Your search resulted in 1256 documents. Displaying 25 entries per page.
Performance of dip and pressure treated wood in termite ground proximity exposures in Hilo, HI, and Colombia
2008 - IRG/WP 08-30491
A number of preservative systems were evaluated for their ability to control termite attack when applied as both dip and pressure treatments. With dip treatments, better performance was observed with southern pine than spruce-pine-fir using the same solution strength treatment, probably as a result of the about 50% greater uptake with southern pine and associated deeper preservative penetration. B...
P Walcheski, A Zahora
High Temperature Treated Wood
2008 - IRG/WP 08-40429
High temperature can modify internal structure and physic-chemical properties of wood by a controlled pyrolysis process. Such treatment, among other changes in properties, modifies the wood color in a way that resembles exotic species, increasing its market value. The main objective of this work is to determine the changes in wood properties caused by the effect of temperature and time, in order t...
C C Borges, A L Barbosa, R Faber de Campos, S T Targas
Effect of a biological treatment on below ground decay of Douglas-fir pole sections
2008 - IRG/WP 08-40433
The use of exogenous sugars to accelerate microbial growth and eventually limit available oxygen in soil surrounding wood in soil contact was investigated on untreated Douglas-fir poles exposed over a 3 year period in Western Oregon. Isolation frequencies differed markedly between treated and untreated poles and the treatment did appear to shift the frequency of some basidiomycetes. The treatment ...
C Freitag and J J Morrell
Opportunities and Needs with Treatments for the Protection of Plantation Species
2008 - IRG/WP 08-40438
The future of the wood treating industry lies increasingly on the treatment of wood derived from plantation forests. Plantation softwoods and hardwoods both provide significant opportunity for utilization coupled with protection technologies, but development programs will require much more focus and funding than is currently available. Manufacturing and treating of products from plantation fores...
A F Preston
Effect of different ASAs (alkenyl succinic anhydrides) on the treatment of biological protection of wood in use class 4
2008 - IRG/WP 08-40440
The alkenyl suscinic anhydrides (ASAs) used in this work are adducts resulting from the maleinization reaction of fatty acid alkyl esters. Various products with different alkyl groups were synthesized from rapeseed (Brassica napus) oil esters, rich in oleic acid. The liquids obtained showed a viscosity similar to that of vegetable oils and a brown color. When applied into wood, a thermal treatment...
C Vaca-Garcia, O Pignolet
Natural Durability of Some Heartwood from European and Tropical African Trees against Marine Organisms
2009 - IRG/WP 09-10682
This study aims to investigate the natural marine durability of some tropical and domestic wood species in marine environment. A total of 33 tree species, comprising 18 European and 15 tropical originated trees were exposed to marine conditions in 6 meters depth for a period of 14 months at east and west Black sea, Mediterranean, Aegean, and Marmara coasts. The results indicated that wood species...
S Sen, H Sivrikaya, M Yalçın
Categorization of 300 timber, bamboo and cane grown in Bangladesh based on their families, origins, growths, physical and mechanical properties
2009 - IRG/WP 09-10684
In this study the 300 timber, bamboo and cane plants grown in Bangladesh have been classified into various categories based on their taxonomic families, origin of species, rate of growth, color of wood, texture of wood, shrinkage of wood, equilibrium moisture content (EMC) of wood, flammability of wood, cutting and sawing properties of timber, finishing and polishing qualities of wood, machining p...
A K Lahiry
Evaluation of the natural durability of reed (Phragmites australis) originating in the Fertö region (Hungary) against wood decay organisms as material for use in a sustainable motorway noise barrier
2009 - IRG/WP 09-10685
This work presents the research carried out to determine the natural durability of reed from the Fertö region of Hungary against wood decay organisms. The final objective of this study is to obtain sufficient relevant data in order that the reed may be used as a constituent element in a viable and sustainable motorway noise barrier, which has been developed within the European research project, k...
M T Troya, F Rubio, M J Prieto, D Lorenzo, J L Fernández-Cabo, R Schöftner
Study on the natural durability of Eucalyptus grandis wood from Argentina
2009 - IRG/WP 09-10689
In Argentina eucalypts are in second place of importance in planted area, after pines. Due to its high growth rates (from 35 to 55 m3/ha/yr), Eucalyptus grandis is the most important among the eucalypts planted in Argentina. Moreover, E. grandis is one of the species with the greatest potential in the country, because of its diversity of uses for high end and added value solid products. Due to the...
D Lorenzo, M T Troya, J C Piter, M Sánchez, C Baso
Study on the natural durability of Eucalyptus globulus wood from Spain
2009 - IRG/WP 09-10690
The wood of Eucalyptus globulus is recommended in some countries, such as Australia, due to its high durability, in risk situations where attack by organisms is likely to occur. In Galicia this species has been used for many decades for timber structures and other uses, which are still used. However, European Standard EN 350-2 places Eucalyptus globulus in the worst category of natural durability,...
D Lorenzo, M T Troya, M Touza, C Baso
Termite resistance of pure and mixed heartwood-sapwood Cypress (Cupressus sempervirens L.) plywoods
2009 - IRG/WP 09-10693
The main objective of this research was to evaluate the ability of different plywoods made of durable heartwood and/or non-durable sapwood to resist termite damage. The well-known durable cypress (Cupressus sempervirens) was chosen for this study. The natural durability of cypress solid wood, divided into sapwood and heartwood, as well as the durability of 17 different laboratory manufactured plyw...
F Faraji, M-F Thévenon, B Thibaut
Antinomic natural self-protection mechanism in long-lasting woods: a case study with three tropical species from French Guiana
2009 - IRG/WP 09-10696
We demonstrate in this work through 3 examples that Amazonian trees may specialize long-lasting woods by means of at least to different approaches. Wallaba impregnates its wood with large amounts of weakly antifungal compounds acting in synergy, while tatajuba and louro vermelho woods are naturally impregnated with antifungal agents. Comparison of biological activities in vitro and concentrations ...
A Rodrigues, M Royer, N Amusant, J Beauchêne, G Herbette, V Eparvier, A Thibaut, L Salmen Espíndola, B Thibaut, D Stien
Wood characterization of Tetraclinas articulata and evaluation of its resistance against lignilolytic fungi
2009 - IRG/WP 09-10697
Coniferous trees of the Tetraclinis articulata known under the Common name thuja from Berberie, is an endemic species from North Africa. The solid wood is much appreciated for its natural beauty and homogeneity and its quality for marquetry and furniture. The aim is to improve Tetraclinis articulate uses. At present, its wood is widely underestimated and sub-used compared to its announced qualitie...
F El Bouhtoury-Charrier, A Hakam, A Famiri, M Ziani, B Charrier
Natural Durability Variations of Malaysian Timbers from Sarawak after 26 Years Exposure by Stake Test
2009 - IRG/WP 09-10704
An extensive graveyard stake test site was established in 1977 in Sibu, Sarawak, Malaysia, to evaluate the in-ground durability of 132 Sarawak wood species, mainly hardwoods. Test samples were planted at 100 x 50 cm spacing. Authenticated wood specimens from 3 trees of each of 132 species were processed into 20 replicated outer heartwood (or else undifferentiated heartwood) stakes of 19 x 19 x 457...
A H H Wong, Ling Wang Choon
Effects of cold treatment on wood destroying fungi important in cultural heritage
2009 - IRG/WP 09-10706
The dry rot fungus Serpula lacrymans (Wulfen:Fr.) Schroeter is notorious in building environments for its vitality, destructive potential, and the huge costs associated with remediation of damage caused to wood of cultural heritage. Due to the potentially adverse of effects of chemical treatment methods such as have been attempted in the past, more benign physical methods of treatment, e.g. heat t...
M Lüdicke, W Unger, G Binker
Durability and fungal colonisation patterns in wood samples after six years in soil contact evaluated with qPCR, microscopy, TGA, chitin- and ergosterol assays
2009 - IRG/WP 09-20402
There is a need to establish new objective and sensitive methods for early detection and quantification of decay fungi in wood materials. Molecular methods have proven to be a useful tool within wood protection issues, however, this field is still poorly explored and so far relatively few have used these methods within the field of wood deterioration. Among the techniques used in the indirect quan...
A Pilgård, G Alfredsen, I Børja, C Björdal
Effect of Preservative Treatment on Fungal Colonization of Teak, Redwood, and Western Red Cedar
2009 - IRG/WP 09-20404
Fungal flora present in preservative treated samples or non-treated samples from sapwood and heartwood of teak, western red cedar, redwood, and southern yellow pine was assessed after 6 to 18 months of exposure near Hilo, Hawaii. The objectives were to compare fungal composition and diversity between treated and non-treated samples, and to examine the use of molecular techniques for assessing fung...
Y Cabrera, C Freitag, J J Morrell
Wart Morphology can Distinguish White Cypress Pine from the Less Durable Species, Black Cypress Pine
2009 - IRG/WP 09-20406
White cypress pine (Callitris glaucophylla) wood is durable enough to be used outdoors, but occasionally there are reports of its premature failure in ground contact, which may be due to its substitution by the less durable species, black cypress pine (C. endlicheri). It has been difficult to prove this, however, because the woods of both species are very similar in structure and cannot be separat...
R Heady, R Cunningham, P Evans
Ensure Durable Wood-Frame Construction under the Climate and Biological Hazards in Shanghai
2009 - IRG/WP 09-20413
This paper provides technical background for developing durability-related provisions for the Shanghai wood-frame construction code. It summarizes the related climate, decay and termite hazards in this area as well as traditional durability solutions used for wood and wood hybrid constructions in China. The overall durability principles or philosophy used throughout this durability chapter are to ...
Jieying Wang, Chun Ni, Jiahua Zhang
Fungal decay resistance and durability of wood products made from borax-impregnated wood and bonded with corn starch and tannin adhesive
2009 - IRG/WP 09-30494
At present, the production of wood composites mainly relies on the petrochemical-based and formaldehyde-based adhesives such as phenol formaldehyde (PF) resins and urea formaldehyde (UF) resins, which are non-renewable and therefore ultimately limited in supply. This paper concerns the decay resistance of wood products bonded with a new, environment-friendly adhesive derived from abundant and rene...
A Moubarik, A Pizzi, A Allal, F Charrier, B Charrier
Laboratory and above ground exposure efficacy of silicon-boron treatments
2009 - IRG/WP 09-30510
The study deals with silicon compounds, namely tetraethoxysilane (TEOS), phenyltriethoxysilane (PhTES) and methyltriethoxysilane (MTES) at concentrations of 23, 16 and 10% in combination with 1.2-1.5% boric acid. The aim with the study was to combine the chemical approach with the necessary biological tests of the impregnated wood. The tested silicon-boron combinations ensured mass loss less than ...
N Terziev, D Panov, A Temiz, S Palanti, E Feci, G Daniel
Effect of extractives on durability of Prosopis juliflora heartwood
2009 - IRG/WP 09-30518
The heartwood of Prosopis juliflora is resistant to fungal attack caused by different brown and white rot fungi. This durability due to the presence of high amounts of extractives decreases after extraction of these latter ones with different solvents. Heartwood extractives were effective in inhibiting the growth of the fungi. Depending on the concentration used, development of the fungal mycelium...
P Sirmah, K Iaych, B Poaty, S Dumarçay, P Gérardin
Effectiveness of a superficial treatment of bifenthrin to protect softwood framing from damage by subterranean and drywood termites in Indonesia
2009 - IRG/WP 09-40443
Various experimental testing procedures were undertaken in Indonesia to determine the effectiveness of a superficial (envelope) treatment of bifenthrin to protect softwood framing from damage by two species of subterranean termite (Macrotermes gilvus and Coptotermes curvignathus) and one species of drywood termite (Cryptotermes cynocephalus). Lengths of framing (Pinus radiata sapwood) were commerc...
P Sukartana, J W Creffield, A Ismanto, N E Lelana
Differential response of wood to dry air thermal treatment (DATT) and soy oil thermal treatment (SOTT)
2009 - IRG/WP 09-40446
Thermal treatment is an alternative to chemical modification method which has been used to some extent in improving timber quality. In order to get the maximum benefits possible without compromising the various end-use quality requirements of timber, several possibilities have been and are still being investigated in relation to this technique. Clear wood samples (19 x 19 x 150mm) of kiln-dried re...
L Awoyemi
Effects of concentration and temperature of CCA and CCB on wood strength of Turkish fir (Abies bornmulleriana Mattf.)
2009 - IRG/WP 09-40450
The purpose of this study was to present evidence for the effects of concentration and temperature of solutions of water-borne preservatives (chromated copper arsenate, CCA and chromated copper boron, CCB) on the static bending properties (modulus of elasticity, MOE and modulus of rupture, MOR) of Turkish fir (Abies bornmulleriana Mattf.). Wood samples were mechanically tested after a mild full ce...
I Usta, M Hale