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Delamination of Cross-laminated timber and its impact on fire development | Focusing on different types of adhesives

Johansson, Eric LU and Svenningsson, Anton LU (2018) In LUTVDG/TVBB VBRM10 20172
Division of Fire Safety Engineering
Abstract
In the recent decade, the interest of building taller all-timber structures using engineered timber materials such as cross-laminated timber (CLT) has increased substantially. On the other hand, there’s also a significant resistance and fear concerning the fire safety of buildings with wood-based load-bearing structures. In this report, the aim is to investigate the potential deviations of the fire performance of CLT. More specifically the occurrence of losing entire layers due to fire exposure, delamination, and how this might affect the fire development. Fire tests were performed in a standard testing furnace with specimens of CLT manufactured with five different adhesives. For these tests, the fire conditions of a previous full-scale... (More)
In the recent decade, the interest of building taller all-timber structures using engineered timber materials such as cross-laminated timber (CLT) has increased substantially. On the other hand, there’s also a significant resistance and fear concerning the fire safety of buildings with wood-based load-bearing structures. In this report, the aim is to investigate the potential deviations of the fire performance of CLT. More specifically the occurrence of losing entire layers due to fire exposure, delamination, and how this might affect the fire development. Fire tests were performed in a standard testing furnace with specimens of CLT manufactured with five different adhesives. For these tests, the fire conditions of a previous full-scale test were attempted to be replicated. After evaluating the results, it was concluded that the type of adhesive used, could have a significant impact on whether a CLT-element delaminates or not. Furthermore, delamination also has a severe impact on the fire development, increasing the temperatures and extending the duration of the fire. CLT as a future building material still faces a lot of challenges, and further research is needed to optimise the composition of the material and investigate complications other than fire performance as well. (Less)
Popular Abstract (Swedish)
För framtidens träkonstruktioner är limträprodukter, så som
korslimmat trä, helt avgörande för utvecklingen. Korslimmat trä kan tillämpas som prefabricerade element i såväl bärande väggar, som bjälklag och öppnar upp för helt nya möjligheter för snabbt, hållbart byggande. Samtidigt finns det ett kraftigt motstånd från
många håll mot det ökande användandet av trä i bärande konstruktioner, inte minst ur ett brandsäkerhetsperspektiv. Tidigare forskning om brandbeteendet hos solitt trä är omfattande, men när det gäller eventuella avvikelser hos modernare
limträprodukter, är beteendet mindre känt.
Please use this url to cite or link to this publication:
author
Johansson, Eric LU and Svenningsson, Anton LU
supervisor
organization
alternative title
Delaminering av korslimmat trä och dess inverkan på brandförloppet | Med fokus på olika limtyper
course
VBRM10 20172
year
type
H2 - Master's Degree (Two Years)
subject
keywords
CLT, cross-laminated timber, X-lam, delamination, engineered timber, adhesive, glue, tall timber buildings, timber load-bearing structures, charring rate, NFPA, Paramteric fires, standard testing furnace
publication/series
LUTVDG/TVBB
report number
5562
other publication id
LUTVDG/TVBB--5562--SE
language
English
id
8938664
date added to LUP
2018-04-13 08:16:40
date last changed
2018-05-29 09:36:13
@misc{8938664,
  abstract     = {{In the recent decade, the interest of building taller all-timber structures using engineered timber materials such as cross-laminated timber (CLT) has increased substantially. On the other hand, there’s also a significant resistance and fear concerning the fire safety of buildings with wood-based load-bearing structures. In this report, the aim is to investigate the potential deviations of the fire performance of CLT. More specifically the occurrence of losing entire layers due to fire exposure, delamination, and how this might affect the fire development. Fire tests were performed in a standard testing furnace with specimens of CLT manufactured with five different adhesives. For these tests, the fire conditions of a previous full-scale test were attempted to be replicated. After evaluating the results, it was concluded that the type of adhesive used, could have a significant impact on whether a CLT-element delaminates or not. Furthermore, delamination also has a severe impact on the fire development, increasing the temperatures and extending the duration of the fire. CLT as a future building material still faces a lot of challenges, and further research is needed to optimise the composition of the material and investigate complications other than fire performance as well.}},
  author       = {{Johansson, Eric and Svenningsson, Anton}},
  language     = {{eng}},
  note         = {{Student Paper}},
  series       = {{LUTVDG/TVBB}},
  title        = {{Delamination of Cross-laminated timber and its impact on fire development | Focusing on different types of adhesives}},
  year         = {{2018}},
}