Effect of boric acid treatment on decay resistance and mechanical properties of poplar wood

Hashemi, Seyyed Khalil Hosseini; Latibari, Ahmad Jahan; Khademi-Eslam, Habibolah; Alamuti, Reza Faraji

doi:10.15376/biores.5.2.690-698

Cited by 5 publications

(1 citation statement)

References 6 publications

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“…Borate-based compounds have great potential. They are effective fungicides, bactericides and insecticides (Hosseini Hashemi et al 2010, Mohareb et al 2010, Lloyd et al 2020, while being less toxic than most commercial products (Bolt et al 2017, Uluisik et al 2018, Bolt et al 2020. As flame retardants, boron compounds intervene in the gas and condensation phases of thermal degradation (Garba 1999).…”

Section: Introductionmentioning

confidence: 99%

Fire performance of Pinus taeda wood treated with zinc borate before and after leaching

Camargo,

Ibáñez

2024

Maderas-Cienc Tecnol

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Owing to its physico-mechanical properties, wood is widely used in housing for both outdoor structures and indoors in floors, ceilings and others. However, its vulnerability to fire makes protection necessary for occupant safety and damage prevention. In this study, the fire performance of Pinus taeda (loblolly pine) wood from northeastern Uruguay treated with zinc borate synthetized in our laboratory is tested. The effect of leaching on zinc borate fire retardant properties was also evaluated. The following parameters associated with the thermal degradation process of wood were analyzed: flame spread, carbonized area, carbonization index and mass loss. The wood was radially and tangentially exposed to the flame in a Vandersall tunnel under controlled conditions for three exposure times: 30, 60, and 80 seconds. The micromorphology of the surfaces exposed to the flame at each exposure time was analyzed with a scanning electron microscope in order to evaluate fiber damage, zinc borate distribution within the wood, and the effects of leaching on fire performance. A clear improvement in the fire resistance of the zinc borate -treated wood could be verified for all exposure times; leaching did not affect its fire retardant properties despite the harsh conditions of the test, making the product potentially suitable for outdoor use.

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Section: Introductionmentioning

confidence: 99%

Fire performance of Pinus taeda wood treated with zinc borate before and after leaching

Camargo,

Ibáñez

2024

Maderas-Cienc Tecnol

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Performance evaluation of multiple adaptive regression splines, teaching–learning based optimization and conventional regression techniques in predicting mechanical properties of impregnated wood

et al. 2019

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Análise termomecânica da madeira de Corymbia citriodora submetida a gradientes térmicos

et al. 2014

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RESUMOA madeira, quando exposta a condições de estresse, como no caso de um gradiente de temperatura, pode levar a estrutura de uma determinada instalação ao desmoronamento. A taxa na qual a madeira se converte em carvão é determinante, em função da redução da seção resistente. A presente investigação teve como objetivo avaliar o comportamento termomecânico da madeira de Corymbia citriodora submetida a gradientes de temperatura e diferentes tempos de exposição, com diferentes tratamentos (Verniz e CCB), com o intuito de minimizar o processo de carbonização. No que diz respeito aos ensaios mecânicos, pode-se afirmar que o aumento da temperatura de carbonização e do tempo de exposição das amostras ocasionou um decréscimo da resistência à compressão paralelamente às fibras do material, ocasionado fragilidade de carregamento. Os tratamentos testados (CCB e Verniz) não apresentaram resultados satisfatórios no que diz respeito ao retardo da combustão, não sendo, portanto, recomendáveis para esses fins.Palavras-chave: resistência dos materiais, estruturas de madeira, temperatura. Thermo-mechanical Analysis of Corymbia citriodora Wood Subjected toThermal Gradients ABSTRACT Wood exposed to stress conditions, such as temperature gradients, may lead to collapse of installation structure. The rate at which wood becomes charcoal is crucial because of the reduction of the resistant section. This research aimed to evaluate the thermo-mechanical behavior of Corymbia citriodora wood subjected to temperature gradients and different exposure times, under different treatments (Varnish and CCB), in order to minimize the carbonization process. With respect to mechanical tests, it is possible to affirm that the increase in carbonization temperature and time of exposure of the samples resulted in a decrease in the compression strength parallel to the fibers of the material, causing brittleness. The treatments (Varnish and CCB) tested did not present satisfactory results with respect to combustion delay; therefore, they are not recommended for such purposes.

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Effect of boric acid treatment on decay resistance and mechanical properties of poplar wood

Cited by 5 publications

References 6 publications

Fire performance of Pinus taeda wood treated with zinc borate before and after leaching

Fire performance of Pinus taeda wood treated with zinc borate before and after leaching

Performance evaluation of multiple adaptive regression splines, teaching–learning based optimization and conventional regression techniques in predicting mechanical properties of impregnated wood

Análise termomecânica da madeira de Corymbia citriodora submetida a gradientes térmicos

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