By: OWOYEMI J. M.;
Abstract:
The effect of preservative viscosity on fluid absorption by Gmelina arborea wood was investigated using Copper Chrome Arsenate (CCA), Creosote Oil (CREO), and Cashew-Nut Shell Liquid (CNSL) preservatives. Viscosity test was carried out on these preservatives using viscometer. Hot and cold dipping methods of application were used for the preservative treatments on Gmelina arborea wood. The result revealed that hot treatment method lowered preservative viscosity and improved its uptake by the wood with percentage absorption of. 9.65 ± 4.32 compared with cold treatment; 7.70 ± 2. 79. This method statistically showed significant difference between hot and cold treatments. Also, there was significant difference between CCA and the other two preservatives in the absorption capacity of Gmelina arborea wood. The highest percentage absorption of 13.94 ± 3.7 was recorded for CCA, followed by CREO with 9.84 ± 4.32, while CNSL has the least absorption of 5.18 ± 1.3 for hot treatment. The result of viscosity test for the preservatives when compared with absorption showed that absorption is greatly influenced by the state of preservatives during application.
Keywords: Gmelina arborea, Copper Chrome Arsenate, Creosote Oil, Cashew Nut Shell Liquid, thermal proccess
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