Development of CLT products with improved fire performance

https://library.fpinnovations.ca/en/permalink/fpipub7708
Author
He, Guangbo
Feng, Martin
Roussière, Fabrice
Date
March 2020
Edition
52984
Material Type
Research report
Field
Sustainable Construction
Author
He, Guangbo
Feng, Martin
Roussière, Fabrice
Date
March 2020
Edition
52984
Material Type
Research report
Physical Description
17 p.
Sector
Wood Products
Field
Sustainable Construction
Research Area
Advanced Wood Materials
Subject
Fire
Structural composites
Laminate product
Timber
Hardwoods
Testing
Language
English
Abstract
The fire resistance of cross-laminated timber (CLT) could be improved by treating the lamina with fire retardants. The major issues with this technology are the reduced bondability of the treated lamina with commercial adhesives. This study assessed several surface preparation methods that could improve the bondability and bond durability of fire-retardant treated wood  with  two  commercial  adhesives.  Four  surface  preparation  methods,  including  moisture/heat/pressure, surface planing, surface chemical treatment, and surface plasma treatment were assessed for their impact on the bondability and bond durability of lodgepole pine lamina. The block shear test results indicated that all surface preparation methods were somewhat  effective  in  improving  bond  performance  of  fire-retardant  treated  wood  compared to the untreated control wood samples, depending on the types of fire retardants and wood adhesives applied in the treatment process and bonding process. The selection of surface preparation, fire retardant, and wood adhesive should be considered interactively to obtain the best bond properties and fire performance. It may be possible to effectively bond the treated lamina with PUR adhesive without any additional surface preparation for the fire retardant used in the treatment at FPInnovations.
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