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An accelerated decay test of needle- and conventionally-incised CCA-treated white spruce and lodgepole pine

https://library.fpinnovations.ca/fr/permalink/fpipub4398
Auteur
Ingram, Janet K.
Morris, Paul I.
Date
June 1998
Édition
41176
Genre du document
Research report
Domaine
Sustainable Construction
Auteur
Ingram, Janet K.
Morris, Paul I.
Date
June 1998
Édition
41176
Genre du document
Research report
Description physique
5 p.
Secteur
Wood Products
Domaine
Sustainable Construction
Champ de recherche
Advanced Wood Materials
Sujet
Preservatives chromated copper arsenate CCA
Preservatives
Preservation
Pinus contorta
Pinus
Picea
Série
W-1510
Localisation
Vancouver, British Columbia
Langue
English
Résumé
An accelerated decay test was set up to compare the performance of CCA-treated needle-incised white spruce and lodgepole pine heartwood with end-matched conventionally-incised material. Short lengths of 2 x 4 and comparable untreated material were installed in a warmed soil bed in the open air. After 12 years of accelerated exposure (equivalent to 15 years' natural exposure), all the treated material - spruce and lodgepole pine, needle and conventionally incised - was almost completely sound with minor patches of surface decay. In contrast, both the untreated spruce and the untreated lodgepole pine heartwood had failed due to decay. The performance of needle-incised and conventionally-incised lumber has been very similar in both species.
Preservation - Incising - Tests
Picea - Preservation
Pinus contorta Dougl. var. latifolia - Preservation
Preservatives - Chromated copper arsenate (CCA)
Documents
Moins de détails

Automated wood failure evaluation technology transfer

https://library.fpinnovations.ca/fr/permalink/fpipub1075
Auteur
Andersen, Axel W.
Date
April 1998
Édition
37478
Genre du document
Research report
Domaine
Wood Manufacturing & Digitalization
Auteur
Andersen, Axel W.
Date
April 1998
Édition
37478
Genre du document
Research report
Description physique
47 p.
Secteur
Wood Products
Domaine
Wood Manufacturing & Digitalization
Champ de recherche
Advanced Wood Manufacturing
Sujet
Transfer
Testing
Plywood
Instrumentation
Gluing
Série
W-1514
Localisation
Vancouver, British Columbia
Langue
English
Résumé
Wood failure evaluation is the key criterion for predicting the long-term durability of plywood. At present, the conventional visual method for plywood wood failure evaluation is slow and subjective. Evaluations can be influenced by factors such as: room lighting, wood species, sample treatment, and readings from prior samples. An automated wood failure evaluation system using image analysis techniques could potentially be programmed to consider all the variables and respond with consistent wood failure values regardless of the machine operator's experience level. This report describes the results of a six-month study in which a system for automated plywood wood failure determination was compared with conventional visual wood failure evaluation. It was built upon research undertaken in the 1996/97 year in which the feasibility of the approach was initially established. In the research reported previously, a colour optical imaging system was assembled and suitable wood failure algorithms were compiled with promising results. The imaging system was 100 % effective in reproducing sample values. The data were discussed with the project liaisons and a three-month comparison with Canply readings was suggested. In this study, machine evaluation of 4,150 samples was compared with readings of monthly plywood mill quality control samples. The sampling was designed to include all British Columbia plywood mills and all categories of commercial plywood production. The differences in average values for wood failure between human and machine evaluation were found to be less than plus or minus 5% in the majority of cases. In addition, 93 % of ‘set average' readings fell in the plus or minus 10% range of deviation expected of human wood failure readers. Agreement on readings of individual samples within each set was not quite as good with 72% falling in the plus or minus 15% range.
Technology transfer
Plywood - Gluing - Tests
Plywood - Tests - Control instruments
Instruments, Testing
Documents
Moins de détails

Basic wood properties of second-growth western hemlock

https://library.fpinnovations.ca/fr/permalink/fpipub5879
Auteur
Jozsa, Les A.
Munro, B.D.
Gordon, J.R.
Date
March 1998
Édition
41165
Genre du document
Research report
Domaine
Sustainable Construction
Auteur
Jozsa, Les A.
Munro, B.D.
Gordon, J.R.
Date
March 1998
Édition
41165
Genre du document
Research report
Description physique
51 p.
Secteur
Wood Products
Domaine
Sustainable Construction
Champ de recherche
Advanced Wood Materials
Sujet
Tsuga Heterophylla
Tsuga
Second growth
Quality control
Qualitative analysis
Physical properties
Growth
Série
Special Publication ; SP-38
W-1444
Localisation
Victoria, British Columbia
Langue
English
Résumé
This report describes some of the background and results of work done to date on second-growth western hemlock basic wood properties at Forintek Canada Corp. The B.C. Ministry of Forests (BCMOF) Research Branch, UBC Forestry Faculty and PAPRICAN were the other cooperating agencies on this project and they investigated live crown/tree growth relationships, strength properties of small clears, and pulping properties, respectively. Properties that were assessed by Forintek, both within and between trees include: relative density of wood, shrinkage, moisture content and relative proportion of heartwood-sapwood, bark thickness, content and distribution of compression wood, incidence and degree of spiral grain, incidence and severity of brown stain, and strength properties of small cleear bending samples. Naturally grown 90-year-old western hemlock stands represent much of the emerging timber supply in the B.C. coastal forest region. Information characterizing the commercial quality of this resource is needed now to support processing and marketing decisions and for product promotion. In addition, the BCMOF and industry members are making stand management decisions today which will determine the future quality of western hemlock. We can reduce the risk of making wrong investment decisions by providing information on how different growing conditions (e.g., biogeoclimatic zone, site, stand density, thinning) affect second-growth wood quality.
Second growth
Tsuga heterophylla - Physical properties
Growth - Influence on quality
Documents
Moins de détails

Caractérisations chimique et biologique de sections de poteaux de bois traité présentant des signes de pourriture prématurée

https://library.fpinnovations.ca/fr/permalink/fpipub5943
Auteur
Besner, A.
Labrecque, J.-F.
Gignac, Manon
Rossignol, L.
Date
March 1998
Édition
41861
Genre du document
Research report
Domaine
Sustainable Construction
Auteur
Besner, A.
Labrecque, J.-F.
Gignac, Manon
Rossignol, L.
Date
March 1998
Édition
41861
Genre du document
Research report
Description physique
24 p.
Secteur
Wood Products
Domaine
Sustainable Construction
Champ de recherche
Advanced Wood Materials
Sujet
Wood
Wood decay
Treatment
Poles
Série
Rapport IREQ-98-001
E-3179
Localisation
Varennes, Québec
Langue
French
Résumé
Treated Wood
Poles
Decay
Documents
Moins de détails

Debarking efficiency (winter/summer)

https://library.fpinnovations.ca/fr/permalink/fpipub41901
Auteur
Laganière, B.
Date
June 1998
Genre du document
Research report
Domaine
Wood Manufacturing & Digitalization
Auteur
Laganière, B.
Date
June 1998
Genre du document
Research report
Description physique
42 p.
Secteur
Wood Products
Domaine
Wood Manufacturing & Digitalization
Champ de recherche
Advanced Wood Manufacturing
Sujet
Bark
Saw mills
Série
1661
E-3320
Localisation
Sainte-Foy, Québec
Langue
English
Résumé
Debarking
Documents
Moins de détails

Decay of wood in buildings : a compilation of articles

https://library.fpinnovations.ca/fr/permalink/fpipub41173
Auteur
Morris, Paul I.
Date
March 1998
Genre du document
Research report
Domaine
Sustainable Construction
Auteur
Morris, Paul I.
Collaborateur
Canada. Canadian Forest Service.
Date
March 1998
Genre du document
Research report
Description physique
1 v.
Secteur
Wood Products
Domaine
Sustainable Construction
Champ de recherche
Advanced Wood Materials
Sujet
Termites
Wood decay
Prevention
Preservation
Insects
Growth
Design
Building construction
Série
Canadian Forest Service No. 19;1052
W-1506
Localisation
Vancouver, British Columbia
Langue
English
Résumé
The first paper, Understanding Biodeterioration of Wood in Structures, provides an overview of the subject matter and refers to a selection of textbooks for more detail. It provides some essential background on wood structure and composition, the range of wood-inhabiting organisms and their effects on wood. The colonisation sequence, the conditions required for decay, and the rates of growth and strength loss are covered in some detail. The second paper, Moisture Problems in Vancouver Condominiums reviews the background to the recent epidemic of decay problems in southwestern B.C. and Forintek's short-, medium- and long-term response. In the short term, Forintek has been assisting in the work of the Building Envelope Research Consortium (BERC) designed to understand and deal with these problems. In the medium term, we have developed a combination of safe low-level chemical treatments which will provide OSB with the same fungal resistance as Douglas-fir faced plywood. This paper also describes the long-term project Decision Aids for Durable Wood Construction.
Moisture - Control
Moisture - Prevention
Buildings - Houses - Moisture content
Decay - Prevention
Building construction - Design
Preservation
Moulds
Termites
Insects
Fungi - Growth
Marine borers
Documents
Moins de détails

Development of bark board products

https://library.fpinnovations.ca/fr/permalink/fpipub37476
Auteur
Troughton, G.E.
Gaston, Chris
Date
June 1998
Genre du document
Research report
Domaine
Wood Manufacturing & Digitalization
Auteur
Troughton, G.E.
Gaston, Chris
Date
June 1998
Genre du document
Research report
Description physique
12 p.
Secteur
Wood Products
Domaine
Wood Manufacturing & Digitalization
Champ de recherche
Advanced Wood Manufacturing
Sujet
Utilization
Bark
Série
W-1508
Localisation
Vancouver, British Columbia
Langue
English
Résumé
The effects of different pressing variables were evaluated for the manufacture of hog fuel board made from western hemlock. In general, the hog fuel boards made at higher temperature and pressure exhibited better dimensional stability and durability properties. Pressing time was reduced with temperature ranging from 20 min at 260 C to 4 min at 315 C. It was demonstrated that good quality hog fuel boards could be produced using a high wood content of 65%. In all cases, the western hemlock hog fuel boards showed an average thickness swelling less than 10% after a 2-hour boil test. After the same treatment, OSB shows 50% thickness swelling and particleboard disintegrates. Preliminary results for bark / hog fuel boards made from three eastern species, white spruce, balsam fir and jack pine showed the boards exhibited excellent dimensional stability and durability properties. In the interests of furthering the preliminary market and economic feasibility investigations of bark board and in co-operation with Dr. A. Kozak and his 4th year marketing class (Dept. of Wood Science, UBC), exploratory analyses were done on four potential end uses. These were flooring, floor underlayment, roof shingles and furniture / cabinets.
Board products - Manufacture
Bark - Utilization
Documents
Moins de détails

Dispositif de lecture et d'affichage

https://library.fpinnovations.ca/fr/permalink/fpipub41912
Auteur
Grondin, F.
Date
February 1998
Genre du document
Research report
Domaine
Wood Manufacturing & Digitalization
Auteur
Grondin, F.
Date
February 1998
Genre du document
Research report
Description physique
19 p.
Secteur
Wood Products
Domaine
Wood Manufacturing & Digitalization
Champ de recherche
Advanced Wood Manufacturing
Sujet
Simulation
Saw mills
Sawing
Localisation
Sainte-Foy, Québec
Langue
French
Résumé
Curve sawing
Sawmill Simulation
Documents
Moins de détails

Effects of environmental factors on spore germination and mycelial growth

https://library.fpinnovations.ca/fr/permalink/fpipub41920
Auteur
Gignac, Manon
Date
March 1998
Genre du document
Research report
Domaine
Sustainable Construction
Auteur
Gignac, Manon
Collaborateur
Canada. Canadian Forest Service
Date
March 1998
Genre du document
Research report
Description physique
2 p.
Secteur
Wood Products
Domaine
Sustainable Construction
Champ de recherche
Advanced Wood Materials
Sujet
Stain
Wood decay
Série
CFS Simple Progress Report
E-3020
Localisation
Sainte-Foy, Québec
Langue
English
Résumé
Stain - Mold - Decay
Fungi
Documents
Moins de détails

Electrostatic application of powdered PF resin to OSB furnish

https://library.fpinnovations.ca/fr/permalink/fpipub37475
Auteur
Groves, C. Kevin
Date
April 1998
Genre du document
Research report
Domaine
Wood Manufacturing & Digitalization
Auteur
Groves, C. Kevin
Date
April 1998
Genre du document
Research report
Description physique
17 p.
Secteur
Wood Products
Domaine
Wood Manufacturing & Digitalization
Champ de recherche
Advanced Wood Manufacturing
Sujet
Strandboards
Spraying
Oriented strandboard
Orientation
Gluing
Série
W-1504
Localisation
Vancouver, British Columbia
Langue
English
Résumé
Research was carried-out to investigate the feasibility of electrostatically applying PF powder resin to OSB furnish to improve resin distribution and thereby improve panel properties. Research elsewhere has shown that resin distribution is an important factor affecting panel properties including internal bond strength and thickness swell. It was theorized that electrostatic charging would distribute resin more uniformly on strands compared to conventional application techniques and would help to strengthen the bond between resin and strands thereby minimizing resin losses and allowing for greater levels of resin to be retained on OSB furnish. Small-scale tests were conducted in Forintek's Vancouver laboratory followed by pilot plant tests at the Alberta Research Council (ARC) which involved electrostatically charging resin and aspen furnish in a pilot plant blender. Lab results showed that the average amount of resin retained by strands (retention) increased with electrostatic application compared to control applications. During pilot plant tests, image analysis results showed that resin coverage increased using electrostatics. Also, the coefficient of variation in resin coverage was lower for electrostatic applications compared to the controls. However, contrary to previous research findings, test panels made from electrostatic and control batches in a pilot plant did not show any significant differences in internal bond and thickness swell properties. Electrostatic application of powdered PF resin does not appear to sufficiently improve resin distribution in aspen to affect panel properties. Although pilot plant results were not promising, lab tests have shown that electrostatic application techniques are sensitive to material properties and that other wood species may be more suitable for charging than aspen. Further research will be continued at Forintek's eastern lab in the 1998/99 year to investigate electrostatic application of resins to mixed hardwood species.
Spraying
Oriented strandboard - Gluing - Tests
Gluing - Processes
Documents
Moins de détails

70 notices – page 1 of 7.