Publikasjoner
NIBIOs ansatte publiserer flere hundre vitenskapelige artikler og forskningsrapporter hvert år. Her finner du referanser og lenker til publikasjoner og andre forsknings- og formidlingsaktiviteter. Samlingen oppdateres løpende med både nytt og historisk materiale. For mer informasjon om NIBIOs publikasjoner, besøk NIBIOs bibliotek.
2026
Sammendrag
Det er ikke registrert sammendrag
Forfattere
Eirik NordhagenSammendrag
Ny forskning viser at gran fra Nordland og Troms tilfredsstiller kravene til konstruksjonsvirke når den styrkesorteres etter gjeldene regler. Skogen som ble plantet før og etter 1945 kan etter hvert avvirkes, og representerer en betydelig ressurs for bygg og rehabilitering. Utfordringen er ikke kvaliteten på råstoffet – men trolig manglende lokal foredling og bruk.
Sammendrag
Hva slags materialer finner vi på gjenvinningsstasjoner rundt om i landet og hvor mye av det kan brukes på nytt? Dette spørsmålet stilte forskerne i CircWood seg da prosjektet startet i 2022.
Sammendrag
Det er ikke registrert sammendrag
Sammendrag
Svært mye tre i Norge kan gjenbrukes, men det er viktig å forstå kvalitet og mengde. Over halvparten av treet som leveres til gjenvinningsstasjonene, er bærende og ubehandlet heltre.
Forfattere
Shumaila Khatri Hanne Kathrine Sjølie Kristina Bringedal Gedde Lizhen Huang Per Kr. Rørstad Roja Modaresi Lone RossSammendrag
This report summarizes the main findings of the research conducted within the CircWOOD project during the period 2022-2026 and presents key recommendations for decision-makers towards wood reuse in the construction sector. CircWOOD aimed to enable and support a transition to a sustainable, competitive, and technologically optimized circular wood value chain through a transdisciplinary research approach. The project was carried out by five research institutions and universities, exploring technical, environmental, economic, and social dimensions in the value chain. Our research findings demonstrate potentials for wood reuse, while also highlighting a variety of practical and market-related challenges. The report presents eight key recommendations for policymakers, industry stakeholders, and other decisionmakers to drive wood reuse. Improving sorting systems and quality control for wood waste from construction and demolition activities and prioritizing deconstruction over demolition can enable reuse. Developing supporting infrastructure such as material banks, reuse centers, and logistics systems is also important. Wood reuse can create new opportunities for businesses, while continued research, better data, and AI can strengthen decision-making and support a more resource-efficient built environment.
Sammendrag
På 1940- og 50-tallet ble det plantet mye ny granskog i Nord-Norge. Denne skogen er nå i ferd med å bli hogstmoden. Kan den brukes?
Sammendrag
På 1940- og 50-tallet ble det plantet mye ny granskog i Nord-Norge. Denne skogen er nå i ferd med å bli hogstmoden. Spørsmålet har imidlertid lenge vært om nordnorsk grantømmer har tilstrekkelige styrkeegenskaper til bruk som trelast i bærende konstruksjoner. Ifølge nye undersøkelser foretatt av forskere ved NMBU og NIBIO er svaret ja.
Sammendrag
This study investigates the moisture-induced recovery of temporary property changes in thermo-mechanically densified (TMD) birch and aspen wood, compared to thermally modified (TM) wood. Both treatments were prepared under identical thermal conditions, differing only by compression in TMD. Dimensional stability, water vapour sorption, and Brinell hardness were assessed before and after repeated wetting and drying cycles to evaluate the effect of stress storage in the polymer matrix and its recovery during moisture exposure. The results indicate that both TMD and TM treatments induce a temporary reduction in moisture uptake, consistent with the formation of an annealed polymer structure. Water saturation and subsequent drying restored higher moisture content and reduced Brinell hardness in TMD wood, highlighting a moisture-driven recovery of the annealed polymer conformation. Notably, the decrease in hardness could not be attributed solely to the reduction in bulk density, indicating additional effects of polymer plasticisation. The presence of compression stresses during TMD appeared to enhance stress storage, thereby influencing the recovery of moisture-induced properties. Initial wood moisture content before TMD had little effect on the temporary reduction in moisture content, suggesting that annealing also occurs in dry states. These findings emphasise the need to account for moisture cycling in TMD wood’s service life. Future work should focus on the interplay between compression stresses and the annealing effect to reduce the temporary nature of the property improvements by TMD.
Sammendrag
Wood has many attractive material qualities, but it is susceptible to biological degradation by wood-decaying fungi. Moisture is one of the critical requirements for wood decay, but much remains unknown about moisture dynamics in decaying wood. To fill this knowledge gap, this study investigated moisture in Scots pine sapwood during decay caused by the brown rot fungus Coniophora puteana. Samples were exposed to decay in two time-series experiments; mass loss and moisture content were recorded over the course of decay, and the bound and free water populations in the samples were analysed using low-field nuclear magnetic resonance (LFNMR) relaxometry in both the decaying state and at full water saturation. Selected samples were also used for water vapour sorption measurements. The time-series decay tests showed that moisture content initially increased due to fungal activity but decreased over time when corrected for mass loss, contrary to the general belief that moisture content increases with decay. LFNMR revealed that bound water content increased on a decayed-mass basis in the decaying state and at saturation, but no increase was seen after correction for mass loss. Free water content followed gravimetric moisture content in the decaying state, but the saturated state measurements revealed an initial increase and subsequent decrease with mass loss. Degradation caused changes in hygroscopicity, but our data show that overall moisture content is regulated by fungal activity rather than by material properties. These findings highlight the complexity of water interactions during fungal degradation, offering valuable new insights into wood degradation mechanisms.