EFFECT OF ARTIFICIAL WEATHERING ON PHYSICAL AND MECHANICAL PROPERTIES OF WOOD

IF 0.6 4区农林科学 Q4 FORESTRY

Revista Arvore Pub Date : 2021-01-01 DOI:10.1590/1806-908820210000034

V. Aquino, M. S. Bertolini, C. A. G. D. Morais, Tiago Hendrigo de Almeida, Diego Henrique Almeida, F. Lahr, A. Christoforo

{"title":"EFFECT OF ARTIFICIAL WEATHERING ON PHYSICAL AND MECHANICAL PROPERTIES OF WOOD","authors":"V. Aquino, M. S. Bertolini, C. A. G. D. Morais, Tiago Hendrigo de Almeida, Diego Henrique Almeida, F. Lahr, A. Christoforo","doi":"10.1590/1806-908820210000034","DOIUrl":null,"url":null,"abstract":"ABSTRACT When wood is exposed outdoors, a combination of chemical and mechanical factors and solar radiation contribute to what is described as weathering, being the main degradation agent in this environment. This paper aims to investigate the effect of artificial weathering on mechanical and physical properties of Eucalyptus sp. and Cupiúba (Goupia glabra) woods simulating natural weathering effects. Samples were aged in UV radiation chamber with humidity and temperature control for 100, 200, 300 and 400 hours, considering aging cycles according to ASTM G154 (2006). Wood properties investigated were Conventional value of strength in static bending (fM), Modulus of elasticity in static bending (EM), strength in compression parallel to grain (fc0) and Janka Hardness (fH) according to ABNT NBT 7190 (1997). Effects of artificial weathering on wood properties were evaluated by statistical analysis at 5% significance level. Most of the wood properties investigated did not present significant changes with the aging performed, however, it was noted a decrease in the absolute values of the wood properties absolute values during the aging process. Only fH of Cupiúba wood aged for 100 and 200 hours presented significative performance loss at the significance level considered, which can be related to changes on the wood surface due to weathering exposure.","PeriodicalId":21214,"journal":{"name":"Revista Arvore","volume":"1 1","pages":""},"PeriodicalIF":0.6000,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Revista Arvore","FirstCategoryId":"97","ListUrlMain":"https://doi.org/10.1590/1806-908820210000034","RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"FORESTRY","Score":null,"Total":0}

引用次数: 1

Abstract

ABSTRACT When wood is exposed outdoors, a combination of chemical and mechanical factors and solar radiation contribute to what is described as weathering, being the main degradation agent in this environment. This paper aims to investigate the effect of artificial weathering on mechanical and physical properties of Eucalyptus sp. and Cupiúba (Goupia glabra) woods simulating natural weathering effects. Samples were aged in UV radiation chamber with humidity and temperature control for 100, 200, 300 and 400 hours, considering aging cycles according to ASTM G154 (2006). Wood properties investigated were Conventional value of strength in static bending (fM), Modulus of elasticity in static bending (EM), strength in compression parallel to grain (fc0) and Janka Hardness (fH) according to ABNT NBT 7190 (1997). Effects of artificial weathering on wood properties were evaluated by statistical analysis at 5% significance level. Most of the wood properties investigated did not present significant changes with the aging performed, however, it was noted a decrease in the absolute values of the wood properties absolute values during the aging process. Only fH of Cupiúba wood aged for 100 and 200 hours presented significative performance loss at the significance level considered, which can be related to changes on the wood surface due to weathering exposure.

查看原文本刊更多论文

人工风化对木材物理力学性能的影响

当木材暴露在户外时，化学和机械因素以及太阳辐射的结合会导致所谓的风化，这是这种环境中的主要降解因素。本文旨在研究人工风化对桉树(Eucalyptus sp.)和Cupiúba (Goupia glabra)木材模拟自然风化的力学和物理性能的影响。根据ASTM G154(2006)的老化周期，将样品在湿度和温度控制的紫外线辐射室中老化100、200、300和400小时。根据ABNT NBT 7190(1997)，木材的静态弯曲强度常规值(fM)，静态弯曲弹性模量(EM)，平行于颗粒的压缩强度(f0)和Janka硬度(fH)。人工风化对木材性能的影响采用5%显著性水平的统计分析。大多数木材的性能在老化过程中没有明显的变化，但在老化过程中，木材性能的绝对值有所下降。在考虑的显著性水平上，只有老化100和200小时的Cupiúba木材的fH出现了显著的性能损失，这可能与木材表面因风化暴露而发生的变化有关。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Revista Arvore FORESTRY-

CiteScore

1.00

自引率

0.00%

发文量

审稿时长

4-8 weeks

期刊介绍： A Revista Árvore é um veículo de comunicação científica da Sociedade de Investigações Florestais – SIF. O jornal é de acesso gratuito, revisado por pares, que publica bimestralmente trabalhos científicos originais no campo da Ciência Florestal. As áreas temáticas para publicação são: Ambiência e Conservação da Natureza, Manejo Florestal, Silvicultura e Tecnologia da Madeira e Utilização de Produtos Florestais. A política editorial visa manter alta conduta ética em relação à publicação e aos seus funcionários, rigor na qualidade dos artigos científicos, seleção de revisores qualificados, respeito profissional aos autores e processo de tomada de decisão imparcial. A Revista Árvore publica artigos apenas em inglês. Artigos de revisão podem ser publicados se houver uma discussão relevante resumindo o estado da arte sobre o assunto. A revisão estrita da literatura não é aceita.