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The fire retardance and endurance of functionally graded wood in the case of the heat‐compressed treatment method
Author(s) -
Getto H.,
Ishihara S.
Publication year - 1998
Publication title -
fire and materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.482
H-Index - 58
eISSN - 1099-1018
pISSN - 0308-0501
DOI - 10.1002/(sici)1099-1018(199809/10)22:5<199::aid-fam653>3.0.co;2-j
Subject(s) - limiting , specific gravity , limiting oxygen index , phosphoric acid , nitrogen , composite material , materials science , pulp and paper industry , chemistry , combustion , engineering , metallurgy , mechanical engineering , organic chemistry , char
The behaviour of wood with the heat‐compressed treatment method was evaluated. Fire retardance and endurance of wood treated with basic nitrogen compounds and phosphoric acid were much improved by the compressed method using a hot press. In this way, the concentration of chemical contents and the density of wood were raised at the surface of the treated wood and it increased the specific gravity of the treated wood as a whole. It was recognized that the increase of specific gravity improved fire retardance and endurance, and fire endurance of wood was indicated by the equation of addition of chemicals and specific gravity. It is more effective to increase the specific gravity of wood at the surface to improve fire endurance. Wood treated with chemicals showed a high limiting oxygen index in proportion to the increase in the addition of chemicals regardless of the treatment method, and high fire endurance was not always accompanied by a high limiting oxygen index. © 1998 John Wiley & Sons, Ltd.