Natural durability of five tropical wood species in field decay tests

Felipe Gomes Batista ^[3] ; Rafael Rodolfo De Melo ^[4] ; Dayane Targino de Medeiros ^[1] ; Pedro Jorge Goes Lopes ^[2] ; Darci Alberto Gatto ^[5]
1. [1] Universidade Federal Rural do Semi-Árido
  
  Universidade Federal Rural do Semi-Árido
  
  Brasil
2. [2] Universidade Federal de Santa Maria
  
  Universidade Federal de Santa Maria
  
  Brasil
3. [3] Universidade Federal do Rio Grande do Norte, Escola Agrícola de Jundiaí, Macaíba, Brazil // Universidade Federal de Lavras, Lavras, Brazil
4. [4] Universidade Federal do Rio Grande do Norte, Escola Agrícola de Jundiaí, Macaíba, Brazil // Universidade Federal Rural do Semi-Árido, Departamento de Ciências Agronômicas e Florestais, Mossoró, Brazil
5. [5] Universidade Federal de Santa Maria, Departamento de Ciências Florestais, Santa Maria, 21 Brazil // Universidade Federal de Pelotas, Centro de Engenharias, Pelotas, Brazil
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Localización: Maderas: Ciencia y tecnología, ISSN 0717-3644, ISSN-e 0718-221X, Vol. 24, Nº. 1, 2022
Idioma: inglés
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Resumen
- Measuring the natural resistance of wood is fundamental for proper use. The natural durability of five tropical wood species was investigated by field decay testing during exposure for 360 days. Wood logs (length of 0,5 m; diameter of 8 cm - 12 cm) were used in this study. The mass loss and decay index were calculated and visual analysis during the exposure time was performed for all samples. The samples presented evidence of two different groups concerning natural durability. The species in the first group (Mimosa caesalpiniifolia, Mimosa ophthalmocentra, and Mimosa tenuiflora) showed the highest resistance to biodeterioration, better or similar performance compared to treated eucalyptus wood (as control). The other group (Aspidosperma pyrifolium and Cordia oncocalyx) had lower natural resistance in outdoor service, being more susceptible to decay. In general, the wood of the first group is indicated for outdoor uses that require medium or prolonged exposure, such as timber stakes and fence posts