Your search resulted in 654 documents. Displaying 25 entries per page.
Above-ground performance of a buffered amine oxide treatment system against Mastotermes darwiniensis
2016 - IRG/WP 16-10855
Above-ground H2 field tests against Mastotermes darwiniensis were conducted in far north Queensland to assess the efficacy of buffered amine oxide treatments in the softwoods Pinus sylvestris and P. radiata, and the hardwoods Eucalyptus regnans and E.…
L J Cookson, R W Clawson Jr
Moisture induced risk and fungal development in various field test set-ups in and above ground
2016 - IRG/WP 16-20577
A high number of studies on the decay performance of wood in outdoor exposure have been conducted in the past. However, no testing methodology for wooden components exposed above ground reflecting the variety of different loads has been established so far. Man…
L Meyer-Veltrup, C Brischke
Bundle tests - Simple alternatives to standard above ground field test methods
2016 - IRG/WP 16-20581
…pine sapwood (Pinus sylvestris L.) which are frequently used as reference or control species in wood durability field tests. The overall aim of this study was to find a simple alternative method to the few standardized above ground field test methods, such as the L-joint and the lap-joint methods, and to overcome…
C Brischke, L Meyer-Veltrup
Engineering for Rural and Civil Development. Uni Performance of wood exterior structures above ground contact in Spain built with softwood species. The situation of cases in northern Spain
2016 - IRG/WP 16-20597
…and glue-laminated wood. Most of these exterior structures used softwood wood species such as fir, spruce, larch and pine. In Spain wood exterior structures, as for example bridges, became more and more popular since eighties, when sawn and glue-laminated wood were utilized for building exterior wooden structures in…
D Lorenzo, J Fernández-Golfín, M Touza
Above ground field testing: results of experiments in Brazil after one year
2015 - IRG/WP 15-30660
…of four internationally-recognized standards were used to evaluate the effectiveness of wood preservatives products softwood in a species with no natural resistance (Pinus sp.). The assessment consisted of the simulation of aggressive environment for wooden structures used outdoors, such as door frames and…
M F Natale, J M Vidal
Microbial Community Analysis of Naturally Durable Wood in an Above Ground Field Test
2014 - IRG/WP 14-10826
This paper presents preliminary results of an above ground field test wherein eight naturally durable wood species were exposed concurrently at two sites in North America. Surface samples were taken at regular intervals from non-durable controls and compared t…
G T Kirker, S V Diehl, P K Lebow
Borate Redistribution in Glulam in an Above Ground Field Test
2014 - IRG/WP 14-30652
Researchers have refocused on the use of boratesin the wood protection industry in the last two decades due to their broad spectrum effectiveness against fungi and insects, and favourable environmental characteristics. This study was designed to determine borate distribution in a…
P I Morris, A Temiz, J Ingram
Effect of polyurea coatings on performance of Douglas-fir in tropical above ground exposures
2014 - IRG/WP 14-40665
The potential for using polyurea barriers to limit fungal and termite attack was investigated on Douglas-fir lumber and timbers. Termites were capable of penetrating the barrier to attack non-treated wood as well as wood dip-treated with disodium octaborate.…
S Uysal, J J Morrell
Update on "Sandwich" Type Above Ground Field Test Methods
2013 - IRG/WP 13-20506
Our research group has been investigating a number of new designs for above ground field testing to try to provide rapid methods to compare the relative performance of systems in above ground, unprotected exposures. This paper provides an update on what we ha…
A Zahora, L Jin, A Preston
A critical view on early indicators for above ground field performance of wood
2013 - IRG/WP 13-20509
…overall test duration can be significantly reduced. The use of ‘earlier’ predictors turned out to be problematic due to high variation of field test results, which are mainly related to the wide range of moisture regimes within above ground exposure. For in ground situations, rating 4, ‘failure’, is…
C Brischke, L Meyer, G Alfredsen, P-O Flæte, L Francis, M Hansson, P Larsson Brelid, J Jermer
Changes of fungicidal, mechanical and sorption properties of wood during above ground outdoor exposure
2013 - IRG/WP 13-20513
…Norway spruce (Picea abies)) that were exposed in the 3rd use class (CEN, 1992) for periods between 4 and 30 months. EN 113 laboratory test indicated an increased susceptibility of chestnut wood to fungal decay. After 12 weeks of exposure to brown rot Gloeophyllum trabeum mass loss of 4.3% was determined on samples…
N Thaler, M Humar
Accelerated H3 above-ground decay testing
2013 - IRG/WP 13-20520
An above-ground H3 fungal field trial was installed at two sites in Australia and one in New Zealand, as well as in two Accelerated Field Simulators. The aim was to find a method that would shorten the time required for evaluating new preservatives and…
L J Cookson, D Page, T Singh
Decay resistance of thermally modified Scots pine after 6 years’ exposure above ground
2013 - IRG/WP 13-40624
In the present study the performance of boards treated by ThermoWood process were studied above ground and the results given are based on a “modified” horizontal double- layer test. The base layer of boards was in direct contact with ground and the conditi…
H Viitanen, S Metsä-Kortelainen, A Nurmi, S Jämsä
Above Ground Field Evaluation and GC-MS Analysis of Naturally Durable Wood Species
2012 - IRG/WP 12-10764
Nine wood species are being evaluated in above ground field studies in Mississippi and Wisconsin. Candidate naturally durable wood (NDW) species are being rated at yearly intervals for resistance to decay, cupping, and checking. Field ratings after 12 months e…
G T Kirker, A B Blodgett, S T Lebow, C A Clausen
Long term durability of the heartwood of seven common softwood species in above ground conditions
2012 - IRG/WP 12-10771
The natural durability for wood in above ground use has been evaluated based on results after 11 years of exposure in a test site situated at the Danish Technological Institute in Taastrup, Denmark. Selected results for seven common softwood species exposed horizontally are reported. The test results cover…
E Tang Engelund, M Klamer, T Mark Venås, B Lindegaard
Durability of timber products –Part 1: Inventory and evaluation of above ground data
2012 - IRG/WP12-20498
…the reference magnitude varies between locations because of climatic differences. Durability classification is therefore based on comparing a certain performance indicator between the timber in question and a reference timber. Finally, the relative values (= resistance factors) are grouped and related to…
C Brischke, L Meyer, G Alfredsen, M Humar, L Francis, P O Flæte, P Larsson Brelid
Quantitative design guideline for wood outdoors above ground applications
2011 - IRG/WP 11-20465
…for wood in outdoor above ground applications, i.e. use class 3 according to EN 335. The guideline has been developed in the European research project WoodExter and can be seen as a first prototype for a quantitative design tool in the area of wood durability. It is based on a defined limit state for onset of…
S Thelandersson, T Isaksson, E Suttie, E Frühwald, T Toratti, G Grüll, H Viitanen, J Jermer
Above ground testing at tropical test sites, what have we learned?
2011 - IRG/WP 11-20473
Three different above ground test methods have been utilized at a selection of five tropical and sub-tropical test sites with a variety of treated and untreated material. The results show that a multi-site approach to above ground field tests presents the opp…
A Preston, A Zahora, Y Cabrera, L Jin, C Schauwecker, P Walcheski
Service life prediction of wooden components – Part 1: Determination of dose-response functions for above ground decay
2010 - IRG/WP 10-20439
…for service life prediction of wooden components. The use of the combined material climatic parameters MC and wood temperature led to a feasible dose-response function and turned out to be a useful basis for service life prediction. How to apply this approach for estimating the expected lifetime of wooden…
C Brischke, A O Rapp
Mobility of Copper from MCQ in Shell-Treated Wood Exposed Above Ground
2010 - IRG/WP 10-30534
…but it has still performed very well. This is because copper migrated into checks and prevented germination of basidiospores on the freshly exposed untreated wood. Unlike soluble copper systems, MCQ has its copper primarily in the form of small basic copper carbonate particles. For MCQ to be effective as a…
R Stirling, P I Morris
Field trials of wood preservatives in UC3 retention. Part 1. Durability results after 13 years in and above ground
2010 - IRG/WP 10-30548
…treated with chromium and arsenic free preservatives in Use Class 3 retention. Apart from durability in and above ground, other features were also assessed, e.g. discoloration by staining fungi, depletion of active ingredients, weathering and corrosion of fasteners in con¬tact with the treated wood. Wood…
M Westin, J Jermer, M-L Edlund, P Larsson Brelid, I Johansson
Accelerated H3 above-ground decay trials in Australia
2009 - IRG/WP 09-20411
An above-ground H3 fungal field trial was installed at five sites (3 in Australia, 2 in New Zealand), with the aim of finding a method that would shorten the time required for evaluating new preservatives and protection systems. One-quarter of the H3…
L J Cookson, J Carr
Impact of an Antioxidant on the Efficacy of Quaternary Ammonium Compounds (Quats) and Triazoles – Seven Year Above-Ground Study
2009 - IRG/WP 09-30504
…been reported that antioxidants have great potential for use with organic biocides in the area of wood protection. This paper demonstrates the impact of a low level of the antioxidant butylated hydroxytoluene (BHT) on the efficacy of quat-based and triazole-based formulations. A seven year lap joint test revealed a…
Xiao Jiang, D Biro, W Holcombe
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 chemi…
N Terziev, D Panov, A Temiz, S Palanti, E Feci, G Daniel
Natural durability of different wood species in above ground applications - Weight and MOE loss
2008 - IRG/WP 08-10667
…various Norwegian hardwoods or imported species, have been used in exterior above ground applications, often not surface treated. For several wood species, especially hardwoods, information regarding the durability in use class 3 is limited. Most information given in EN 350 part 2 is based on testing of the heartwood…
F G Evans, P-O Flæte, G Alfredsen