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dc.contributor.author
Klippel, Michael
dc.contributor.author
Frangi, Andrea
dc.date.accessioned
2017-08-21T12:01:44Z
dc.date.available
2017-06-11T12:02:36Z
dc.date.available
2017-08-21T12:01:44Z
dc.date.issued
2014-06
dc.identifier.uri
http://hdl.handle.net/20.500.11850/88358
dc.identifier.doi
10.3929/ethz-a-010214961
dc.description.abstract
This testing report summarises the experimental investigations on finger-jointed timber speci- mens, glued with different types of adhesives, loaded in tension and exposed to standard ISO-fire. The tests were performed as part of the project entitled “Fire safety of bonded structural timber elements” in the frame of a CTI-project (Commission for Technology and Innovation). The extensive testing programme on finger-jointed timber specimens was performed in cooperation with industry partners at the Swiss Federal Institute of Technology Zurich (ETH Zurich). The main aim of this research project is to clarify if the currently used design model for the fire re- sistance of bonded structural timber elements, such as glued-laminated timber, should consider the behaviour of adhesives at elevated temperatures.<br/> In this experimental study, different adhesives available on the market from adhesive man- ufacturer from Europe (such as Casco AG, Dynea AG, Jowat AG, Türmerleim AG, Purbond AG) were tested. Adhesives being used for structural applications as well as adhesives not certified according to current European testing standards for the use in structural applications were tested. The fire performance of 12 different adhesives - of type 1C PUR, MUF, PRF, EPI, PVAc, UF - were tested in a finger-jointed connection for cross-sections with a width of 80, 140 and 200 mm.<br/> In total, 49 fire tests were performed under ISO-fire exposure at the Swiss Federal Labora- tories for Materials Testing and Research (EMPA) in Duebendorf/ Switzerland. Two tests were conducted with specimens equipped with thermocouples to determine the temperature distribu- tion along the cross-section width. In the other tests, different parameters and their influence on the fire resistance were varied, such as the adhesive in the finger joint, the width of the specimen, the load level and the type of fire exposure on the testing lamella.<br/> The tests were performed in two test series in March and April, 2011 as well as in July and August, 2012. The second test series was extended by five additional tests with higher graded timber in August 2013. The main result from the first test series can be concluded as follows: The adhesives tested (2 x PUR, 1 x MUF) fulfil current approval criteria according to EN 301 (2013c) and EN 15425 (2008) for the use in load-bearing timber components in Europe. The adhesives fulfil at least the A7 test at 70 ° C according to EN 302-1 (2013a). Taking into account the failure pattern, no significant difference was observed between these adhesives. It could be shown that the higher loss of strength for some adhesives tested at elevated temperature does not necessarily lead to the same loss of strength in fire, since defects like knots may be dominant - depending on the strength class (grading).<br/> The main result from the second test series can be concluded as follows: No substantial difference was obtained for finger-jointed specimens glued with PRF and other structural ad- hesives. The PUR adhesive fulfilling the ASTM D7247 (2007) standard test at temperatures higher than 200 ◦ C did not reach a higher fire resistance than PUR adhesives which do not fulfil this standard. It was found that adhesives, which are used in structural timber members such as glued-laminated timber beams, need sufficient strength at lower temperatures than 200 ◦ C. iv This is especially explained by the steep temperature gradient typical for timber members such as glued-laminated timber.<br/> In addition to the fire tests, about 120 tensile tests on finger-jointed lamellas were performed at normal temperature. These lamellas were produced with the same types of adhesives as studied in the fire tests. The results of the whole investigation are summarised in this test report.
en_US
dc.format
application/pdf
dc.language.iso
en
en_US
dc.publisher
Institut für Baustatik und Konstruktion, ETH-Zürich
en_US
dc.rights.uri
http://rightsstatements.org/page/InC-NC/1.0/
dc.subject
FIRE-RESISTANT STRUCTURES (BUILDING PROTECTION)
en_US
dc.subject
MULTI-LAYERED WOOD STRUCTURES (TIMBER CONSTRUCTION)
en_US
dc.subject
MEHRSCHICHTIGE HOLZKONSTRUKTIONEN (HOLZBAU)
en_US
dc.subject
KLEBSTOFFE, KLEBEMITTEL, KLEBER (FÜGETECHNIK)
en_US
dc.subject
FIRE BEHAVIOUR AND FIRE RESISTANCE OF BUILDING ELEMENTS AND MATERIALS (FIRE FIGHTING AND PROTECTION)
en_US
dc.subject
LEIMVERBINDUNGEN (HOLZINDUSTRIE)
en_US
dc.subject
FEUERBESTÄNDIGE TRAGWERKE (BAUTENSCHUTZ)
en_US
dc.subject
ADHESIVES, GLUE, PASTE (JOINING)
en_US
dc.subject
GLUED WOOD JOINTS (TIMBER INDUSTRY)
en_US
dc.subject
BRANDSCHUTZMASSNAHMEN + FEUERVERHÜTUNG (BAUTENSCHUTZ)
en_US
dc.subject
FIRE PROTECTION + FIRE PREVENTION (BUILDING PROTECTION)
en_US
dc.subject
BRANDVERHALTEN UND FEUERFESTIGKEIT VON BAUSTOFFEN UND BAUMATERIALIEN (BRANDBEKÄMPFUNG UND BRANDSCHUTZ)
en_US
dc.title
Fire tests on finger-jointed timber boards
en_US
dc.type
Report
dc.rights.license
In Copyright - Non-Commercial Use Permitted
dc.date.published
2014
ethz.journal.title
IBK Bericht
ethz.journal.volume
354
en_US
ethz.size
132 p.
en_US
ethz.code.ddc
DDC - DDC::6 - Technology, medicine and applied sciences::620 - Engineering & allied operations
en_US
ethz.identifier.nebis
010243025
ethz.publication.place
Zürich
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02115 - Dep. Bau, Umwelt und Geomatik / Dep. of Civil, Env. and Geomatic Eng.::02605 - Institut für Baustatik u. Konstruktion / Institute of Structural Engineering::08809 - Frangi, Andrea (Tit.-Prof.)
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02115 - Dep. Bau, Umwelt und Geomatik / Dep. of Civil, Env. and Geomatic Eng.::02605 - Institut für Baustatik u. Konstruktion / Institute of Structural Engineering
en_US
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02115 - Dep. Bau, Umwelt und Geomatik / Dep. of Civil, Env. and Geomatic Eng.::02605 - Institut für Baustatik u. Konstruktion / Institute of Structural Engineering::08809 - Frangi, Andrea (Tit.-Prof.)
ethz.date.deposited
2017-06-11T12:02:45Z
ethz.source
ECOL
ethz.source
ECIT
ethz.identifier.importid
imp5936523a1d96721134
ethz.identifier.importid
imp59366b623cb4b66816
ethz.ecolpid
eth:14436
ethz.ecitpid
pub:138971
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2017-07-19T04:30:55Z
ethz.rosetta.lastUpdated
2021-02-14T18:26:12Z
ethz.rosetta.versionExported
true
ethz.COinS
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