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Norbäck, V. (2023). Biobaserad Lösullsfyllning – en förstudie.
Open this publication in new window or tab >>Biobaserad Lösullsfyllning – en förstudie
2023 (Swedish)Report (Other academic)
Abstract [sv]

Biobaserad lösullsfyllning används i svenska byggnader idag men inte i industriell skala. Intervjuer och en enkätundersökning har genomförts med industriella tillverkare av trähus och leverantörer av biobaserad isolering med syfte är att utreda varför de industriella tillverkarna inte använder inblåst isolering gjord av biobaserad råvara. Marknaden har skannats av på vilka material som finns tillgängliga och hur vissa av dessa skiljer sig åt med avseende på prestanda och klimatpåverkan. De svenska industriella hustillverkarna är intresserade av materialen då de medför både lägre klimatpåverkan än traditionell isolering och innebär produktionsfördelar. Att ställa om innebär dock risker; ny utrustning behöver köpas in, ett nytt produktionssätt ska trimmas in, ny dokumentation ska framställas och det finns fortfarande en osäkerhet kring materialens prestanda och leverantörernas förmåga att tillgodose de volymer som krävs.

Publisher
p. 24
Series
RISE Rapport ; 2023:3
Series
SMART HOUSING SMÅLAND SHS rapportnr: 30060
National Category
Civil Engineering
Identifiers
urn:nbn:se:ri:diva-73096 (URN)978-91-89757-47-9 (ISBN)
Available from: 2024-05-03 Created: 2024-05-03 Last updated: 2024-05-03Bibliographically approved
Jockwer, R., Landel, P., Norbäck, V., Ziethén, R., Dölerud, E., Naveda, L. A. & Åkerström, C.-J. (2023). FATIGUE RESISTANCE OF ADHESIVE BONDED CONNECTIONS WITH AND WITHOUT INTERNAL STEEL PLATES IN LARGE TIMBER STRUCTURES. In: World Conference on Timber Engineering (WCTE 2023): . Paper presented at World Conference on Timber Engineering (WCTE 2023), Oslo, Norway (pp. 2118-2124).
Open this publication in new window or tab >>FATIGUE RESISTANCE OF ADHESIVE BONDED CONNECTIONS WITH AND WITHOUT INTERNAL STEEL PLATES IN LARGE TIMBER STRUCTURES
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2023 (English)In: World Conference on Timber Engineering (WCTE 2023), 2023, p. 2118-2124Conference paper, Published paper (Refereed)
Abstract [en]

A modular wooden wind turbine tower has been developed by the Swedish company Modvion AB, where the prefabricated modular elements are connected by glued timber-timber edge joints and by hybrid timber joints with bonded-in perforated steel plates. The application of wood-based products in such a demanding application and highperformance structure is challenging and a variety of questions had to be solved to ensure a reliable performance. The fatigue performance of the adhesive bonded connections has been evaluated in a research project and is presented in this paper. Test specimens of the fatigue resistance of the adhesive and the bond line has been developed. Different stress ratios with alternating loads and high numbers of load cycles have been tested. The results of the tests are presented in this paper.

Keywords
Bonded-in steel plates, adhesive testing, butt-joints, fatigue strength
National Category
Building Technologies
Identifiers
urn:nbn:se:ri:diva-66209 (URN)10.52202/069179-0281 (DOI)
Conference
World Conference on Timber Engineering (WCTE 2023), Oslo, Norway
Note

The project “Strong Enough: Testing technology for environmentally friendly and cost-efficient wind turbine towers” with project number 2020-014383 described in this paper was funded by Energimyndigheten, the Swedish Energy Agency.

Available from: 2023-09-20 Created: 2023-09-20 Last updated: 2024-05-17Bibliographically approved
Norbäck, V., Landel, P., Dölerud, E. & Wickström, A. (2023). ON-SITE GLUING AND WEATHER EFFECTS ON TALL WOODEN WINDTURBINE TOWERS. In: : . Paper presented at WCTE World Conference on Timber Engineering. 2023. Oslo, Norway..
Open this publication in new window or tab >>ON-SITE GLUING AND WEATHER EFFECTS ON TALL WOODEN WINDTURBINE TOWERS
2023 (English)Conference paper, Published paper (Refereed)
Abstract [en]

Modvion develops modular wind turbine towers made of wood. The application requires strong and stiff connections and to achieve the desired performance, a hybrid connection with perforated steel plates slotted into LVL modules is used. The parts will be glued together on site, using a polyurethane adhesive (PUR), providing high strength and stiffness to the connection. This paper presents a preliminary screening on how temperature and relative humidity of the surrounding air during assembly and curing will influence the strength of the bond glued on-site. Static tests were performed on the hybrid connections which were glued and cured in different climates. Tests were also performed at different hardening times to evaluate strength growth in the studied climates. The test results show that at cold temperatures of 9 °C to 12 °C there is a breakpoint where the rate of strength growth starts to decline. The experiments show also that the relative humidity may influence the final strength of the bond. However, the low number of tested specimens brings uncertainties to this observation. High temperatures up to 27 ºC and dry climates down to 20% RH did not impact the strength of the tested hybrid connections.

Keywords
Hybrid connection, Polyurethane adhesive, On-site gluing, LVL, Glued-in plates connection type
National Category
Construction Management
Identifiers
urn:nbn:se:ri:diva-65516 (URN)
Conference
WCTE World Conference on Timber Engineering. 2023. Oslo, Norway.
Note

This project is funded by Energimyndigheten (SwedishEnergy Agency) through SWPTC (Swedish Wind PowerTechnology Centre at Chalmers University). SWPTCaims to develop the Swedish wind turbine industry andpromote its expansion.

Available from: 2023-06-16 Created: 2023-06-16 Last updated: 2023-11-21Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0009-0009-2583-550X

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