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Reticulitermes lucifugus Rossi, and its damages in Turkey
1982 - IRG/WP 1152
The moist-wood termite, Reticulitermes lucifugus Rossi, is generally observed on the wood material which has a direct contact with the soil as trunks and fence stakes. It was reported to be found in some provinces in Turkey. The termite has been seen in these areas so far at the endemic level, but any considerable damage or epidemy has not yet been reported. Considerable damages were observed on the fibreboard stored under unsuitable conditions at Artvin fibreboard factory during the depression period of building sector in the years of 1980-1981.
O A Sekendiz


Vapour boron treatment of wood based panels: Further studies on mechanical properties
1993 - IRG/WP 93-30028
Samples of medium density fibreboard, chipboard and oriented strandboard were treated to two retentions of boric acid by vapour phase methods. The results of short term mechanical tests on this material were discussed by Hashim et al. (1992). The present paper discusses results with long term studies on bending and impact resistance with panel types. Long term tests of impact resistance showed no greater reduction in toughness of treated panels compared to control panels over the test period of one year
R Hashim, R J Murphy, D J Dickinson, J Dinwoodie


Biodegradation of acetylated southern pine and aspen composition boards
1994 - IRG/WP 94-40020
This objective of this study was to investigate the influence of the acetylation treated wood fiber, Phenol-formaldehyde resin content level, two wood fiber species, three fungi species on the dimensional stability and decay resistence of high density composition boards. A standard ASTM method was used to evaluate weight loss and thickness change. The linear shrinkage and expansion of each species were also determined. All specimens were exposed to decay chambers for 16 weeks. Test results indicated that most of the main factors significantly influence the thickness and length changes and the decay resistance of the high density composition boards.
P Chow, T Harp, R Meimban, J A Youngquist, R M Powell


Preservation of wood-based panels against fungi and insects and and testing its efficiency
1976 - IRG/WP 270
Wood-based panel products which are made of susceptible wood species may be destroyed by fungi under wet conditions and by termites. The glues do not provide sufficient protection unless very high concentrations are applied. Particle boards and fibre boards are not susceptible to beetle infestation, although some species may attack plywood. Various types of preservatives provide sufficient protection of panel products. These are boron, fluoride, copper, and chromium compounds in the category of water-soluble salts and various organic compounds, including contact insecticides, in the category of nonwater-soluble substances. Their application is influenced by their compatibility with the glue and by the different methods of treatment. For the production of fibreboards oil-borne preservatives are preferred. With regard to particle boards and plywood it is recommended to apply the required preservative loadings prior to the pressing operation, to mix them with the glue or to impregnate the particles or plies and with regard to fibreboards to spray the pressed and cooled down panels with the preservative. The fungus cellar test is the most suitable method for testing the efficiency of a chemical treatment of panel products against fungal attack. With regard to beetle species European standard methods of test are available. There are also laboratory and field methods for evaluating the resistance against termites. Treatment standards are controlled by chemical methods of analysis.
G Becker, M Gersonde


A field test on susceptibility of wood-based board materials to moulds
1989 - IRG/WP 3545
A field test on susceptibility of wood-based board materials to mould growth was carried out under practical, but severe, service-conditions. A total of 19 commercially available composite boards were investigated. It was found that all board materials tested were not completely immune to mould attack. Test results revealed that among the three main categories of wood-based boards involved, particleboards were the most susceptible, followed by fiberboards. Plywoods were less susceptible to mould growth. The test also showed that among various types of board materials, the asphalted fiberboard, the particleboards made from birch wood shavings, and wood-industry residues were the most vulnerable to mould growth.
Qiao Wang, B Henningsson