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Dynamic properties of tall mass timber buildings under wind-induced vibration

https://library.fpinnovations.ca/en/permalink/fpipub53027
Author
Cuerrier-Auclair, Samuel
Date
April 2016
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Cuerrier-Auclair, Samuel
Contributor
Forestry Innovation Investment
Date
April 2016
Material Type
Research report
Physical Description
2 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Structural composites
Wood
Laminate product
Veneer
Floors
Series Number
E-4960
Location
Québec, Québec
Language
English
Abstract
FPInnovations launched a multi-year research project to measure mid- to high-rise wood buildings’ natural frequencies and damping ratios to expand the database and validate or adapt the existing equations to estimate the natural frequencies. Two high-rise wood buildings equipped with an anemometer and accelerometers are also being constantly monitored to study how the wind excites the building.
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InfoNote2020N7E.pdf

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Multi-modal approach to kiln drying of BC coastal lumber products

https://library.fpinnovations.ca/en/permalink/fpipub52669
Author
Oliveira, Luiz C.
Lazarescu, Ciprian
Date
June 2016
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Oliveira, Luiz C.
Lazarescu, Ciprian
Contributor
BC Coastal Forest Industry
Date
June 2016
Material Type
Research report
Physical Description
31 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Drying
Lumber
Kilns
Productivity
Costs
Location
Vancouver, British Columbia
Language
English
Abstract
BC Coastal mills will need to diversify the drying technologies currently used and consider new approaches in order to improve productivity, reduce drying costs, regain competiveness and continue to play a significant role in the increasingly stringent quality market for forest products. New demands for drying are related to energy efficiency, low environmental impact and of course, quality of the final product. The specific objectives of the project were: (1) to improve the conventional drying of 4.5” x 4.5” Douglas-fir lumber, (2) to evaluate the superheated steam/vacuum (SS/V) drying of 4.5” x 4.5” Douglas-fir lumber, (3) to develop a green sorting strategy for hem-fir lumber and (4) to determine the time required to reach 56°C in the core of 5¼ x 5¼ lumber using the requirements of CFIA PI-07 Heat Treatment schedule Option D - Generic Phytosanitary Heat Treatment Schedule, Heat Treatment with Moisture Reduction. The results showed that the drying time in conventional drying of 4.5” x 4.5” Douglas-fir lumber can be reduced by up to 25% without compromising the quality of the lumber. This can be achieved by increasing the temperature in the final drying stages and using lower relative humidity at the beginning of the drying process. In addition, final moisture content (MC) variation was reduced from 6.2% to 3.9%. Reductions of drying times from 26% to 41% were observed when drying 4.5” x 4.5” Douglas-fir under SS/V drying. Quality of the lumber at the end of drying was better when compared to the quality of the lumber at the end of conventional drying. In addition, specimens exhibited less final MC variation. Based on drying rate measurements of green hem-fir lumber dried to 9.0% MC, a new database was developed which in turn was incorporated into OASiS 2.0 software to evaluate different pre-sorting scenarios. Pre-sorting simulations allow end users to estimate the impact of kiln productivity, final MC distribution and drying degrade. The results showed that different correlations between the time to reach 19.0% MC and initial weight or initial MC could be established. The best correlation with an R square of 0.77 was made between initial weight and MC. After performing several simulations with the new database an optimum cut-off point of 65% yielded the best results in terms of potential increase of productivity and quality of the final product. Wood heating rate test results showed that CFIA Option D may be extended for 5¼ x 5¼ lumber as long as the dry-bulb = 71°C (= 160°F) for 36 hours at the end of the heat treatment. Total heat treatment time required, including the time required to reach 71°C (160°F), is 72 hours.
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Fire-resistance of timber-concrete composite floor using laminated veneer lumber

https://library.fpinnovations.ca/en/permalink/fpipub40133
Author
Ranger, Lindsay
Dagenais, Christian
Cuerrier-Auclair, Samuel
Date
April 2016
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Ranger, Lindsay
Dagenais, Christian
Cuerrier-Auclair, Samuel
Contributor
Forestry Innovation Investment
Date
April 2016
Material Type
Research report
Physical Description
28 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Fire
Resistance
Structural composites
Wood
Concrete
Laminate product
Veneer
Floors
Series Number
E-4960
Location
Québec, Québec
Language
English
Abstract
There is a need to demonstrate how novel timber-concrete composite floors can span long distances and be a practical alternative to other traditional structural systems. Better understanding of the fire behaviour of these hybrid systems is essential. To achieve this, the fire-resistance of a timber-concrete composite floor assembly, using BC wood products, will be evaluated in accordance with CAN/ULC-S101 [2]. A 2 hr fire resistance rating will be targeted, as this is the current requirement in high-rise buildings for floor separations between occupancies. The structural behaviour of this type of system will also be assessed from conducting pull-out tests of the shear connectors. In conjunction with previous test data, the results of this test will be used to develop an analytical model to assess the structural and fire-resistance of timber-concrete composite floors. 301010618
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Le contrôle des moisissures avant et après séchage

https://library.fpinnovations.ca/en/permalink/fpipub49652
Author
Gignac, Manon
Date
2016
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Gignac, Manon
Date
2016
Material Type
Research report
Physical Description
36 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Fungi
Wood
Wood fungi
Forestry
Drying
Prevention
Location
Québec, Québec
Language
French
Abstract
Pour différentes raisons, les moisissures représentent un défi constant lors de la production de bois résineux et feuillus : santé, environnement, qualité et stratégies de production. Elles sont aussi une préoccupation constante pour les consommateurs et à l’origine de réclamations qui peuvent être très coûteuses pour les producteurs. Un sondage en 2014 dans l’Est du Canada révélait qu’en moyenne les coûts annuels liés à la détérioration biologique étaient de 60 000 $ par usine. Dans le cas d’une usine intégrée, spécialisée en transformation primaire et secondaire de feuillus et résineux, ces coûts avaient atteint près de 475 000 $ pour cette même année. Ces coûts sont liés à un ensemble de facteurs : modification du procédé, perte de productivité, réclamations, pertes de ventes (Gignac, 2015). Plusieurs facteurs peuvent contribuer au développement de moisissures dont la teneur en humidité du bois, les conditions climatiques et la durabilité naturelle propre à l’essence de bois. Avec les années, FPInnovations a acquis beaucoup de connaissances, accumulé beaucoup d’information, de données et de savoir-faire à travers ses projets de recherche et son soutien technique à l’industrie. En combinaison avec d’autres données disponibles dans la communauté scientifique, nous proposons de résumer l’information pertinente pour l’industrie et de la présenter sous forme de document de vulgarisation. Ce document se veut un outil simple et pratique pour le personnel de l’industrie de la transformation du bois afin de les soutenir dans la prise de décision concernant les stratégies d’entreposage, de séchage à l’air, séchage au séchoir, gestion du bois sec et transport jusqu’à sa destination finale, le consommateur. Ce document de référence regroupe les connaissances générales en lien avec les problématiques de moisissures.
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Development of bio-modified of chitosan-based adhesives for wood composites

https://library.fpinnovations.ca/en/permalink/fpipub5798
Author
Wang, Xiang-Ming
Yang, D.-Q.
Zhang, Yaolin
Feng, Martin
Huang, Z.
He, G.
Date
February 2016
Edition
40114
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Wang, Xiang-Ming
Yang, D.-Q.
Zhang, Yaolin
Feng, Martin
Huang, Z.
He, G.
Date
February 2016
Edition
40114
Material Type
Research report
Physical Description
36 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Adhesives
Environment
Wood composites
Series Number
Transformative Technologies - Development of "Green" Wood Adhesives for Wood Composite Products
Project no.301006168
E-4956
Location
Québec, Québec
Language
English
Abstract
Chitosan is an amino polysaccharide obtained from the deacetylation of chitin, which is naturally occurring in the shells of a large number of marine crustaceans. Chitosan is soluble in weakly acidic aqueous solutions and possesses adhesive properties. Chitosan has received much attention for medical and industrial applications; however, only limited studies have been conducted on the application of chitosan as a wood adhesive, because its bonding properties on wood are poor. To improve the adhesive quality of chitosan resin, an innovative study on chitosan adhesives has been conducted to use selected fungal species to modify chitosan and improve its bonding properties, to synthesize non-formaldehyde resins with the fungus-modified chitosan, and to enhance urea-formaldehyde (UF) and phenol-formaldehyde (PF) resin performance with the fungus-modified chitosan. The bonding properties of wood composites made with these chitosan-based green wood adhesives were significantly improved, in terms of lap-shear strength. Unmodified chitosan solution was not compatible with ammonium lignosulfonate, liquid PF resin, soybean resin, powder PF resin, or soybean flour, but was compatible with UF resin, polyvinyl acetate (PVA) resin, and phenol. With the addition of chitosan in UF and PVA resins, both the dry and wet shear strengths of plywood panels were improved, compared with those of panels bonded with the control UF and PVA resins, i.e. without chitosan. A number of chitosan and chitosan-reinforced UF resins were prepared as a binder for particleboard panel manufacturing. Six (6) types of particleboard panels with different levels of resin loadings and press conditions were manufactured. The resulting boards were tested to evaluate the bond quality of the chitosan and chitosan-reinforced UF resins. The test results showed that particleboard panels with good visual quality could be produced with all formulations of chitosan-UF adhesives, even with resin systems made with 1% of chitosan resin only. All chitosan resins used alone or added to UF resins yielded panels with better internal bond (IB) strength than those made with the UF control resin. The panels made with 1% chitosan resin plus 66% UF resin in a 1:1 ratio yielded panels with the highest IB strength and the best overall mechanical properties.
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Évaluation de nouvelles approches pour réduire la courbure des rangs du haut des chargements de séchoirs

https://library.fpinnovations.ca/en/permalink/fpipub5808
Author
Savard, Marc
Gignac, Manon
Labrecque, Guy
Date
March 2016
Edition
40213
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Savard, Marc
Gignac, Manon
Labrecque, Guy
Date
March 2016
Edition
40213
Material Type
Research report
Physical Description
16 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Lumber drying
Kilns
Lumber defects
Series Number
301010408
E-4978
Location
Québec, Québec
Language
French
Abstract
Des pièces de bois sont régulièrement rejetées à l’entrée de la raboteuse en raison de courbures excessives. Elles proviennent en majorité des rangs du haut des chargements de séchoirs. À cet endroit, les pièces ne sont pas contraintes, et les conditions de séchage sont souvent plus sévères. Dans une étude antérieure de Forintek Canada Corp., Garrahan (1997) a démontré l’impact du poids de chacune des rangées sur le déclassement du bois en fonction de la hauteur du chargement. La figure 1 montre que les pertes en valeur diminuent du haut du chargement jusqu’au bas. Le poids exercé par les rangées supérieures est de plus en plus important et permet de contraindre le bois en place en cours de séchage.
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Développement d'un prototype industriel de reséchage par haute fréquence en continu

https://library.fpinnovations.ca/en/permalink/fpipub5818
Author
Lavoie, Vincent
Tanguay, F.
Kendall, J.
Date
April 2016
Edition
40274
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Lavoie, Vincent
Tanguay, F.
Kendall, J.
Date
April 2016
Edition
40274
Material Type
Research report
Physical Description
23 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Drying
Kilns
Seasoning high frequency
Series Number
E-4981
Location
Québec, Québec
Language
French
Abstract
La technologie de séchage par haute fréquence en continu développée par FPInnovations et Hydro-Québec a récemment été démontrée à l’échelle semi-industrielle (précommerciale) (Lavoie et al. 2015). Les essais de séchage ont porté principalement sur des applications de produits à valeur ajoutée. La technologie est viable techniquement et peut répondre à des besoins de séchage de précision pour des applications spécifiques. La technologie a également le potentiel de resécher des pièces demeurées humides (volontairement ou involontairement) lors de la production de bois d’œuvre.
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7 records – page 1 of 1.