Your search resulted in 1058 documents. Displaying 25 entries per page.
Termite Resistance of Different Wood Panels Treated with Bifex® under Laboratory and Field Trials
2011 - IRG/WP 11-10745
The effects of Biflex® on termite resistance of laminated chip Board, MDF (Medium Density Fiber), Ply Wood and Veen Board at 50 ppm were evaluated. Laboratory and field trials resistance tests showed that all woods treated with Biflex were resistant to termites as compared to untreated ones. It was concluded that as chemical loadings increased, termite mortalities increased, and at the same time...
F Manzoor, S A Malik, B M Ahmed Shiday, A Liaquat, N Naz
Natural durability of wood tested in different environments in Northern Europe
2011 - IRG/WP 11-10747
Moisture is often recognised as a key factor regarding the long time performance of wooden products, and one of the main challenges for timber products is to predict accurate service life in use class 3 (not covered above ground) and use class 4 (in soil or fresh water contact). A range of durability classification studies have been performed both in field and laboratory. But for several wood spec...
P O Flæte, G Alfredsen, F G Evans
Decay hazard mapping for Europe
2011 - IRG/WP 11-20463
In this study, two different dose-response models for above-ground decay as well as a model transferring macro climate data to wood climate data are presented. The models base on data from field trials, which had been conducted at 28 European test sites, and were used to calculate the relative risk for decay caused by climate variability in Europe. The two dose-response models give coherent result...
C Brischke, E Frühwald Hansson, D Kavurmaci, S Thelandersson
Service life prediction of wooden components - Part 3: Approaching a comprehensive test methodology
2011 - IRG/WP 11-20464
This paper is the third in a series on 'service life prediction' of wooden components and should be considered as a discussion paper. The authors tried to analyze the topic with a look from a distance and comment sometimes with a smile on the current controversial discussion about SLP issues. Nevertheless, the viewpoints of different groups, such as natural scientists, engineers, approva...
C Brischke, C R Welzbacher, L Meyer, T Bornemann, P Larsson Brelid, A Pilgård, E Frühwald-Hansson, M Westin, A O Rapp, S Thelandersson, J Jermer
Methods of field data evaluation - time versus reliability
2011 - IRG/WP 11-20466
Field testing of wood and wood-based products is so far the most reliable way to get information on performance with respect to durability and expected service life. However, field trials are extremely time and cost consuming. The main objective of the present study was to investigate possible correlations between early stages of decay, preferably during the first 5 years, and the actual service l...
P Larsson Brelid, C Brischke, A O Rapp, M Hansson, M Westin, J Jermer, A Pilgård
Decay initiation in plywood, OSB and solid wood under marginal moisture conditions
2011 - IRG/WP 11-20469
Hygrothermal models are increasingly used as research tools by building scientists and and design tools by designers to simulate heat, air, vapour, and water movements within and through building envelope and even to predict the consequences in terms of mould/decay growth and metal corrosion. This work was designed to generate data on decay initiation under marginal moisture conditions to support...
Jieying Wang, P Morris
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 exposure to un-predicted biodeterioration hazards, which may be important for developmental products of poorly characterized fu...
A Preston, A Zahora, Y Cabrera, L Jin, C Schauwecker, P Walcheski
A Method for Studying Boron Redistribution and Leaching in Timber Framing
2011 - IRG/WP 11-20476
In typical New Zealand timber framed house construction, the timber framing has a vapour permeable building wrap applied to the exterior and a cladding applied over 20 mm battens. An interior lining usually of gypsum plasterboard is then fixed once the timber framing has a moisture content of < 20%. Timber framing within the building envelope is not expected to be wet in-service or exposed to a le...
J A Drysdale, N Marston, M E Hedley
Ten Year Field Tests of Borate-Treated Wood Against Subterranean Termites
2011 - IRG/WP 11-30557
In the mid 1990s, Forintek Canada Corp. initiated a study of the termite resistance of borate-treated lumber above ground, protected from rain in Canada, Japan and Hawaii. Predominant termite species at three test were Reticulitermes flavipes in Canada, and Coptotermes formosanus in both Japan and Hawaii. The material included hemlock and amabilis fir lumber treated with disodium octaborate tetrah...
P I Morris, J K Grace, K Tsunoda
The durability of acetylated radiata pine sapwood (Accoya). Results from five years testing
2011 - IRG/WP 11-30560
New Zealand grown radiata pine sapwood was modified using the Accsys PLC acetylation process (Accoya). Following treatment, various test samples were exposed in the Scion Accelerated Field Test facility (Fungus Cellar) and in exterior ground contact field tests. In the Fungus Cellar, performance was compared with that of radiata pine treated with CCA to Hazard Classes H3.2 (0.37% m/m Cu+Cr+As) and...
M Hedley, D Page, J van der Waals, K Nasheri, G Durbin
Novel Approaches to the Development and Testing of Anti After-glow Additives for CCA-based Treatments of Poles
2011 - IRG/WP 11-30561
In this paper, a field fire stake testing screen method is described. This method uses stake samples from matched wood sources allowing replicates from different boards to be included. The method is easy to control and can provide quick comparative fire resistance test results. The parameters measured from the tests are percentage weight loss, minimum residual circumference and residual thicknes...
L Jin, P Walcheski, A Preston
Standardized Field Trials with Micronized Copper
2011 - IRG/WP 11-30564
In 2008, an extensive review of all available data from standardized tests of micronized copper systems was published and there has been considerable work since then. This paper discusses over 20 field stake trials underway in well-known sites such as Gainesville, FL, Hilo, HI and the Dorman and Saucier sites in MS as well as tests from Australia and New Zealand. In addition, 4 ground proximity ...
C R McIntyre, M H Freeman
Comparison of rates of wood decay from four different field test protocols following 4-5 years exposure at a site in New Zealand
2011 - IRG/WP 11-30565
The rate of decay of Pinus radiata was evaluated using four different field test protocols at a site near New Plymouth, New Zealand. The average Scheffer index was 86 over the five year period of testing. The field tests were an in-ground stake test (AWPA Std E7-01) and three above ground tests – lap-joint (AWPA Std E16-98), decking (AWPC protocol) and ground proximity tests (AWPA Std E18-06) T...
P Lobb, K Day, A Siraa
Termite resistance of timber envelope treated with imidacloprid then modified by typical building site operations
2011 - IRG/WP 11-30570
Imidacloprid is a new envelope insecticide approved by Australian regulatory authorities for framing timber. It is a non repellent insecticide. Results are reported for timber envelope treated with imidacloprid and altered post treatment with typical building site operations to expose untreated surfaces. These modifications included, cutting, notching and drilling. Pinus radiata timber samples w...
K Day, A Siraa, P Lobb
Protective Levels of Borates in timber Foundation Piles 5 – 18 Years after In-situ Remedial Treatment in Areas with Wet Clay Ground Conditions. The Jerbor and Eurobor Protocol, Part 1.
2011 - IRG/WP 11-30571
Timber has been used as foundation piles and grillages for decades or even centuries. Since the late 1970s a method for investigate, analyze and treat building timber foundations in soft clay grounds against decay fungus with a biocide have been developed and used by the late professor Allan Jerbo. Settling of buildings in soft clay grounds is continuously monitored and if damages to the building ...
M Theorin, K-M Bandh
The case for using borates in termite control in tropical Australia
2011 - IRG/WP 11-30573
A brief historical overview of boron based wood preservatives efficacy against subterranean termite management worldwide, and in Australia, is presented. The boron based compounds to be used in H2 hazard conditions, may be applied as a surface treatment by dip, flood coat or spray, and rapidly penetrates to the centre of timber substrates, whether containing sapwood or heartwood. However, section ...
B M Ahmed (Shiday), J R J French
Effectiveness of Water Based Bentonite-Borate Slurry for In-situ Remedial Protection of Historic Wooden Piles: The Eurobor Protocol, Part 2
2011 - IRG/WP 11-30574
The study of the biocide product Eurobor®, water mixture of boric acid, borax and sodium bentonite, aimed to verify previous findings regarding borates penetration from a clay-water mixture of foundation timber. The product was applied on samples from 100 year old timber foundation from the city of Göteborg. Although in ground for this long the timber was in acceptable god condition due to groun...
M. Theorin, K. Fimmerstad, K-M. Bandh
Thermally modified timber (TMT) for decking applications – determination of relevant surface properties
2011 - IRG/WP 11-40544
In recent years thermally modified timber (TMT) entered various market segments. It is used for facades, horticultural equipment, garden furniture, and also for kitchen and bathroom cabinets. However, flooring turned out to be the most important application for TMT, either as interior parquet or as exterior decking. Besides durability and dimensional stability, which had been the initial target pr...
L Meyer, C Brischke, C R Welzbacher
Implementation of a Quality Assurance System for thermally modified timber (TMT) by the Association of Central European TMT-Producers
2011 - IRG/WP 11-40558
Due to increasing market shares of thermally modified timber (TMT) in Europe, a working group of ten central European TMT manufacturers (TMT-WG) was founded in 2010 to cover public relations and marketing activities. Since the present level of product testing and property declaration was not satisfying, a “task group TMT-quality” was put into action in 2010 to develop a comprehensive quality a...
C R Welzbacher, W Scheiding
Durability of modified wood in UC3 and UC4. Results from lab tests and 5 years testing in 3 fields
2011 - IRG/WP 11-40562
In 2005 an extensive test program including field tests was set up in order to obtain more data on the durability and long term performance of modified wood and semi-durable wood species. One of the main challenges for modified wood is to predict accurate service life time in UC3 (use class 3, above ground) and UC4 (use class 4, in soil or fresh water contact). So far, data from in-service condi...
M Westin, G Alfredsen
Limited variability in biological durability of thermally modified timber using vacuum based technology
2011 - IRG/WP 11-40567
The SmartHeat® thermal timber treatment is a new technology based on the process parameters being steered very precisely mainly due to the vacuum applied and heating system involved. Timber treated with this technology shows a potential for less variability of biological durability in one batch. Several batch treatments were sampled and assessed on statistical variability of decay resistance agai...
J Van Acker, S Michon, J Van den Bulcke, I De Windt, B Van Swaay, M Stevens
Characterizing long term leaching behaviour of copper from preservative treated wood in a practical exposure scenario
2011 - IRG/WP 11-50278
To investigate the prediction of the long term emission of copper from preservative treated wood in a Use Class Class 3 scenario, treated boards were exposed vertically above ground to natural weather conditions. The study included two products; an amine copper ACQ-type formulation, air-dried after treatment to a 22 kg/m3 retention, and the same formulation which was hot oil vacuum dried after tre...
T Mark Venås, M Klamer
Re-use of casting timber
2011 - IRG/WP 11-50283
Re-use of casting timber could be a way of saving timber resources, particularly in countries where most timber for construction purposes has to be imported. The objective of the present study was to investigate residual concrete on casting timber re-used five times. Moulds were made of sections of Norway spruce, untreated and treated with a casting oil and a wax formulation applied by a vacuum-pr...
I Johansson, S Breyne, H Egnell, J Jermer
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 exposure are presented. To date, Paulownia tomentosa (PAW) and southern yellow pine (SYP) are least durable and cedars are the most durable i...
G T Kirker, A B Blodgett, S T Lebow, C A Clausen
Preliminary laboratory and field evaluation on the performance of Rubbermite as a graded physical barrier against subterranean termite species in Australia
2012 - IRG/WP 12-10766
This paper describes the performance of Rubbermite as a potential graded particle barrier against two subterranean termite species of Coptotermes in laboratory and field test. The results of these bioassays suggest that Rubbermite is a viable control option against Coptotermes species in Australia, particularly against Coptotermes acinaciformis (Froggatt) and Coptotermes lacteus (Froggatt). Rubber...
B M Ahmed (Shiday), J R J French