An Experimental Investigation of Hardwoods Harvested in Croatian Forests for the Production of Glued Laminated Timber

Glavinić, Ivana Uzelac; Boko, Ivica; Vranković, Jelena Lovrić; Torić, Neno; Abramović, Mario

doi:10.3390/ma16051843

Cited by 7 publications

(7 citation statements)

References 10 publications

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“…european hornbeam exhibits greater bending strength in comparison to the glued laminated timber made from turkey oak and maple [16].…”

Section: Bending Strengthmentioning

confidence: 96%

“…however, current climate conditions favor the growth of hardwood species [1]. As a result, there is increasing support for experimental research in glued laminated timber made from hardwood, most of which focuses on the integrity of glue lines [2][3][4][5]. To produce engineered wood products from hardwood, manufacturers have to adapt their technology in a way that is not precisely defined by standards.…”

Section: Introductionmentioning

confidence: 99%

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Suitability of selected hardwood species for the production of glued laminated timber

Lovrić Vranković,

Boko,

Uzelac Glavinić

et al. 2024

Materialwissenschaft Werkst

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Glued laminated timber made from hardwood is a sustainable structural product that is currently gaining momentum due to climatic changes and afforestation policy. Diversities in hardwood species have led to a lack of a complete standard for the production of glued laminated timber from hardwood in Europe. This paper addresses hardwood species available in Croatian forests, namely Carpinus Betulus L. (European hornbeam), Quercus Cerris L. (Turkey oak), and Acer Campestre L. (Maple), in terms of their suitability for the production of glued laminated timber. The suitability is assessed by a multi‐criteria analysis with seven criteria. Visual and physical properties include density, the occurrence of knots, and grain deviation in lamellas. Mechanical properties include the bending strength, modulus of elasticity, and shear strength of glue lines. In order to obtain physical and mechanical properties, corresponding experimental research has been carried out. Production costs have been evaluated in collaboration with the manufacturer. Results indicate a very high potential of European hornbeam and Turkey oak for the production of glued laminated timber.

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“…european hornbeam exhibits greater bending strength in comparison to the glued laminated timber made from turkey oak and maple [16].…”

Section: Bending Strengthmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Suitability of selected hardwood species for the production of glued laminated timber

Lovrić Vranković,

Boko,

Uzelac Glavinić

et al. 2024

Materialwissenschaft Werkst

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“…There was no report found on the acetylation of Turkey oak. If high dimensional stability and durability are achieved, it could be used for glulam production (Uzelac Glavinić et al 2023). The gluing difficulties of Turkey oak are the same as of other oaks: too high variation in density and permeability between earlywood and latewood, which hinders an adequate adhesive bond (Lavisci et al 1991).…”

Section: Referencesmentioning

confidence: 99%

11th Hardwood Conference Proceedings

2024

Hardwood Conference Proceedings

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Black locust (Robinia pseudoacacia L.) is the most widespread non-native tree species in Europe and has had a significant impact on the Central European landscape and forestry. The black locust has many exceptional characteristics that represent considerable potential for use by man. The climate shift in recent decades in Central Europe could further strengthen the importance of this tree species. However, there are also risks arising from the invasiveness of the black locust. Like Hungary, Czechia has had many years of experience with this tree species. Still, the current approach between these two countries, particularly in conventional forestry, differs. This paper attempts to summarise how the management of Robinia and its stands is viewed in Czechia, where the common forestry utilization of black locust is currently not considered due to its invasiveness. The reason for a more reserved forestry attitude in Czechia can be associated with the relatively frequent stem deformities of Robinia stands, which are often attributed to frost. However, the frost deformities and low stem-form quality of some Robinia stands do not affect their vigour and potential to invade adjacent habitats. It often takes considerable effort to remove black locust, especially where the spreading of Robinia threatens valuable adjacent ecosystems. On the other hand, there is great potential for the use of Robinia in Czechia. It can be found in controlled energy crops, fast-growing plantations (lignicultures), some land reclamation projects or urban greenery. Robinia can also be grown in small stands or in groups of trees surrounded by arable land that does not allow the tree to spontaneously spread. Regarding the production plantations of Robinia, the Hungarian experience and breeding program can be very inspiring for Czechia. Generally, there is a move towards 'site-specific management', but with a strong emphasis on the precautionary principle. Finding and then consistently applying a balanced approach to black locust management that not only allows for the potential but also respects the risks of Robiniait is currently a key challenge for Czech forestry, landscape and nature conservation.

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“…U ovom radu prikazani su parametri i koeficijenti determinacije za svaku od prethodno navedenih jednadžbi u usporedbi s krivuljama puzanja dobivenim eksperimentalnim testovima na dva LLN-a (LLN-1 i LLN-2) od graba. [11,12]. Opterećenje se simetrično nanosilo s dva cilindra na način da se maksimalna sila (𝐹 𝑚𝑎𝑥 ) dosegne u vremenskom intervalu od 300±120 s. Progibi su mjereni LVDT-ima povezanim s HBM akvizicijskim sustavom.…”

Section: Uvodunclassified

The application of selected creep models for glulam made from European hornbeam

Lovrić Vranković,

Boko,

Uzelac Glavinić

2023

Zajednički Temelji 2023. - uniSTem : Deseti Skup Mladih Istraživača Iz Područja Građevinarstva I Srodnih Tehničkih Znanosti, Sp

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This paper presents the application of selected models in order to determine the creep behavior of glued laminated timber beams (glulam) made from European hornbeam (Carpinus betulus L.) and loaded with a constant force during a period of three months. The selected models are the 'power law', Norton-Bailey, and Burger's model. The investigations were performed in the Construction Laboratory of the Faculty of Civil Engineering, Architecture and Geodesy in Split. Four-point bending tests were performed on glulam beams with an applied load level of 30% of the maximum force obtained from previously conducted short-term tests. The comparison was made between the coefficients of determination obtained in Matlab for each model. It can be concluded that all three of the selected models can be successfully applied in order to describe the creep behavior of glulam beams under long-term loading.

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An Experimental Investigation of Hardwoods Harvested in Croatian Forests for the Production of Glued Laminated Timber

Cited by 7 publications

References 10 publications

Suitability of selected hardwood species for the production of glued laminated timber

Suitability of selected hardwood species for the production of glued laminated timber

11th Hardwood Conference Proceedings

The application of selected creep models for glulam made from European hornbeam

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