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Performance of Wood Adhesive for Cross Laminated Timber Under Elevated Temperatures

https://research.thinkwood.com/en/permalink/catalogue1831
Year of Publication
2018
Topic
Mechanical Properties
Fire
Material
CLT (Cross-Laminated Timber)
Application
Wood Building Systems
Author
Zelinka, Samuel
Rammer, Douglas
Hasburgh, Laura
Bleche, Nathan
Pei, Shiling
Sullivan, Kenneth
Ottum, Noah
Organization
Forest Products Laboratory
Year of Publication
2018
Format
Conference Paper
Material
CLT (Cross-Laminated Timber)
Application
Wood Building Systems
Topic
Mechanical Properties
Fire
Keywords
Panels
Structural Performance
Fire
Safety
Serviceability
Mechanical Properties
Tensile Strength
Shear Strength
Temperature
Conference
World Conference on Timber Engineering
Research Status
Complete
Notes
August 20-23, 2018 Seoal, Republic of Korea
Summary
The increasing use of cross laminated timber (CLT) panels in large multi-story buildings has highlighted the structural performance of CLT in fire as a critical issue concerning life safety and serviceability. It is well-known that wood material strength decreases when exposed to elevated temperature for an extended period of time. For CLT panels, another level of complexity lies in the mechanical properties of the glued interface under high temperature. In this study, the tensile strength of typical North American wood species and shear strength of the glued interface of commonly used adhesives in CLT production were evaluated at different levels of elevated temperatures. The researchers systematically tested glue interface and wood samples in a controlled temperature chamber and obtained the load-deformation curves of the specimens until failure was observed. A total of five temperature levels were tested, with three wood species and four wood adhesive types. The glued interface strength was also compared to wood material strength itself under different temperatures. For each test, multiple samples were tested to ensure statistical significance of the results. The ultimate objective of this study is to develop a mechanistic model for CLT panels that can take into account the effect of temperature. In this paper, only the design, execution, and results from the elevated temperature tests are presented.
Online Access
Free
Resource Link
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Wood handbook: Wood as an engineering material

https://research.thinkwood.com/en/permalink/catalogue3241
Year of Publication
2021
Topic
General Information
Author
Ross, Robert
Organization
Forest Products Laboratory
Year of Publication
2021
Format
Book/Guide
Topic
General Information
Keywords
Physical Properties
Mechanical Properties
Wood-based Composites
Panel Products
Fastenings
Fire Resistance
Finishing
Decay
Preservation
Heat Sterilization
Sustainable Use
Research Status
Complete
Summary
Summarizes information on wood as an engineering material. Presents properties of wood and wood-based products of particular concern to the architect and engineer. Includes discussion of designing with wood and wood-based products along with some pertinent uses. (1). Wood as a renewable and sustainable resource (2). Characteristics and availability of commercially important woods (3). Structure and function of wood (4). Moisture relations and physical properties of wood (5). Mechanical properties of wood (6). Commercial lumber, round timbers, and ties (7). Stress grades and design properties for lumber, round timber, and ties (8). Fastenings (9). Structural analysis equations (10). Wood adhesives: bond formation and performance (11). Wood-based composite materials: panel products, glued laminated timber, structural composite lumber, and wood–nonwood composites (12). Mechanical properties of wood-based composite materials (13). Drying and control of moisture content and dimensional changes (14). Biodeterioration of wood (15). Wood preservatives (16). Finishing wood (17). Use of wood in buildings and bridges (18). Fire safety of wood construction (19). Specialty treatments (20). Heat sterilization of wood
Online Access
Free
Resource Link
Less detail