Effects of Veneer Treatment with Copper-Based Preservatives on the Decay Resistance and Mechanical Properties of Poplar LVL

Jin, Juwan; Jin-tao, Wang; Qin, Daochun; Luo, Na; Niu, Haojie

doi:10.1080/02773813.2016.1148167

Cited by 11 publications

(3 citation statements)

References 7 publications

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“…To improve the durability of poplar laminated veneer lumber (LVL), the veneers were impregnated with alkaline copper quaternary (ACQ) and copper azole (CA) at four retention levels The effects of the treatments on the LVL properties demonstrated that the treatments substantially improved the decay resistance. Additionally, no significant effects of the treatments were observed on the mechanical properties of LVLs, and the LVLs did not display any visible delamination after boil-dry treatment (Jin et al 2016). Before manufacturing LVL, veneers were subjected to heat treatment at varying temperatures (up to 180 °C) and for varying durations of heating inducing significant differences in physical and mechanical properties of the poplar LVLs.…”

Section: Treated and Reinforced Hardwood Lvlmentioning

confidence: 98%

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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Section: Treated and Reinforced Hardwood Lvlmentioning

confidence: 98%

11th Hardwood Conference Proceedings

2024

Hardwood Conference Proceedings

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“…The treated scrimbers could be classed as highly resistant to fungal decay (ML ≤ 10%). Jin et al [33] reported that the mass losses caused by T. versicolor and G. trabeum of CuAz-treated poplar LVL (with a retention of 0.85 kg/m 3 ) were 21.9% and 14.2% after 17 weeks of incubation, respectively. Copper tolerance is generally associated with brown-rot fungi, including G. trabeum fungi [34,35].…”

Section: Mass Loss Analysismentioning

confidence: 99%

Changes in Chemical Composition, Crystallizability, and Microstructure of Decayed Wood-Fiber-Mat-Reinforced Composite Treated with Copper Triazole Preservative

Bao

Tang

Bao

et al. 2022

Forests

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Wood-fiber-mat-reinforced composites (WFMRCs) possess excellent physical and mechanical properties and provide high structural performance, making them a suitable engineering structural material. However, WFMRCs are susceptible to biological attack by fungi and insects when they are used in outdoor environments. In this study, the efficacy of copper triazole (CuAz) preservative treatment in protecting WFMRC against decay by white- and brown-rot fungi (Trametes versicolor and Gloeophyllum trabeum, respectively) was evaluated. Both fungi caused a mass loss in the untreated scrimber of more than 15%, while the CuAz preservative treatment reduced the mass loss to 5%. The measurement results show that CuAz treatment could effectively reduce the degradation rate of three major components of wood; inhibit fungal colonization and degradation; and improve the decay resistance of WFMRC. The atmospheric impregnation of CuAz preservative is more suitable for the material features of WFMRC than vacuum impregnation and can be considered for practical industrial applications. This study provides technical support for the protection and outdoor application of WFMRCs.

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“…However, the loss of copper ions and some ammonium species deteriorates the resistance of the wood because of the active ingredient in ACQ is soluble in water (Druz et al 2001, Li et al 2006, Civardi et al 2015, Tang et al 2018. In production, the volume loading of ACQ in the wood was improved by increasing the pressure, and classify the wood's corrosion resistance level (Liu et al 2019, Yildiz et al 2010, Jin et al 2016. In fact, large volume doi:/10.37763/wr.1336-4561/65.…”

Section: Introductionmentioning

confidence: 99%

Study on the permeation and fixation of ACQ-C in poplar

Hong¹,

Hu²,

Jin³

et al. 2020

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In this paper, the effects of atmospheric pressure, vacuum and vacuum pressure impregnation on the permeability of alkaline copper quat in poplar were studied, and the permeability and fixation of preservatives were improved by pretreatment of poplar. The results show that the volume loading of wood can be increased by about 60-150% after 30 min of vacuum treatment, so the vacuum method is a simple and efficient preservation treatment method. In addition, ethanol treatment, heat treatment and microwave treatment can increase the fixation rate of copper ions by 5-10%, but the fixation rate of copper ions dropped by 17.83% after NaOH treatment for the dissolution of partial hemicellulose.

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Effects of Veneer Treatment with Copper-Based Preservatives on the Decay Resistance and Mechanical Properties of Poplar LVL

Cited by 11 publications

References 7 publications

11th Hardwood Conference Proceedings

11th Hardwood Conference Proceedings

Changes in Chemical Composition, Crystallizability, and Microstructure of Decayed Wood-Fiber-Mat-Reinforced Composite Treated with Copper Triazole Preservative

Study on the permeation and fixation of ACQ-C in poplar

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