Natural durability and improved resistance of 20 Amazonian wood species after 30 years in ground contact

Gouveia, Fernando Nunes; Silveira, Marcelo Fontana da; Garlet, Alencar

doi:10.1515/hf-2020-0192

Cited by 3 publications

(5 citation statements)

References 32 publications

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“…Wood has great potential to become a key material for future bio-economy due to its intrinsic renewability and capacity to store carbon dioxide, as stated by Panzarasa and Burgert [13] and [14,15]. Woody species and materials are numerous as confirmed by De Araujo et al [16,17], Knauf [18], and Gouveia et al [19]. Hardwoods are efficient for structural ends, as proved by Wolenski et al [20] and Marcolin et al [21].…”

Section: Timber Construction and The Demand About Its Electronic Marketmentioning

confidence: 91%

Is the Timber Construction Sector Prepared for E-Commerce via Instagram®? A Perspective from Brazil

et al. 2022

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Timber construction is a contemporary solution where sales are performed through in-store trade. Timber house e-commerce may stimulate global markets, and in times of intense remote routines, it is useful to improve the performance of the wood and construction sectors. Timber housing producers and dealers are the research object under analysis to study the electronic market of this Brazilian sector on Instagram®. With just over four hundred companies, nearly 80% of this sector already utilizes this virtual social network. We validated the outcomes through a significant sampling of all 315 companies with corporate profiles to identify their competences, goals, and failures. The profiles prioritize the elucidation of products and basic features, not yet being ready for the virtual sales of timber houses. The study makes it clear that our results typify a sector marked by a developing electronic market. Inserting a description of product prices and detailed specifications may change this status. From failures and competences, a classification for social profiles was proposed to measure the progress and virtual participation of each individual.

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Section: Timber Construction and The Demand About Its Electronic Marketmentioning

confidence: 91%

Is the Timber Construction Sector Prepared for E-Commerce via Instagram®? A Perspective from Brazil

et al. 2022

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“…Natural durability is an inherent property of wood defined by its resistance to wood-destroying agents. It results from a combination of different parameters like chemical composition (mainly extractives compounds) and anatomical characteristics that are linked to the genetic determinants (Gouveia et al 2021). The resistance of wood against destroying organisms is complex but can be assessed through a variety of test protocols, whether at a laboratory level or under field conditions (Kutnik et al 2017).…”

Section: Introductionmentioning

confidence: 99%

Natural durability of 8 tropical species suitable for structural roundwood: laboratory screening tests for resistance to fungi and termites

LEROY,

CANDELIER,

DAMAY

et al. 2023

Bois for. trop.

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Knowledge of the wood properties of tropical tree species is still relatively limited, so timber extraction focuses on a few abundant, large-diameter species. Very little is known about small-diameter trees, although they could be used directly as roundwood for construction. The aim of this study was to determine the natural durability of 8 candidate species for use as structural roundwood in French Guiana: Goupia glabra, Licania alba, Hymenopus heteromorphus, Lecythis persistens, Oxandra asbeckii, Pouteria bangii, Simarouba amara, Tachigali melinonii and Virola surinamensis. Samples of their wood were exposed to white rot (European and tropical), brown rot (European), and European subterranean termites (using non-choice and multi-choice tests) in laboratory conditions and subjected to screening tests adapted from European standards. Only two species were classified as durable against both fungi and termites: L. alba and P. bangii, which means they can be used without treatment as building material in tropical or temperate climates. The other species tested were classified (1) as durable but with notable differences observed in their resistance to fungi and termites respectively (G. glabra, L. persistens, O. asbeckii), (2) moderately durable (H. heteromorphus), (3) low durability to sensitive (T. melinonii, S. amara, V. surinamensis), meaning actual European standards would not let use these last species in outdoor structures without protection, despite their use by local population in traditional building. However, they could be used for building purposes with appropriate protection systems (including wood protection). The results we obtained for resistance to wood decay provide essential information to assess the potential of these eight tree species in French Guiana’s construction sector.

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“…These organisms focus on the cell wall, which contains essential natural polymers, as a source of nutrition and energy. Xylophagous organisms responsible for the greatest deterioration of wood are fungi and insects (Gouveia et al 2021).…”

Section: Introductionmentioning

confidence: 99%

“…Fungi occurring in wood can be divided into mold, stain, and decaying fungi. The latter group is responsible for the deterioration of the wood cell wall, especially fungi of the class Basidiomycetes, responsible for brown and white rot (Emmerich et al 2021;Gouveia et al 2021).…”

Section: Introductionmentioning

confidence: 99%

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Resistance of acetylated Jacaranda copaia wood to termites and decaying fungi attack

et al. 2022

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The natural durability of the wood is essential for the definition of its use, and this property can be enhanced with the proper chemical treatment of the wood. Thus, the objective of this study was to evaluate the resistance to termites and decay fungi of Jacaranda copaia wood chemically modified through acetylation. Five experimental treatments were assessed: acetylation for 2, 4, 6 and 8 hours and a control (non-acetylated). The acetylation was carried out by immersing wood samples in acetic anhydride at 90 °C. Acetylated and control samples were subjected to the action of xylophagous termites (Nasutitermes sp.) and decaying fungi (Gloeophyllum trabeum and Trametes versicolor). The acetylation process significantly increased the resistance of Jacaranda copaia wood to the attack of the xylophagous organisms. There was no mass loss after exposure to termites of the wood in any of the acetylation treatments, while in the control wood, mass loss was 9.5%. Regarding the decaying fungi, mass loss occurred in all treatments. Acetylation for 6 and 8 hours were the most efficient chemical treatments, increasing the resistance class of the Jacaranda copaia wood to highly resistant.

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Natural durability and improved resistance of 20 Amazonian wood species after 30 years in ground contact

Cited by 3 publications

References 32 publications

Is the Timber Construction Sector Prepared for E-Commerce via Instagram®? A Perspective from Brazil

Is the Timber Construction Sector Prepared for E-Commerce via Instagram®? A Perspective from Brazil

Natural durability of 8 tropical species suitable for structural roundwood: laboratory screening tests for resistance to fungi and termites

Resistance of acetylated Jacaranda copaia wood to termites and decaying fungi attack

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