Your search resulted in 117 documents. Displaying 25 entries per page.
Shells of Coconut and their Durability against Termite Attack
2015 - IRG 15-10853
All tropical and subtropical areas of the Earth are inhabited by termites. In climates with moderate temperatures, they occur less frequently. Especially wood and non-wood materials that grows in tropical areas and used there in timber constructions and woodworking, wood durability and protection against termites should be researched. This paper reports findings from an experimental “AW011” la...
M Dass, A H H Wong, W Unger
Performance of 3-iodo-2-propynyl butyl carbamate (IPBC) in L-joints under tropical conditions
2016 - IRG/WP 16-30688
The ability of 3-iodo-2-propynyl butyl carbamate (IPBC) to protect wood against fungal decay out of soil contact was evaluated using ponderosa pine L-joints at two exposure sites over a 12 year period. IPBC tended to provide better protection when formulated in an organic solvent and when applied using a double vacuum treatment. Performance also tended to be better when systems contained a water...
J J Morrell
A Case Study of Long-term CCA Preservative Leaching from Treated Hardwood Poles in a Humid Tropical Condition
2016 - IRG/WP 16-50324
Chromated copper arsenate (CCA)-treated Malaysian hardwoods have long been used as utility poles, posts, construction piles and motorway fencing in soil contact exposed to the threats of decay fungi and termites. Despite global concerns citing predominantly temperate conditions of long-term leaching of CCA toxic heavy metals from wood into surrounding soils and groundwater since the 1990’s, the ...
A H H Wong, W S M Chin
Durability Testing of a Cattail (Typha spp.) based Insulation Material against Termite Attack
2017 - IRG/WP 17-10879
The use of insulating materials is particularly important in the construction industries, especially with regard to the use of wood and naturally occurring substances. The use and durability of natural materials as insulating materials is of keen interest to many construction experts, and continues to be a topic of intense investigation. It is generally agreed that the use of natural substances ...
M Dass, W Unger, T L Woods
Assessing the natural durability for different tropical timber species using the mini-block test
2017 - IRG/WP 17-10886
The Xylarium in the Royal Museum for Central Africa (RMCA, Tervuren, Belgium) contains over 60,000 wood-samples, comprising over 12,000 species. These samples are of great historical and scientific value yet have a random format, which complicates standard testing. The wood-durability against Coniophora puteana and Trametes versicolor was tested for 36 species. Due to the random sample sizes the s...
V Deklerck, I De Windt, N Defoirdt, J Van den Bulcke, H Beeckman, E Espinoza, J Van Acker
Evaluation of the Virulence of the Termite Species Occurring in the French Tropical Overseas Territories
2018 - IRG/WP 18-10913
The French tropical overseas territories are strongly affected by termites’ activity, which is especially devastating because the species encountered there are among the most virulent in the world. That is why in these regions it is particularly important that producers and users of wood-based products are provided with materials and preservative products whose durability and efficacy has been t...
M Kutnik, I Paulmier, J Vuillemin
Determining the natural durability on xylarium samples: mini-block test, wood powder and chemical profiling
2019 - IRG/WP 19-10944
Xylaria, or wood collections, can be considered sleeping beauties in terms of wood technological and biological output. In this study we focus on determining the natural durability of xylarium specimens from the Federal Xylarium in the Royal Museum for Central Africa. The Federal Xylarium contains over 80,000 specimens, covering more than 13,000 species, mainly from Central Africa. These specimens...
V Deklerck, L De Ligne, J Van den Bulcke, E Espinoza, H Beeckman, J Van Acker
Durability of tropical species from Peru according to European Standards
2020 - IRG/WP 20-10964
Natural durability is defined as the intrinsic resistance of wood against the attack of destructive organisms. There are standardized methods to estimate a durability value. In Europe, the standard EN-350 is responsible for establishing the basic guidelines, as well as the necessary tests to determine this value, which is essential to know the degree of protection needed for the tested wood to ext...
J Valdivia, P Gómez, M T Troya, L Robertson, J A Martín, A Loayza
Field tests of different tropical wood species in sea water
2022 - IRG/WP 22-30773
A number of tropical timbers have been tested according to EN 275 at Kristineberg Marine Research Station in Sweden since 1999. Most of these tests have started during the last 5-8 years.
Wood species included have been Lophira alata (Azobé/Ekki), Minquartia guianensis (Manwood/Acaria), Chlorocardium rodiei (Greenheart), Cyclodiscus gabonensis (Okan/Denya), Shorea spp. (Bankirai), Dicorynia guia...
M Westin, P Larsson Brelid
Unlocking the potential of tropical fast-growing hardwood species
2023 - IRG/WP 23-11010
Social forestry or community managed forestry practices have been promoted as an inclusive way to mitigate climate change through the framework of the UNFCCC scheme of the Reduce Emission Deforestation and forest Degradation (REDD+) programme. Fast growing wood species are one of the least tapped social forestry commodities in Southeast Asia, and they have the potential to be upscaled to meet the ...
S Fauziyyah, R Wimmer, C Brischke
Natural durability of tropical plantation woods case in teak
2023 - IRG/WP 23-11011
Teak (T. grandis) is one of the most popular tropical timber species when it comes to the natural durability. High value of teak timber is attracting the attention to expand fast growing teak plantations, and the natural durability of plantation teak wood has been examined in various provenances of tropics. Natural durability of plantation and natural teak wood using three disks was examined throu...
K Yamamoto
Natural durability of 9 tropical species suitable for round wood timber building: fungi and termites laboratory screening tests
2023 - IRG/WP 23-11013
In numerous tropical forest species, wood properties are poorly described and wood is under-valorized. Especially very few is known about small diameter trees although they may be used, directly as round wood, in construction timber building. A selection of abundant species was done and characterization tests were performed to assess their usability as building material. The aim of this work was t...
M Leroy, K Candelier, J Damay, J Bossu, R Lehnebach, M-F Thevenon, J Beauchene, B Clair
Long-term Performance of Treated Timbers in a Sub-tropical Marine Exposure
2023 - IRG/WP 23-11015
The long-term performance of preservative-treated and modified wood in marine exposures was assessed in Brisbane, Queensland, Australia. This report describes the final destructive assessment of the surviving Australian panels after 11 years of exposure. This site presents the potential for attack by shipworms (likely Bankia spp.), pholads (Martesia striata), Limnoria and Sphaeroma terebrans. Mos...
E L Galore, J Norton, A Zahora
Accelerated surface mould testing for exterior wood treatment in Temperate, Tropical and Laboratory environments
2023 - IRG/WP 23-20699
Mould attack is a very common cause of discoloration on wooden surfaces and can subsequently promote development of wood decay by other organisms. Prevention of mould growth is relevant for both pigmented wood paints as well as more transparent systems with a high or low amount of binder. The use of commercial biocides has led to effective microbiological inhibition in many contexts, but the incre...
A Nazeri, J Stenbaek, T R Laursen, A H H Wong, B M Hasnul
A novel wood preservative with vegetal extracts-cypermethrin mixture protects H2-weathered envelope-treated tropical hardwood kempas against Coptotermes termites
2023 - IRG/WP 23-30794
In accordance with sustainability development initiatives by commercial wood protection to conceive of cost-effective, environmentally acceptable wood treatment solutions replacing traditional biocides, this paper reports an aboveground subterranean termite test of termite-susceptible heartwood blocks of the tropical (Malaysian) structural hardwood kempas (Koompassia malaccensis) envelope-treated ...
D Messaoudi, A H H Wong
Envelope wood protection against subterranean termites under H2-hazard class tropical environment by a new generation wood preservative with vegetal extracts-cypermethrin mixtures
2023 - IRG/WP 23-30795
Wood protection industries in progressive economies globally are compelled to develop cost-effective, environmentally acceptable wood treatment solutions for long term carbon storage in wood materials/products while appealing to consumer demands for low environmental impact treated wood. A new generation wood preservative, based in part on 2% vegetal extracts and 0.16% cypermethrin components, has...
D Messaoudi, A H H Wong
Laboratory evaluation of PA1b, an insecticidal protein extracted from pea seeds (Pisum sativum), as bait active ingredient against the subterranean termite Coptotermes gestroi (Blattodea: Rhinotermitidae) in tropical zones
2024 - IRG/WP 24-11038
Coptotermes gestroi (Wassman 1896) is one of the worst pests in tropic areas, economically. Two types of curative methods are used since decades to eliminate colonies that attack constructions: injection of biocidal treatment solutions on wood, walls and soil, and population control using baits. In application of the current regulations, the first technique can no longer be used in Europe, to lim...
J Vuillemin, D Messaoudi, P da Silva