engleski

Influence of Consolidation Treatment with Paraloid B72 on Sorption Properties of Decayed Wood

This paper deals with influence of consolidation treatment on sorption properties of wood. Purpose of testing the influence of consolidation treatment on sorption properties of wood is attempt to quantify possible changes of sorption properties of wood after a consolidation treatment compared to untreated wood. Spruce wood was used for this research. Old and degraded wood react different on climate changes and on consolidation treatment, therefore four groups of specimens were prepared. Specimens of health wood and of degraded wood were prepared. Half number of the specimens of each group was impregnated with 15 % acetone solution of Paraloid B72, and afterwards slowly dried. All specimens were conditioned at standard climate and weighted. Specimens were exposed to changes in relative humidity. During testing, moisture content of all specimens was measured by electro-resistance and gravimetrically. Difference in moisture content between treated and untreated specimens was smaller than expected. Results showed that trend of changes in moisture content were equal for bout treated and untreated wood. Interdependence between relative humidity and moisture content of untreated and of treated wood showed similarities with expected shape of sorption hysteresis. Consolidation treatment neither significantly increased hydrophobization of wood, nor significant influenced the hygroscopicity of wood.

consolidant ; hygroscopicity of wood ; moisture content ; relative humidity ; impregnation ; wood hydrophobization

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