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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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