Your search resulted in 2133 documents. Displaying 25 entries per page.
A critical view on early indicators for above ground field performance of wood
2013 - IRG/WP 13-20509
Above ground field tests are quite often a balancing act between the provision of realistic test conditions, reliable statistics, and acceptable long test durations. Within this study we therefore reviewed 543 data sets from above ground field tests performed…
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
…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 that were weathered for 18 months. Results show no apparent deterioration in…
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
…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 conditions were much harder than in the standard method. After six years’ exposure clear…
H Viitanen, S Metsä-Kortelainen, A Nurmi, S Jämsä
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…
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
…schedule. It focused on natural durability of timber tested in the field under above-ground conditions. In total 395 durability recordings from 31 different test sites worldwide and based on ten different test methods have been considered for the calculation of resistance factors: 190 for hardwoods and 205 for…
C Brischke, L Meyer, G Alfredsen, M Humar, L Francis, P O Flæte, P Larsson Brelid
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 opportunity for…
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
…in double layer field trials at 24 different European test sites under different exposure conditions (in total 28 test sets). The material climate in terms of wood moisture content (MC) and wood temperature was automatically recorded over a period of up to eight years and compared with the progress of decay. The…
C Brischke, A O Rapp
Mobility of Copper from MCQ in Shell-Treated Wood Exposed Above Ground
2010 - IRG/WP 10-30534
…of this copper will need to be mobile. A field exposure test was initiated and monitored for one year. Significant amounts of copper were detected in all leachates from MCQ-treated wood. The copper leaching from MCQ-treated wood was low but steady rather than the early flush and decline in loss typical of…
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
…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 specimens were treated according to NWPC class AB (UC3…
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
…and triazole-based formulations. A seven year lap joint test revealed a positive effect of BHT on the efficacy of quat-based formulations, especially at the low quat retention. The incorporation of BHT in a propiconazole-based system, however, showed an unexpected negative antioxidant effect at all levels tested.…
Xiao Jiang, D Biro, W Holcombe
Laboratory and above ground exposure efficacy of silicon-boron treatments
2009 - IRG/WP 09-30510
…the chemical approach with the necessary biological tests of the impregnated wood. The tested silicon-boron combinations ensured mass loss less than 5% in a standard EN 113 test with P. placenta and T. versicolor; the combinations were also very effective against larvae of H. bajulus at all concentrations. The…
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
…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 in ground…
F G Evans, P-O Flæte, G Alfredsen
Validity of above ground testing according to ENV 12037
2008 - IRG/WP 08-20379
The standard ENV 12037 for testing of treated and untreated wood (lap-joint) exposed above ground
was issued in 1996 by The European Committee for Standardization. A draft for the development of the standard was presented by CEN-TC 38/WG 25/DOC N 076 in 2002. For a test to become…
Ö Bergman, U Råberg, N Terziev
Above and Below-Ground Copper-Azole and Copper, Chrome Arsenate Depletion from Pinus radiata and Fagus sylvatica at Thirteen New Zealand & Australian Sites
2008 - IRG/WP 08-30460
…D. Don and Fagus sylvatica L. 20 x 20 x 500 mm field test stakes treated with a ground contact retention of copper amine plus tebuconazole (CuAz) and copper chrome arsenate (CCA) after approximately 5 years exposure to widely different soil and climate conditions. Site, wood species and their interactions had a…
R Wakeling
Above Ground Field Testing – Influence of test method and location on the relative performance of various preservative systems
2008 - IRG/WP 08-20393
Standardized above ground tests such as the lap-joint or test deck methods can be very slow in producing useful information on the relative performance of wood preservative systems. It often requires many years for decay to develop in wood treated to sub-optimal…
A Zahora
Accelerated Above-ground Testing of Wood Preservatives
2007 - IRG/WP 07-20358
…formulations, some of which are intended only for above ground uses. Canada’s Pest Management Regulatory Agency requires data from field tests under Canadian conditions but these can take many years to generate results. Forintek has therefore developed an accelerated above ground test, under contract to a…
P I Morris, S McFarling
Predicting the decay resistance of timber above-ground: 2. When can reliable field data be obtained?
2007 - IRG/WP 07-20368
…estimates for wood products are generally based on field tests, which involve periodic assessment of representative samples in specific assemblies. These tests often take decades to complete when naturally durable species are evaluated, despite the need for more timely durability characterisation, especially for…
L P Francis, A J Swain, J J Morrell
Protection of wood for above ground application through modification with a fatty acid modified N-methylol/paraffin formulation
2007 - IRG/WP 07-40378
…in significant decrease in water uptake in a submersion test of 40-50% when compared to that of untreated wood. The treatment slightly reduced the equilibrium moisture content at 60% and 90% relative humidity by 2% compared to untreated wood.
An anti-swell efficient (ASE) of 26.6% was achieved at a WPG of 15.7%…
Nguyen Hong Minh, H Militz, C Mai
Natural durability of Norwegian wood species for above ground applications – Project presentation and preliminary results
2006 - IRG/WP 06-10594
…hardwoods and imported species have been used in exterior above ground applications, often unfinished. For several wood species, especially hardwoods, information regarding the durability in use class 3 is lacking. The test procedures prescribed in the European standards, both laboratory and field tests, have some…
P O Flæte, G Alfredsen, F G Evans
Performance of boron-treated radiata pine in above ground field tests in New Zealand
2006 - IRG/WP 06-30406
Boron treatment was approved for exterior, above ground use in New Zealand in 1958, provide treated commodities were painted with a three-coat paint system. Above ground tests of rail units and L-joints were established at the NZ Forest Research Institute (now Scion) between 1967 and 1980 to monitor…
M Hedley, D Page
Performance of borate-treated lumber after 8 years in an above-ground termite field test in Hawaii
2006 - IRG/WP 06-30390
…report eight years of field study results from a protected above-ground field test in Hawaii simulating the sill plate (dodai) used in conventional Japanese housing construction. Field tests were established in both Hawaii and Japan to examine the efficacy of disodium octaborate tetrahydrate (DOT, 2% and 3% BAE shell…
J K Grace, A Byrne, P I Morris, K Tsunoda
Performance of borate-treated lumber in a protected, above-ground field test in Japan
2006 - IRG/WP 06-30395
…of the Japanese houses was conducted at the termite field test site of the Research Institute for Sustainable Humanosphere of Kyoto University in Kagoshima Pref., Japan where two economically important subterranean termite species [Coptotermes formosanus Shiraki and Reticulitermes speratus (Kolbe)] are established.…
K Tsunoda, A Byrne, P I Morris, J K Grace
Above and Below-Ground Depletion of Copper, Chromium and Arsenic from Pinus radiata and Fagus sylvatica at Thirteen Test Sites in New Zealand and Australia
2006 - IRG/WP 06-30402
…arsenate preservative (CCA) from 20 x 20 x 500 mm field test stakes after 5.5 and 4.5 years for pine and beech respectively. At least 5 sacrificial stakes were used to produce site means. Site and wood species had a major effect on copper, chromium and arsenic loss from CCA treated pine and beech. At the most…
R Wakeling