Abstract
This study was performed to determine the effects of varnishing after impregnation with boron compounds on the combustion properties of Scotch pine. For this purpose, test samples prepared from Scotch pine (Pinus sylvestris Lipsky) wood were impregnated according to ASTM-D 1413-99 standard with boric acid (Ba) and borax (Bx) by vacuum technique. After impregnation, surfaces were coated by cellulosic (Cv), synthetic (Sn), polyurathane (Pu), waterborne (Wb), acrylic (Ac) and acid hardening (Ah) varnishes in accordance with ASTM D-3023 standard and then, combustion temperature was determined. According to material and process type, combustion temperature was the highest in Bx and Wb in flame source combustion (FSC), the lowest in Ba and Ac without flame source combustion (WFSC). According to combustion type, impregnation material and varnish type, combustion temperature was the highest in FSC, borax and cellulosic varnish combination and the lowest in WFSC, boric acid and acid hardening varnish combination. In conclusion, impregnation materials decrease while varnishes increase the combustion temperature of Scotch pine wood.
Highlights
Wood is an organic, hygroscopic and anisotropic material
This study aims to determine and discuss the effects of varnish and impregnation processes on combustion properties of Scotch pine with various varnishes after impregnation with boric acid (Ba) and borax (Bx)
The highest result for retention proportion of Scotch pine was observed in boric acid while the lowest result was found for borax
Summary
Hygroscopic and anisotropic material. Properties of wood for thermal, acoustic, electrical, mechanical, aesthetic and constructive aspects are very suitable to use and possible to build a comfortableHow to cite this paper: Atar, M., Döngel, N. and Çinar, H. (2015) An Analysis of Varnish and Impregnation Processes for Combustion Temperature of Scotch Pine. Wood shows low resistance against fire and high temperatures according to the study of Bednarek and Kaliszuk [1]. For the crucial importance of fire security, all types of professionals such as architects, interior designers, and furniture manufacturers give a great importance for increasing the resistance of wood material against fire. A number of authors, e.g. Bednarek and Kaliszuk [1], Goldstein [2], Levan and Widany [3], Keskin et al [4] and Yapici et al [5] studied the theories of the combustion of wood and its control. In spite of making efforts to increase the resistance against fire and high temperatures, wood materials wholly incombustible is almost impossible. Combustion properties are mainly improved by processing wood with some chemical materials to increase the fire resistance
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