lnu.sePublikationer
Ändra sökning
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Characteristics assessment of aspen logs used in the production of matches
Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för skog och träteknik (SOT).
2018 (Engelska)Självständigt arbete på avancerad nivå (masterexamen), 20 poäng / 30 hpStudentuppsats (Examensarbete)
Abstract [en]

Aspen (Populus tremula L.) accounts for about 2% of the total wood stock in Sweden. Sawmills use only a small part (about 5,000 m³fub) of round wood aspen per year. Since there are no Swedish gradings and design values for aspen, no aspen is used for structural purposes. This also applies to other hardwood trees in Sweden. Aspen is mainly used for pulp and paper with a mass consumption of 800,000 m³fub per year of which about 50% is imported. Most imported aspen is from Russia and the Baltics. The other major use of aspen is in match industries. Consumption for matches amounts to approximately 30,000 m³fub per year in Sweden.

The aim of the research work was to increase knowledge on the wood quality of aspen used in the production of matches. Aspen (Populus tremula L.) logs were collected from two different sites in Sweden and a non-destructive tools weas used to estimate the modulus of elasticity in logs. To measure the dynamic modulus of elasticity (MOEdyn), Fakopp resonance log grader used. Other properties like density and moisture content were measure and were correlated with the MOEdyn values in order to identify the site that has a better log quality. Besides, horizontal and vertical variation of different wood properties were measured and compared within and between trees from two different sites in order to justify the variation of log quality. A total of 20 trees from Askaremåla and Vimmerby, Sweden were felled and used in this study. From each tree, 3 m long logs were sampled from each base, middle and top. After that, non-destructive evaluations were performed in those logs. Besides, 5 cm thick discs were collected in every tree height (base, middle and top) to measure horizontal and vertical variations.

This study shows that there were differences in MOEdyn between and within trees. It was evident that trees collected from Vimmerby had a better log property than that in Askaremåla. Using non-destructive tools, it is possible to sort out quality logs for the production of Swedish matches.

Ort, förlag, år, upplaga, sidor
2018. , s. 47
Nyckelord [en]
Non-destructive technique, resonance, stiffness, aspen, moisture content, basic density, cross sectional diameter area, bark width, grain angle, taper, sound velocity
Nationell ämneskategori
Trävetenskap
Identifikatorer
URN: urn:nbn:se:lnu:diva-75913OAI: oai:DiVA.org:lnu-75913DiVA, id: diva2:1218556
Externt samarbete
Swedish Match Industry
Ämne / kurs
Skogs- och träteknik
Utbildningsprogram
Innovation genom ekonomi, teknik och design - inriktning teknik, masterprogram, 120 hp
Handledare
Examinatorer
Tillgänglig från: 2018-06-15 Skapad: 2018-06-14 Senast uppdaterad: 2018-06-15Bibliografiskt granskad

Open Access i DiVA

fulltext(1431 kB)90 nedladdningar
Filinformation
Filnamn FULLTEXT01.pdfFilstorlek 1431 kBChecksumma SHA-512
4b82839af4954346e392b166ed1150505a611c00ea4bcb07a3b4185463a49fa0afa50d489f6c2a8ba6d5088e1bcdd9430cf6244d6c7c496bccb11e134e3bb51f
Typ fulltextMimetyp application/pdf

Av organisationen
Institutionen för skog och träteknik (SOT)
Trävetenskap

Sök vidare utanför DiVA

GoogleGoogle Scholar
Totalt: 90 nedladdningar
Antalet nedladdningar är summan av nedladdningar för alla fulltexter. Det kan inkludera t.ex tidigare versioner som nu inte längre är tillgängliga.

urn-nbn

Altmetricpoäng

urn-nbn
Totalt: 174 träffar
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf