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Glueline Integrity in Fire
RISE Research Institutes of Sweden, Safety and Transport, Fire and Safety.ORCID iD: 0000-0002-7663-1525
2021 (English)Report (Other academic)
Abstract [en]

Mass timber is an increasingly popular material for large and tall buildings. Such buildings typically have higher consequence classes than buildings of traditional timber construction and have higher fire resistance requirements. Architectural demands pushing towards having large surface areas of visible and exposed wood lead to additional fire safety challenges. Previous research has shown that some mass timber products can exhibit glue line integrity failure when exposed to fire, while other mass timber products are not prone to this phenomenon. In practice, it is important to know whether glue line integrity failure occurs, to be able to suitably perform fire resistance calculations (for example using the upcoming version of Eurocode 5) and to be able to predict the fire exposure and duration of fires in real buildings (needed for a performance-based approach). The research presented in this report studies the suitability of a furnace test for determining whether products exhibit glue line integrity failure or not. The study includes the determination of a conservative test duration, by comparisons with conditions of a statistically severe compartment fire. Furthermore, a round robin study with twelve fire tests in furnaces of different labs at different scales, fired with different fuel types has been performed. For all tests, the specimens were made of a mass timber material that does not exhibit glue line integrity failure. The average mass loss rate per unit of exposed area and the average charring rate were determined and assessment criteria were evaluated. Comparisons of the round robin study results have been made, against those of a specific CLT product that has been shown to maintain glue line integrity in numerous furnace and compartment fire tests and a recommendation of a pass/fail criterion is given for a future classification standard.

Place, publisher, year, edition, pages
2021. , p. 86
Series
RISE Rapport ; 2021:107
Keywords [en]
Glue line, bond line, adhesive, CLT, fire, fire induced delamination, fall off, mass timber
National Category
Building Technologies
Identifiers
URN: urn:nbn:se:ri:diva-59177ISBN: 978-91-89385-98-6 (electronic)OAI: oai:DiVA.org:ri-59177DiVA, id: diva2:1656291
Available from: 2022-05-05 Created: 2022-05-05 Last updated: 2023-05-16Bibliographically approved

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Brandon, Daniel

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CiteExportLink to record
Permanent link

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Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
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Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
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  • asciidoc
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