Your search resulted in 281 documents. Displaying 25 entries per page.
Treatment of refractory timbers
1993 - IRG/WP 93-40001
Worldover crisis of wood is being felt due to the global environmental problems. Wood preservation technology plays a good role in curtailing the demands of wood for replacement by prolonging the service life of the timber and thus indirectly helps in saving the environment. Some species of timbers which could not be treated to the desired level by virtue of their refractory nature by any of the c...
I Dev, S Kumar
Alternative timbers to Iroko (Milicia excelsa) for various end-uses: Ghana’s offer
2004 - IRG/WP 04-10518
There are hundreds of timber species indigenous to Ghana and several exotic species have been
extensively planted. The timber industry in Ghana is very important to the country’s economy. Despite
its small size relative to the world trade in timber products, it has the potential to be a driving force in the development of the Ghanaian economy. The industry is currently going through a period...
S A Amartey, Zeen Huang, A Attah
Aboveground Microbial Decay Test of Biocide Treated and Untreated Wood Exposed to Danish and Humid Tropical Climates
2004 - IRG/WP 04-20306
A co-operative study was initiated to compare the aboveground field decay test of untreated and preservative-treated timbers under Nordic (Danish) and a representative humid tropical (Malaysian) environment according to CEN standard method. Matched specimens of untreated and both preservative-impregnated and surface-treated wood were simultaneously exposed at The Danish Technological Institute (DT...
A H H Wong, N Morsing, K H Henriksen, S Ujang
Methods of culturing Lyctidae
1980 - IRG/WP 1126
Members of the tropical countries in the IRG Sub-Group "Insects in dry wood" requested a paper on the breeding of lyctids. Compared with other wood boring insects, such as cerambycids and anobiids, the breeding of lyctids is not as difficult and time consuming. Nevertheless some basic principles have to be observed in the laboratory to obtain successful cu·ltures. It is the intention of this repo...
H Kühne
Comparative natural resistance of eighty-two timber species to damage by marine borers at Goa (India)
1996 - IRG/WP 96-10139
Natural bioresistance of eighty-two species of Indian timbers to attack by marine wood-borers has been presented based on data collected from test panels exposed in Goa waters (west coast of India) for periods ranging from five to thirteen months. All the timber species, except Artocarpus gomeziana and Pterocarpus santalinus, were completely destroyed within a short period of three to six months. ...
L N Santhakumaran
Role of wood preservation in bioconservation and protection of environment
1997 - IRG/WP 97-50082
In order to meet a revolutionary task of bioconservation and protection of environment through preservation of less important and nondurable timbers from tropical zones, 170 timber species from Bangladesh were screened. Air-dried (12% MC) 170 different species of timbers, full cell pressure impregnated with 5% CCB solution revealed satisfactory treatability of all timbers for long-term indoor uses...
A K Lahiry
Need to develop processing technologies (for value addition) of the species evaluated for their properties and uses
2005 - IRG/WP 05-40307
The demand of timber in India for different industrial as well as domestic applications is ever increasing mostly due to urbanization and industrialization. This demand can only be met either from the imported timber or from the plantation resources outside the reserved and natural forests. There are a number of timber species grown under plantation forestry have their heartwood refractory to any ...
S R Shukla, S K Sharma, Y M Dubey, P Kumar, R V Rao, K S Shashidhar
An appraisal of the vertical distribution of attack of untreated and treated wood by warm water sphaeromatids at some tropical sites - A discussion paper
1986 - IRG/WP 4124
Examples of the vertical distribution of burrows of warm water sphaeromatids relative to tide levels and mud line from sites in India, Papua New Guinea and tropical Australia are discussed in detail. These data show clearly that these animals concentrate their attack of resistant natural wood or resistant treated wood in the tidal zone, particularly around Mean Sea Level. Supportive evidence from ...
J E Barnacle, L J Cookson, C N McEvoy
Properties-enhanced albizzia particleboards by incorporating fungicide and insecticide in the glue
1994 - IRG/WP 94-30060
Preservative-treated particleboards were prepared by using tropical fast-growing albizzia and adding fungicides and insecticides to the adhesive-glue. the physical and biological properties of these boards were evaluated. No significant reduction in bending or internal-bond strength due to incorporation of the chemicals was detected. Treated particleboards effectively resisted attack by Coptoterme...
B Subiyanto, S Yusuf, Y Imamura, S Fushiki, T Saito, T Katuzawa
Study of the degradation caused by micro-organisms in Pinus sp. waterlogged wood
1989 - IRG/WP 1411
So far, the different Centers are trying the restoration and the conservation of wood structures, coming from subaquatic archeological deposits, with interest from the historic - artistic point of view. The main objective of this paper has been the determination of the decay level of Pinus sp. wood coming from a roman ship (approximately 2000 years old), where we have analyzed their physical prope...
M T De Troya, M C Escorial, J Garcia, A Cabanas
Standardization of preservative treated timber species for conductor, insulator and transformer packing of REB
1996 - IRG/WP 96-40071
In order to resolve the post landing failure problem of wooden packing for conductor, insulator, transformer of REB, the names of the suitable timber species from different parts of the world, irrespective of countries of origin have been standardized along with their strength and treatability grades. The CCA treatability of some Pakistani timber species have been presented for example which was t...
A K Lahiry
Preservative treatment of common timbers and bamboos of Bangladesh for rural electrification infrastructure
1998 - IRG/WP 98-40104
Researches revealed new treatment grades, treatment groups, grading groups, natural durability grades, strength groups and a new preservative combination for remedial treatment and sterilization of most common timbers and bamboos of Bangladesh. The obtained findings are applicable for equivalent timber species having equivalent climatic condition. Sapwoods are always perishable and timbers with wh...
A K Lahiry
Relative merits of laboratory and field tests for assessing wood decay resistance
1993 - IRG/WP 93-20009
Laboratory and field trials have long been employed for assessing natural durability of a variety of wood species, but there is a continuing debate concerning the relative merits of approach. While laboratory tests provide carefully controlled conditions for decay, they are often criticized for being too artificial to produce meaningful results. Conversely, field trials often vary widely between t...
T C Scheffer, J J Morrell
Observations on the destruction of fishing craft in India by marine wood-borers with special reference to the West Coast
1981 - IRG/WP 468
The paper highlights the economic importance of the destruction of fishing craft in India by marine wood-destroying agencies. The annual loss involved is to the extent of over 94 million rupees. Thirty-nine spectes and one variety of woodborer have so far been recorded from India, of which Bankia campanellata, Bankia carinata, Bankia rochi, Dicyathifer manni, Lyrodus pedicellatus, Teredo clappi, T...
L N Santhakumaran, J C Jain
Investigations of the treatability of various commercially significant Turkish timbers
1976 - IRG/WP 370 E
Timbers which naturally deteriorate quickly can only be used commercially when their life is increased by the use of chemical treatments. The treatment of the timber can only be planned on a regular basis when the treatability of the wood is known. The purpose of the experiments was therefore to determine to what extent the various types of wood could be sufficiently impregnated. The question of t...
R Ilhan
Tunnelling bacteria
1983 - IRG/WP 1186
The micromorphology of decay in wood caused by a certain group of single-cell bacteria, called tunnelling bacteria (TB), is described. TB are characterised by their tunnelling ability within the secondary cell walls of wood fibres. Pure cultures of TB have not yet been obtained although the typical decay patterns can be reproduced using mixed bacterial cultures. Some indications of lignin degradin...
T Nilsson, G F Daniel
Evaluation of teak sawdayst Tectona grandis L Fil as a potential source to obtain a natural wood preservative in Colombia
2004 - IRG/WP 04-30356
Plantation Teak (Tectona grandis L. Fil) has been tested as a possible source of natural wood preservatives due to the known excellent durability of old-growth teak wood. Field tests (ground proximity termite and above ground simulated decking exposures) were established in Colombia in April 2003 at two different test sites with different climates (Tropical Dry and Rain forest). Teak heartwood ex...
A Castillo, Y Cabrera, A F Preston, R Morris
Adequate preservative treatment of kiln dried Eucalyptus camaldulensis and Acacia mangium for tropical and subtropical wood poles
1996 - IRG/WP 96-40075
The Eucalyptus camaldulensis and Acacia mangium round timbers kiln-dried at EMC and full cell pressure treated with CCA-C ensured requisite penetration and adequate dry retention (30 kg/m³ or 4% w/w). The sufficient inherent strength, seasoning property, treatability of sapwood and heartwood equivalent to 44% of radius, natural durability of heartwood, and field investigation on service performan...
A K Lahiry
An observation of seasoning, preservative treatment and storing of CCA treated 30 bangladeshi hardwood species for crossarms
1995 - IRG/WP 95-40058
Observed kiln seasoning, preservative pressure treatment and storing of CCA treated 30 Bangladeshi hardwood species for crossarms. It revealed that it was very difficult to kiln season and preservative pressure treatment of thirty species together in a single charge and found that when species of different specific gravity kiln season together there occur some objectionable seasoning degrades, and...
G N M Ilias, M D Rokib-ul-Hafiz
Efficacy of fumigants in the eradication of decay fungi implanted in southern pine timbers
1986 - IRG/WP 3365
Southern pine timbers (15.2 cm x 15.2 cm x 4.26 m) were fumigated at midlength to evaluate the effectiveness of the fumigants chloropicrin, Vapam, Diazomet, Busan 40, Vanicide 51, Vanicide TH, sodium bisulfite, and ethanolamine in eradication of decay fungi. The fumigants were introduced into 2.54 cm holes which were closed immediately with rubber stoppers. Movement and persistence of lethal conce...
T L Highley, W E Eslyn
Performance of Tuff Brite C™ and other formulations against blue-stain, mold and brown-stain in freshly-sawn rubberwood (Hevea brasiliensis) in the humid tropics of Peninsular Malaysia
1997 - IRG/WP 97-30163
The relative anti-sapstain and anti-mold efficacies, including brown-stain development in freshly-sawn rubberwood (Hevea brasiliensis) in the Malaysian tropics, between selected water-based product concentrations of formulations Tuff Brite CTM without/with added Borax (at 1.5/0, 1/1.5, 1.5/1.5 and 2%/1.5%), PQ8TM without/with added Borax (at 2.5/0, 1.5/1.5, 2/1.5 and 2.5%/1.5%) and NeXgenTM/NeX-Br...
A H H Wong, T L Woods
Depth of foraging of subterranean termites in tropical Australia
1996 - IRG/WP 96-10141
Stakes of radiata pine (Pinus radiata D.Don) of varying lengths to 800 mm were inserted vertically in the soil with all but their lower 100 mm sheathed in a capped UPVC tube representing a physical barrier to termites. In one series of trials, termites were encouraged to aggregate at the upper ends of the tubes, in order to determine whether they would descend to the lower end of the barrier. In a...
L R Miller, M Hoschke, M Neal
Assessment of untreated Papua New Guinea timbers against subterranean termites. Progress report 2
1993 - IRG/WP 93-10040
Eight species of Papua New Guinea wood including Kwila (Intsia palembanica), Taun (Pometia pinnata), Malas (Homalium foetidum), PNG Walnut (Dracontomelon dao), Calophyllum (Calophyllum sp.), Kamarere (Eucalyptus deglupta), PNG Beech (Nothofagus spp.) and White Cheesewood (Alstonia scholaris) were exposed groun contact for their natural durability against subterranean termites. Inspection after 42 ...
M Rokova, H C Konabe
Evaluation of tropical wood by-products as a potential source for termite control products
2001 - IRG/WP 01-10408
Termites damaging in houses represent an ever growing threat in Europe, where the phenomenon has accelerated during the last ten years, as well as in the tropics, where infestations are permanent. To fight against this plague, the current methods used, through injection of organochloric or organophosphorized products into the timber structures and walls, are belonging to the past due to the toxici...
A Zaremski, S Robert, J-L Clement, D Fouquet
BG- an easiest preservative paste and its effective diffusibility in timbers for indoors and outdoors uses
2001 - IRG/WP 01-30253
After application of a newly formulated paste "BG-1" on all surfaces of air-dried lumbers, the boron have been found diffused completely in permeable and impermeable hardwoods at the rate of 12 mm radial thickness per week. The new paste may be a solution to protect lumbers being used or to be used under cover where timber is susceptible to termite and borer attack. The new cost effective paste wa...
A K Lahiry