Your search resulted in 767 documents. Displaying 25 entries per page.
Assessment of Boracol 200RH (FrameSaver) as a remedial treatment to control decay in pre-decayed model timber frame units
2010 - IRG/WP 10-30529
Model timber frame units constructed from untreated radiata pine were pre-wetted to approximately 40% moisture content and inoculated with Coniophora puteana and Oligoporus placenta. Units were transferred to a controlled environment room maintained at 25°C and 95% RH for 7 and 10 weeks to allow two levels of decay to become established in units. Following pre-decay, units were disassembled, clea...
Mick Hedley, Dave Page, Jackie van der Waals
Evaluation of ACQ-D treated Chinese fir and Mongolian Scots pine with different post-treatments after 20 months of exposure
2010 - IRG/WP 10-30530
The performance of alkaline copper quat-type D (ACQ-D) treated Chinese fir (Cunninghamia lanceolata Hook.) and Mongolian Scots pine (Pinus sylvestris Linn. var. mongolica Litv.) stakes after 20 months exposure in Chengdu and Guangzhou of southern China were evaluated according to AWPA standard E07-07. The ACQ-D treatments used two concentration levels (0.5 and 1.0%) and four different post-treatme...
Lili Yu, Jinzhen Cao, Wei Gao, Haitao Su
Mobility of Copper from MCQ in Shell-Treated Wood Exposed Above Ground
2010 - IRG/WP 10-30534
Most Canadian treated decking in service has been given just a thin shell of preservative treatment 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 effecti...
R Stirling, P I Morris
Treatment of Scots pine wood with oil in water and water in oil emulsion systems: Effects on boron leaching and water absorption
2010 - IRG/WP 10-30535
The aim of this study was to investigate the water absorption and water repellent efficiency of oils and oil water emulsions [oil-in-water (O/W) and water-in-oil (W/O)] and possibilities of reducing the amount of boron leaching from treated wood. Scots pine wood samples treated with waste or sunflower oil and water formulations contained 3%BA. The level of water absorption and water repellent effi...
E D Tomak, Ü C Yildiz, A Can
Distribution and availability of preservative components in ACQ treated wood - effects of coatings and weathering
2010 - IRG/WP 10-30537
Copper and quaternary ammonium compound (quat) distributions across lumber (gradients) and availability, as measured by amount removed by intensive leaching of wood flour, were measured in ACQ treated southern pine lumber. Samples were evaluated just after treatment and stabilization, or after 3 years of laboratory storage, or after 3 years of natural weathering exposure. The objective was to in...
T Ung, M Nejad, P Cooper
A Comparison of the Performance of Related Copper Based Preservatives against Soft Rot
2010 - IRG/WP 10-30540
The performance of pine and beech wood treated with either a soluble copper + quat (ACQ type D) preservative system or a particulate copper + quat system was evaluated in unsterile soil using the European standard ENV 807 soft rot decay test procedure.
In addition, to compare soft rot performance of soluble and particulate copper directly without the influence of co-biocides, beech and pine test...
M Ray, D Dickinson, K Archer
The Effects of Natural Weathering on the Properties of Heat Treated Alder Wood
2010 - IRG/WP 10-40484
Heat treatment is an effective method to improve the dimensional stability and biological durability of wood. The heat treatment technology and the heat treated wood products were recently introduced to Turkey. However, only a few studies have been reported on the effect of natural weathering on the properties of heat treated wood in both Turkey and the world. In this study, heat treated alder (Al...
S Yildiz, Ü C Yildiz, E D Tomak
Extruded wood plastic composites based on ACQ and MCQ-treated wood materials
2010 - IRG/WP 10-40495
This paper deals with wood plastic composites manufactured using ACQ and MCQ-treated wood fibers recovered from a wood treatment plant. The goal was to investigate the effect of coupling treatments on the properties of manufactured wood plastic composites (WPCs) through injection molding and to manufacture co-extruded WPC with treated wood fibers. The result demonstrated sound mechanical propertie...
Qinglin Wu, Fei Yao, K Ragon, J Curole, M Voitier, T Shupe
Development of markers to predict decay durability of heat treated wood
2010 - IRG/WP 10-40496
Effect of heat treatment temperature on elemental composition of Scots pine sapwood (Pinus sylvestris) has been investigated in the range of temperatures between 220 and 250°C. Results revealed an important increase of carbon content, while oxygen content significantly decreases. Independently of the heat treatment temperature, elemental composition is strongly correlated with the mass losses due...
Ž Šušteršic, A Mohareb, M Chaouch, M Pétrissans, M Petric, P Gérardin
TMT–Interlab–Test to establish suitable quality control techniques - Structure and first results
2010 - IRG/WP 10-40503
As a result of growing quality demands from manufacturers and end-consumers of thermally modified timber (TMT) recent scientific research activities are increasingly focussed on modification mechanisms and by this on the development of suitable quality control methods. To deepen the knowledge in modification mechanisms and to obtain a larger variety of scientific data for TMT depending on the trea...
C R Welzbacher
Influence of Copper Preservative Type on Earlywood and Latewood Distribution of Copper in Treated Wood
2010 - IRG/WP 10-40507
Some of the new water based copper containing wood preservative systems use particulate “micronized” copper as the primary biocide instead of the more traditional soluble amine copper based systems. Studies were conducted to investigate how this difference in the type of copper system might impact both initial and post drying distribution of the preservatives in wood. Of specific interest wa...
A Zahora
Durability of heat treated Malaysian bamboo Gigantochloa scortechinii strips
2010 - IRG/WP 10-40514
Bamboo is one of the fastest growing plants and can be used for various products. In tropical countries such as Malaysia bamboo is abundantly available at reasonable prices, therefore it is used for numerous purposes. However, bamboo (as a lignocellulosic material) is susceptible to fungal and insect attack and it is difficult to protect by preservative treatment. Heat treatment is an option to im...
N Kamarudin, K Sugiyanto
A comparison of the corrosion of alkaline copper and micronized copper treated wood
2010 - IRG/WP 10-40515
With the replacement of chromate copper arsenate (CCA) by alkaline copper wood preservatives, there have been reports of increasing corrosion of metal fasteners and connectors in contact with treated wood. This may be explained by the presence of more mobile copper in the treated wood. One novel industrial response has been to develop a wood preservative based on an aqueous solution containing sus...
M Kofoed, J N R Ruddick
Effect of borax-boric acid Treatment of simul (Bombax ceiba) Veneers on Glue-Bond Quality of Plywood
2010 - IRG/WP 10-40525
The glue-bond quality of plywood made of treated simul (Bombax ceiba) veneers was investigated. The veneers were treated with cold and hot water solution of borax-boric acid (BB) of different concentrations and treatment durations. The plywoods were made at three different pressures in hot press using urea formaldehyde glue. The glue-bond strength of untreated plywood in dry shear-test was found t...
K Akhter, Md Abul Hashem, S Akhter
Preservative Treatment of simul (Bombax ceiba) Veneers with Hot and Cold Water Solution of borax-boric acid by Soaking Process
2010 - IRG/WP 10-40528
Veneers of simul (Bombax ceiba) were treated with different concentrations of water- borne preservatives borax-boric acid (BB) by soaking process for different time periods. In the case of hot water treatment, it was found that the average retention of preservative chemicals increased gradually with the increasing treatment period from 20 minutes to 60 minutes. Similar trend was observed in the ca...
K Akhter, Md Abul Hashem, S Akhter
Effect of Nano-Silver Treatment on Densified Wood Properties. Part One: Swelling, Recovery Set, Bending Strength
2010 - IRG/WP 10-40533
In this research the effect of Nano-Silver treatment on compressed wood properties, was studied. Wood specimens were cut from Popolus alba (poplar) and impregnated with Nano-Silver and water. Then the saturated samples were compressed through radial direction in a hot press under pressure of 6 MPa, for 1 and 4 hours. The temperatures of press were 150°C and 175°C. Swelling (24h), recovery set ...
G Rassam, H Reza Taghiyari, B Jamnani, M Ali Khaje
Deterioration of wooden heritage in outdoor exposure in Romania
2010 - IRG/WP 10-40535
The paper contains a study of the deterioration of wooden heritage in Romania, in outdoor exposure.
Romania belongs to the few countries having a rich heritage of this kind. A quantitative image of
this heritage reveals the 1,350 objectives transferred and reconstructed in 16 open-air museums, over
1,500 wooden churches, more than 4,000 buildings and technical facilities, historical monuments
...
L Bucşa, C Bucşa
Comparative Study of Heat Treatment of Beech Wood in Hot Water and Steam Medium
2010 - IRG/WP 10-40536
Heat treatment of wood is an effective method to improve the dimensional stability and durability against biodegradation. Heat treatments of beech wood in 2 different mediums (hot water and steam) in 180ºC were compared in physical, mechanical and anatomical properties. Mass loss in hydrothermally treated wood was higher than hygrothermally treated samples. Mechanical properties (MOR, MOE and CS)...
A Talaei, K Yaghoobi, A N Karimi
Combined Effect of Boric Acid and Waste Oil Treatment on Boron Leaching
2010 - IRG/WP 10-50268
In this study it was aimed to investigate the boron leaching amounts in Scots pine wood samples treated with boric acid (BA) and waste oil (WO) alone or by dual treatment. The level of water absorption and water repellent efficiency were determined with cyclical wetting tests, total of 336 hours. Wood samples that have both covered and uncovered transversal section were impregnated with 3% boric a...
Ü C Yildiz, E Dizman
Chapter 7 - Treatment processes of bamboo
2010 - IRG/WP 07-10635-07
For adequate penetration and retention of preservatives in woody
bamboos at green, dry, solid and sliced conditions different possible
and applied treatment processes have been described along with
their classifications. The treated bamboo can be used as building
materials; the sufficient treatability ensures its long-term best
utilization at ground contact and indoor. All the processes descr...
A K Lahiry
Chapter 11 - Preservation of talla bamboo
2007 - IRG/WP 07-10635-11
Researches revealed that the talla bamboo (Bambusa tulda Roxb.))
in Bangladesh could be full-cell pressure treated with CCA in green
and dry conditions. The dry bamboo gives higher loading
absorptions than green one when impregnated at same treating
conditions. Also higher absorptions are obtained at nodes rather
than internodes. Adequate penetration and retention results for
ground and wate...
A K Lahiry
Chapter 12 - Treatment Groups of Bamboo
2007 - IRG/WP 07-10635-12
Study on distribution of CCA in three major bamboo species in
Bangladesh, full-cell pressure treated at green and dry conditions
revealed two treatment groups and some treating principles. Higher
adequate treatment for ground and water contact use is only
possible by treating problematic bamboo species pre-kiln dried up to
half of its FSP and non-problematic species pre-dried up to FSP
(20% ...
A K Lahiry
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
A comparative study and evaluation of methodologies used for determining wood preservative penetration
2011 - IRG/WP 11-20475
A series of methods for determining penetration of wood preservatives into the wood structure have been developed for either quality control (QC) or research and development purposes. QC methods range from monitoring the solution uptake, applying colour indicators or sampling specific wood samples followed by wood acid digestion/atomic absorption spectroscopy (AAS) or solvent extraction/chromatogr...
R Craciun, R Moeller, J Wittenzellner, T Jakob, J Habicht
LOSP for glulam, when should the treatment be applied?
2011 - IRG/WP 11-30555
Treatment options for outdoor above-ground (H3) exposed glulam of Pinus radiata and P. elliottii were examined. Beams were treated with azole LOSP (containing a zinc tracer) aiming for retentions of 35-40 l/m3 or 70-80 l/m3. Treatment was conducted either before or after gluing. TBTN LOSP and CCA were included as comparative treatments. Test specimens for exposure were cut after treatment, while w...
L J Cookson