Efeito da Concentração na Ascensão de Soluções Preservativas Preparadas com CCB em Moirões de Eucalyptus

Paes, Juarez Benigno; Lopes, Dercílio Júnior Verly; Gonçalves, Fabrício Gomes; Brito, Flávia Maria Silva; Lombardi, Lucas Recla

doi:10.1590/2179-8087.036913

Cited by 6 publications

(4 citation statements)

References 3 publications

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“…This technique is one of the most used to verify metals retained in wood, as suggested by Vivian et al (2012). The sample digestion was performed according to the methodology proposed by Paes et al (2014). The obtained values were converted into retention units (kg of active ingredient per m³ of treated wood).…”

Section: Samples Preparation and Determination Of The Retention And Pmentioning

confidence: 99%

CCB Retention and Penetration in Eucalyptus Fence Posts in Function of Condition of Preservative Treatment

Lima

Gouveia

Baraúna

et al. 2020

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The objective of this work was to evaluate the efficiency of the industrial preservative treatment with Chromated Copper Borate (CCB) in different concentrations and pressure time in the autoclave through retention and penetration in Eucalyptus wood. Nine Eucalyptus trees were felled, debarking and cut into fence posts with a length of 2.20 meters and diameters ranging from 9.2 to 15.4 cm. The Eucalyptus fence posts were submitted to the industrial autoclave (Bethel method) in nine conditions, according to the CCB concentration and the pressure times: 1.5%, 2.0%, and 2.5% and 30, 60 and 90 minutes. The retention and penetration tests were performed. The application of 1.5% CCB concentration and 30 minutes of pressure in the autoclave provided penetration and retention according to the levels required for the application of the wood as fence posts in contact with the soil, and is the conditions indicated for the treatment E. urograndis wood preservative with CCB.

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Section: Samples Preparation and Determination Of The Retention And Pmentioning

confidence: 99%

CCB Retention and Penetration in Eucalyptus Fence Posts in Function of Condition of Preservative Treatment

Lima

Gouveia

Baraúna

et al. 2020

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“…Para a determinação da retenção de CCA, efetuou-se a digestão úmida das amostras de 1,5 × 1,0 × 2,0 cm (radial × tangencial × longitudinal), apenas na região de 0,50 m (Figura 1). Para tanto, empregou-se a metodologia citada por Paes et al (2014), que constou da determinação do volume das amostras de madeira e incineração para obtenção das cinzas e sais metálicos, a 525 °C, e posterior adição de 3 mL da mistura dos ácidos sulfúrico, perclórico e nítrico, todos concentrados, nas proporções de 7:2:1, às cinzas obtidas pela incineração.…”

Section: Coleta E Preparo Do Materialsunclassified

“…Com estes valores e com os volumes das amostras de madeira, os cálculos de retenção foram efetuados de acordo com a Equação 1, citada por Paes et al (2014). A determinação da distribuição e penetração do CCA teve como base o elemento cobre presente na madeira tratada.…”

Section: Coleta E Preparo Do Materialsunclassified

Influências do Diâmetro e Umidade da Madeira na Qualidade do Tratamento Preservativo

et al. 2017

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RESUMOAvaliaram-se os efeitos do teor de umidade e classe diamétrica na qualidade do tratamento de moirões de Corymbia torelliana e Eucalyptus grandis x Eucalyptus urophylla. Utilizaram-se 108 moirões, sendo 36 tratados e 18 não tratados, com 2,20 m de comprimento e umidade de 15 a 20%; 20 a 30%; 30 a 40%, e diâmetros de 8 a 10 cm; 10 a 12 cm; 12 a 14 cm. No tratamento, foram utilizados 2% de ingredientes ativos de CCA-C, vácuo inicial e final de 550 mmHg (30 min), pressão de 11 kgf cm -2 (1 h). Os moirões tiveram a umidade avaliada pelo medidor elétrico, que foi adequado para estimar a umidade destes. Obtiveram-se penetrações satisfatórias e a maior retenção foi obtida nos moirões com umidade de 15 a 20% (8,23 kg m -3 ), contudo, umidade de 30 a 40% também foi adequada ao tratamento da madeira, obtendo valores superiores a 6,5 kg m -3 .Palavras-chave: tratamento de moirões, arseniato de cobre cromatado, penetração, retenção. Influences of Diameter and Wood Moisture on Quality of the Preservative Treatment ABSTRACTWere evaluated the effects of moisture content and diametric class in industrial treatment quality of Corymbia torelliana and Eucalyptus grandis x Eucalyptus urophylla fence posts. 108 fence posts were used, 36 treated and 18 non-treated, with 2.20m long and moisture content of 15 to 20%; 20 to 30%; and 30 to 40% and diameters of 8 to 10cm; 10 to 12cm; 12 to 14cm. For treatment, were used 2% active ingredients of CCA-C, initial and final vacuum 550 mmHg (30min), pressure of 11 kgf cm -2 (1h). The fence posts were evaluated by electric meter that was adequate to estimate the moisture. Satisfactory penetrations were obtained and the biggest retention was reached in fence posts with moisture of 15 to 20% (8.23 kg m -3 ), however, the moisture content of 30 to 40% was also suitable for the treatment of wood, getting values higher than 6.5 kg m -3 .

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“…m -3 ) of wood 2007;2008;2014;RAMOS et al, 2006;TORRES et al, 2011). It is important to mention that, in addition to woodrelated characteristics and treating method used, the solution concentration has influence on the quality and efficiency of the process, which is determined by retention and penetration parameters (PAES, 1991).…”

Section: Introductionmentioning

confidence: 99%

Preservative Treatment of Fence Posts Evaluation Through Photocolorimetry Segmentation Performance

et al. 2016

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-The research object was evaluating the quality of preserving treatment of Eucalyptus sp. fence posts by the sap substitution method and comparing the penetration through the traditional and photocolorimetry segmentation methods. The fence posts, 2,0 meters long and with a diameter between 8 and 12 cm, were exposed to 2, 3 and 4% concentrations of CCB based-product active ingredients for 10 days. The penetrations were analyzed using two methodologies, one by the Image Pro Plus 4.5 software, using photocolorimetry segmentation method performance, and by analyzing the product retention in four positions of the treated fence posts. The treatment submitted pieces attained low penetration and, thus, the retention values were less than the required for direct contact with the ground. On the other hand, the proposed photocolorimetry segmentation methodology was efficient and could be an alternative to determine a more precise and fast penetration.Keywords: Eucalyptus; Sap substitution; Penetration. AVALIAÇÃO DO TRATAMENTO PRESERVATIVO DE MOIRÕES POR MEIO DE DESEMPENHO DE SEGMENTAÇÃO FOTOCOLORIMÉTRICARESUMO -O objetivo da pesquisa foi avaliar a qualidade do tratamento preservativo de moirões de Eucalyptus sp. pelo método de substituição da seiva e comparar a penetração por meio dos métodos tradicionais e de segmentação fotocolorimétrica. Os moirões, com comprimento de 2,0 metros e diâmetro entre 8 e 12 cm, foram expostos às concentrações de 2; 3 e 4% de ingredientes ativos de produto a base de CCB, durante 10 dias. Foram analisadas as penetrações por duas metodologias, sendo uma pelo software Image Pro Plus 4.5, por meio de desempenho de segmentação fotocolorimétrica, e analisadas a retenção do produto em quatro posições nos moirões tratados. As peças submetidas aos tratamentos obtiveram baixa penetração, e por consequência, os valores de retenção foram inferiores do exigido para o contato direto com o solo. Por outro lado, a metodologia proposta por desempenho de segmentação fotocolorimétrica mostrou-se eficiente e, pode ser uma alternativa para determinar a penetração de forma mais precisa e ágil.Palavras-chave: Eucalipto; Substituição de seiva; Penetração.

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Efeito da Concentração na Ascensão de Soluções Preservativas Preparadas com CCB em Moirões de Eucalyptus

Cited by 6 publications

References 3 publications

CCB Retention and Penetration in Eucalyptus Fence Posts in Function of Condition of Preservative Treatment

CCB Retention and Penetration in Eucalyptus Fence Posts in Function of Condition of Preservative Treatment

Influências do Diâmetro e Umidade da Madeira na Qualidade do Tratamento Preservativo

Preservative Treatment of Fence Posts Evaluation Through Photocolorimetry Segmentation Performance

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