market of these materials. Numerous studies in the field of dimensional stability of OSB boards have already been carried out at the Department of Wood- Based Materials at the UP in Poznań (Mirsk et al. 2017, Mirski et al. 2015, Mirsk et al. 2013, Mirski and Dziurka 2013, Mirski 2010 and 2009). Studies on MFP boards involved more changes in mechanical properties in conditions of variable humidity than their dimensional changes (Kociszewski et al. 2013). This issue is important because it first informs users what size expansion joints should use, and secondly determines the stability of the entire structure. Because of there is no information about the dimensional stability of MFP boards, and in addition this type of boards are characterized by high density, it was decided to assess the dimensional stability not only of MPF boards, but also boards manufactured in laboratory conditions with a much lower density, and these results refer to the properties of OSB boards.
Keywords: dimensional stability, wood-based materials, humidity conditions
Authors
Radosław Mirski
Poznań University of Life Sciences, Poznan, Poland
Dorota Dziurka
Adam Derkowski
Joanna Siuda
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