Surface deterioration of five amazonian wood exposed to natural weathering
Wood in civil construction has restrictions regarding its external use due to the actions of natural weathering, which can represent a real risk because they modify the characteristics of this material. This study aimed to evaluate the superficial deterioration of Trattinnickia rhoifolia (amescla),...
| Main Authors: | , , , , , , |
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| Format: | Online |
| Sprog: | por spa |
| Udgivet: |
Instituto de Ecología, A.C.
2022
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| Online adgang: | https://myb.ojs.inecol.mx/index.php/myb/article/view/2405 |
| _version_ | 1799769434452131840 |
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| author | Silva, Eldalisley dos Santos Bonfatti Júnior, Eraldo Antonio a Silva, Gabriel Afonso de Oliveir Curvo, Kezia Rage Stangerlin, Diego Martins Melo, Rafael Rodolfo de Souza , Adilson Pacheco de |
| author_facet | Silva, Eldalisley dos Santos Bonfatti Júnior, Eraldo Antonio a Silva, Gabriel Afonso de Oliveir Curvo, Kezia Rage Stangerlin, Diego Martins Melo, Rafael Rodolfo de Souza , Adilson Pacheco de |
| author_sort | Silva, Eldalisley dos Santos |
| collection | MYB |
| description | Wood in civil construction has restrictions regarding its external use due to the actions of natural weathering, which can represent a real risk because they modify the characteristics of this material. This study aimed to evaluate the superficial deterioration of Trattinnickia rhoifolia (amescla), Parkia pendula (angelim), Erisma uncinatum (cedar), Apuleia leiocarpa (garapeira), and Mezilaurus itauba (itaúba) wood specimens exposed to natural weathering. For this purpose, wood samples were submitted to outdoor exposure on a metal platform, without contact with the ground, for 360 days. Every 60 days, the wood surface was characterized by colorimetry (L*, a*, b*, C*, h, and ΔE), roughness (Ra, Rz, and Rt), and hardness Rockwell. A darkened surface (grayish color) on the wood was observed after natural weathering, indicated by the decrease in the colorimetric parameters L*, a*, and b*. E. uncinatum wood presented the lowest values of the total color change (ΔE). In addition to the discoloration, weathered wood presented the highest values of surface roughness and the lowest values of Rockwell hardness due to the occurrence of surface cracks. A. leiocarpa and M. itauba woods presented greater stability of roughness and Rockwell hardness throughout the outdoor exposure. |
| format | Online |
| id | oai:oai.myb.ojs.inecol.mx:article-2405 |
| institution | Madera y Bosques |
| language | por spa |
| publishDate | 2022 |
| publisher | Instituto de Ecología, A.C. |
| record_format | ojs |
| spelling | oai:oai.myb.ojs.inecol.mx:article-24052023-03-04T05:28:46Z Surface deterioration of five amazonian wood exposed to natural weathering Deterioração da superfície de cinco madeiras amazônicas expostas ao intemperismo natural Silva, Eldalisley dos Santos Bonfatti Júnior, Eraldo Antonio a Silva, Gabriel Afonso de Oliveir Curvo, Kezia Rage Stangerlin, Diego Martins Melo, Rafael Rodolfo de Souza , Adilson Pacheco de colorimetria dureza Rockwell fotodeterioração qualidade da madeira rugosidade colorimetry Rockwell hardness photodegradation wood quality roughness Wood in civil construction has restrictions regarding its external use due to the actions of natural weathering, which can represent a real risk because they modify the characteristics of this material. This study aimed to evaluate the superficial deterioration of Trattinnickia rhoifolia (amescla), Parkia pendula (angelim), Erisma uncinatum (cedar), Apuleia leiocarpa (garapeira), and Mezilaurus itauba (itaúba) wood specimens exposed to natural weathering. For this purpose, wood samples were submitted to outdoor exposure on a metal platform, without contact with the ground, for 360 days. Every 60 days, the wood surface was characterized by colorimetry (L*, a*, b*, C*, h, and ΔE), roughness (Ra, Rz, and Rt), and hardness Rockwell. A darkened surface (grayish color) on the wood was observed after natural weathering, indicated by the decrease in the colorimetric parameters L*, a*, and b*. E. uncinatum wood presented the lowest values of the total color change (ΔE). In addition to the discoloration, weathered wood presented the highest values of surface roughness and the lowest values of Rockwell hardness due to the occurrence of surface cracks. A. leiocarpa and M. itauba woods presented greater stability of roughness and Rockwell hardness throughout the outdoor exposure. A madeira na construção civil apresenta restrições quanto ao seu uso externo devido às ações do intemperismo natural, que podem representar um risco real pois modificam as características desse material. Neste estudo objetivou-se avaliar a deterioração da superfície das madeiras de Trattinnickia rhoifolia (Amescla), Parkia pendula (Angelim), Erisma uncinatum (Cedro), Apuleia leiocarpa (Garapeira) e Mezilaurus itauba (Itaúba) expostas ao intemperismo natural. Para tanto, amostras de madeira foram expostas às intempéries em uma plataforma metálica, sem contato com o solo, durante 360 dias. A cada 60 dias realizou-se a caracterização da superfície das madeiras por meio da colorimetria (L*, a*, b*, C*, h e ∆E), rugosidade (Ra, Rz e Rt) e dureza Rockwell. A exposição ao intemperismo natural tornou a superfície das madeiras mais escurecidas (coloração acinzentada), resultante da redução dos parâmetros colorimétricos L*, a* e b*. A madeira de E. uncinatum apresentou os menores valores de variação total da cor (∆E). Além da descoloração, as madeiras intemperizadas tornaram-se mais rugosas e com menor dureza Rockwell, devido à formação de fissuras superficiais. As madeiras de A. leiocarpa e M. itauba apresentaram maior estabilidade da rugosidade e da dureza Rockwell durante o período de exposição às intempéries. Instituto de Ecología, A.C. 2022-12-15 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Artículo evaluado por pares application/pdf text/xml https://myb.ojs.inecol.mx/index.php/myb/article/view/2405 10.21829/myb.2022.2822405 Madera y Bosques; Vol. 28 No. 2 (2022): Summer 2022; e2822405 Madera y Bosques; Vol. 28 Núm. 2 (2022): Verano 2022; e2822405 2448-7597 1405-0471 por spa https://myb.ojs.inecol.mx/index.php/myb/article/view/2405/2418 https://myb.ojs.inecol.mx/index.php/myb/article/view/2405/2439 10.21829/myb.2020.261849 10.21829/myb.2019.253929 http://creativecommons.org/licenses/by-nc-sa/4.0 |
| spellingShingle | Silva, Eldalisley dos Santos Bonfatti Júnior, Eraldo Antonio a Silva, Gabriel Afonso de Oliveir Curvo, Kezia Rage Stangerlin, Diego Martins Melo, Rafael Rodolfo de Souza , Adilson Pacheco de Surface deterioration of five amazonian wood exposed to natural weathering |
| title | Surface deterioration of five amazonian wood exposed to natural weathering |
| title_full | Surface deterioration of five amazonian wood exposed to natural weathering |
| title_fullStr | Surface deterioration of five amazonian wood exposed to natural weathering |
| title_full_unstemmed | Surface deterioration of five amazonian wood exposed to natural weathering |
| title_short | Surface deterioration of five amazonian wood exposed to natural weathering |
| title_sort | surface deterioration of five amazonian wood exposed to natural weathering |
| url | https://myb.ojs.inecol.mx/index.php/myb/article/view/2405 |
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