Your search resulted in 491 documents. Displaying 25 entries per page.
Water absorption and desorption of non treated, pressure impregnated, and pine oil treated glulam made of small diameter Scots pine and Norway spruce
2012 - IRG/WP 12-40616
A growing proportion of harvested timber originates from the first or second commercial thinning stands in Finland, which means smaller average log volumes in comparison to final felling stands. Smaller log volume means challenging wood properties such as higher proportion of juvenile wood and sapwood. Due to these facts, products made of small diameter logs are prone to twist and check, and have ...
H Heräjärvi, V Möttönen, R Stöd
Survival of Bursaphelenchus xylophilus exposed to different active ingredients of wood protectors
2013 - IRG/WP 13-10802
The pine wilt nematode (PWN) Bursaphelenchus xylophilus (Steiner and Buhrer 1934) Nickle, 1970 is a quarantine organism with a high potential to damage Conifer forests in Europe. This has driven the European Union to protect forest stands from the propagation and dispersion of this pathogen.The nematode was first detected in Europe in Setubal (Portugal) in 1999 and eradication measures were taken....
S C Arcos, M T Troya, L Robertson, F Llinares, M Conde, A Navas
Quasi-in-situ durability tests on oak timber bridges
2013 - IRG/WP 13-20510
This study aims on developing a method for determination of wood durability on samples taken from real structures in service. Therefore quasi-in-situ durability tests have been conducted exemplarily on timber bridges made from English oak (Quercus robur L.). Drilling cores were found to be a feasible alternative to standard specimens for laboratory durability tests against pure cultures of Basidio...
C Brischke, C J Behnen, M-T Lenz, K Brandt, E Melcher
Testing the performance of timber using 27 different field test methods
2013 - IRG/WP 13-20517
Numerous test methods to determine the durability of timber and timber products have been described in relevant literature. However, only some of these methods have been standardized and thus only very few are regularly used for resistance tests in the field. Since results from extensive comparative field studies have shown differences in moisture performance between different test methods, the ai...
L Meyer, C Brischke, J Rieken
Extraction and analysis of DNA from green and seasoned timber as basic methods for determination of wood species and origin
2013 - IRG/WP 13-20523
Against the background of the European timber trade regulation EUTR, commenced to law by March 2013, the determination of wood species and tracing of its origin is getting a great importance. A promising approach for establishing fast and reliable tracking systems for wood products is DNA analysis. A critical point is the extraction of analysable DNA from the wood and its lignified cell walls. Thu...
K Jacobs, H Mende, W Scheiding
Virulence of two Laboratory Test Strains and one Natural Isolate of Rhodonia (Oligoporus) placenta against Thermally Modified Pine and Beech Wood
2013 - IRG/WP 13-20524
Rhodonia (Oligoporus) placenta is known as a relative aggressive basidiomycete fungus against thermally modified timber. In durability lab tests, this often results in a lower durability class, compared to other test fungi. In the reported work, the virulence of three different strains of Rhodonia placenta for untreated and thermally modified timber was determined and compared. Therefore, two lab ...
K Plaschkies, W Scheiding, K Jacobs, N Rangno
Performance of untreated wood and wood impregnated with copper-ethanolamine based preservative solutions in Northern Adriatic Sea
2013 - IRG/WP 13-30623
Sea water applications of wood are among the most challenging ones. Impregnated wood is exposed to leaching and to variety of marine borers, Limnoria sp. and Teredo sp. being the most important. In the present research, durability of pine wood impregnated with copper-amine based preservative solution (Silvanolin) of different concentrations, exposed to the sea water, was investigated according to ...
M Humar, M Petrič, J Adamek, B Lesar
Application of a model for the prediction of fungal degradation of thermally modified beech timber by Trametes versicolor
2013 - IRG/WP 13-40622
Colour measurement technology is found to be feasible for characterization of the property changes of thermally modified timber (TMT). In opposite to time-consuming and expensive laboratory tests a non-destructive test represents an improvement for the manufacturer of TMT. Therefore the aim of this study was to develop a method which allows sorting the different treatment intensities after the man...
Clauder, L., Richter S., Unger, W., Pfriem, A
Field performance of wood impregnated with siloxanes using supercritical carbon dioxide
2013 - IRG/WP 13-40632
This paper presents preliminary results from a 13-month field test containing pine sapwood samples (Pinus sylvestris) impregnated with a mixture of siloxane and organic biocides using supercritical carbon dioxide as carrier. Samples were exposed above ground at a Danish field test site using matched non-treated sapwood controls for every treated sample. All samples were painted before exposure. Pi...
A Kjellow, F Imsgard, J Fernandes, R Wagner, J Delis
Modelling the risk for mould growth on timber stored outdoors protected from rain
2013 - IRG/WP 13-20529
A mould resistance design (MRD) model was used to calculate the maximum duration of storage of timber outdoors under cover (protected from rain) before the onset of mould growth on the surface of wood. The prediction model is based on laboratory tests performed in constant and cyclic climates and were also confirmed against exposure tests in attics and crawl spaces. The prediction model presented ...
E Frühwald Hansson, S Bardage, S Thelandersson
The development of accelerated test systems to evaluate the durability of framing timber
2014 - IRG /WP 14-20547
Various accelerated decay resistance trials including small simulated wall units, samples exposed in enclosed tanks and ‘I’ samples in stacks have been explored and used to test the durability of treated and untreated radiata pine framing at Scion since 2001. These testing methods have been established to determine the effectiveness of commercial formulations in preventing decay in framing sub...
T Singh, D Page, J van der Waals
On-site remediation treatments for framing timber in leaky buildings
2014 - IRG/WP 14-20549
Weathertightness failures in New Zealand buildings due to the combined effects of cladding choices, design and construction faults and the use of untreated framing timber has led to the so called ‘leaky building syndrome’. The latest estimated cost of the leaky building crisis in New Zealand is about NZ$11 billion.
This research was conducted to provide a better understanding of the option...
T Singh, D Page, A Bennett
Efficacy of commercial wood preservatives against Bursaphelenchus xylophilus, a quarantine organism in Europe
2014 - IRG/WP 14-30638
Bursaphelenchus xylophilus (Steiner and Buhrer 1934) Nickle, 1970, pine wilt nematode (PWN), is a quarantine organism with a high potential to damage Conifer forests in Europe. This has driven the European Union to protect forest stands from the propagation and dispersion of this pathogen. Since the nematode was detected in Europe, eradication measures were taken. However, these measures were unsu...
C S Arcos, A Navas, L Robertson, M T Troya, M Conde, F Llinares
Laboratory investigation of fire protection coatings for creosote-treated timber railroad bridges
2014 - IRG/WP 14-30639
As the incidence of timber railroad bridge fires increases, so has the need to develop protective measures to reduce the risk from accidental ignitions primarily caused by hot metal objects. Of the six barrier treatments evaluated in the laboratory for their ability to protect timbers from fires sourced with ignition from hot metal objects only one intumescent coating provided adequate fire prote...
C A Clausen, R H White, J P Wacker, S T Lebow, M A Dietenberger, S L Zelinka, N M Stark
CreoSub – New protection technology to substitute creosote in railway sleepers, timber bridges, and utility poles
2014 - IRG/WP 14-30644
Creosote oil is one of the oldest industrially used wood preservatives. Due to its toxic profile, the European Commission has restricted the use of creosote specific applications, but it is highly controversial within the European Commission. Its approval for use after 2018 is very questionable and may depend on derived research results until then, i.e., the viability of alternatives developed to ...
U Hundhausen, K-C Mahnert, A Gellerich, H Militz
Resistance to Decay Fungi of Scots Pine Impregnated with Natural and Chemical Preservatives
2014 - IRG/WP 14-30650
In this study, heart-wood and sap-wood specimens of the Scots pine which is naturally grown in Turkey were treated with natural (valex) and some chemical preservatives such as CCA - C (Copper / Chrome / Arsenic), CBA - A (Copper / Boron / Azole). The wood protective efficacies of these preservatives were investigated by means of fungi decay test (EN 113).
As a result of the study it was found t...
S Yildiz, U B Şimşek
Copper and chromium leaching from wood impregnated with chromium-copper containing preservatives: Results of different studies
2014 - IRG/WP 14-50300
Copper and chromium based wood preservatives remained one of the most important ingredients for wood protection solutions for protection of wood in demanding applications all-over the world. Leaching of heavy metals from treated wood is important from two different aspects; firstly from performance point of view, and secondly from environmental issues. However, the importance of these studies is i...
M Humar, N Thaler, E Melcher
An update on durability of New Zealand grown timber
2015 - IRG/WP 15-10851
Classification and predication of in-service performances of naturally durable timber is much more difficult than preservative treated timber due to the variability of wood properties within and between trees of the same species and the variable nature of the hazard to which the timber will be exposed. A combination of field test and in-service testing has been used to classify the suitability of ...
D Page, T Singh
Bamboo: A poor man’s timber
2015 - IRG/WP 15-10852
Bamboo, known as poor man’s timber in the past gained some importance in the last decade when TIFAC under Department of Science & Technology and Ministry of Agriculture awoke to find a better future for this unique gift of nature. Until then it was considered a good for nothing grass suitable only for making paper and building effigies of Ravan, Kumbhkaran and Meghnath year after year at Dussehr...
S Kumar
Evaluation of color and gloss in decorative applied to cases of Pinus radiata wood impregnated (D. Don) copper type C azole micronized
2015 - IRG/WP 15-20571
Six treatments (one control and five decoration coatings) were applied to radiata pine wood treated with micronized copper azole (uCA-C), for outdoor use (R3) at a rate of 3.08 kg/m3 retention (T2). One decoration coating was applied before impregnation treatment: Prestain P (T3), and two, were applied in mixture with the uCA-C preservative Black Cylinder (T5) and Red Cylinder (T4). Two varnish we...
R Garay, M Inostroza
Wood protectors to control Bursaphelenchus xylophilus
2015 - IRG/WP 15-30661
Bursaphelenchus xylophilus, the pine wilt nematode (PWN), is a quarantine organism with a high potential to damage Conifer forests in Europe. The European Union is concerned in the protection of forest stands from the propagation and dispersion of this pathogen. In this line, the current control measures have been unsuccessful in preventing the dispersion of this organism, as it continues to be de...
M T Troya, C S Arcos, A Navas, L Robertson, M Conde, F Llinares
Performance of kiln-dried and air-dried anti-sapstain treated pallet timber under use scenarios against wood discolouring fungi
2015 - IRG/WP 30669
During their lifespan there is a high probability that wooden pallets and packaging material will be exposed to rainfall or rewetting conditions, increasing the risk of growth of discolouring fungi. Kiln-drying of wooden pallets and packaging material without anti-sapstain treatment does not give efficient protection against wood discolouring fungi during rewetting periods. However additional temp...
A Steitz, E Stoyanova, N Pfabigan, R Gründlinger
Remedial treatment of difficult to access timber in buildings
2015 - IRG/WP 15-40691
The quest to understand remedial treatment for timber framing begun following the ‘leaky building crisis’ in New Zealand which came to prominence in 2000. Several in-situ remedial treatment products are used in New Zealand. However, effectiveness of these treatments is still unclear particularly in situations where not all faces of the timber can be assessed. This research was conducted to det...
T Singh, I Simpson, D 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
Fungal decay of archaeological waterlogged oak timber: role of the mineral content
2016 - IRG/WP 16-10873
In service, wood foundation poles are subjected to water level fluctuation in soil. While wood is saturated by water only bacterial decay occurs. When oxygen content increases and moisture content decreases, severe fungal attack may occur. To evaluate the long term fungal durability of wood foundation pole in the context of service, 300 years waterlogged archaeological wood poles were used. The oa...
A Besserer, M Letellier, E Fredon, Q Kleindienst, M-L Antoine, C Perrin, J Lallemand, C Rose, M-C Trouy