|
Registro Completo |
|
Biblioteca(s): |
Embrapa Pantanal. |
|
Data corrente: |
20/12/1995 |
|
Data da última atualização: |
27/03/2015 |
|
Autoria: |
CHUDNOFF, M.; GOYTIA, E. |
|
Afiliação: |
Institue of Tropical Forestry (Rio Piedras, Puerto Rico). |
|
Título: |
The effect of incising on drying, treatability and bending strenght of posts. |
|
Ano de publicação: |
1967 |
|
Fonte/Imprenta: |
Rio Piedras: USDA. Forest Service. Institute of Tropical Forestry, 1967. |
|
Páginas: |
20p. |
|
Série: |
(USDA. Forest Service. Research Paper ITF-5). |
|
Idioma: |
Inglês |
|
Conteúdo: |
The forest lands of Puerto Rico contain at least 50 species available in some quantity for fence posts. Because they are generally scattered in mixed stands, segregation according to species or treatability groups prior to the application of wood preservatives is not practical. Groudline incising together with a single universal hot-and-cold bath schedule was tested as a practical method of treating batches of mixed species. A brief description of a commercially feasible post incising machine is given. This machine was used to prepare test material to determine the effect of incising on: 1) air drying time, 2) treatability, and 3) bending strength of small diameter posts. Differences in air drying time to reach a moisture content of 25 percent for incised and non-incised post posts were not significant. A comparison of retention and penetration of preserving oils, applied by a 2 hour - 2 hour thermal process, was made of posts incised while green, incised after air drying, and non-incised controls. Only differences between the incised and non-incised groups were significant. Four species out of 20 tested in the incised group had marginal treatments as compared to 17 species in the non-incised group that had non-acceptable treatments. Cantilever beam tests show a 15 to 25 percent reduction in bending strength due to incising. This is considered tolerable compared to benefits gained by the preservative concentration at the vulnerable groundline due to incising. |
|
Palavras-Chave: |
Forest; Poste de cerca; Tree. |
|
Thesagro: |
Árvore; Floresta; Tratamento. |
|
Categoria do assunto: |
-- |
|
Marc: |
LEADER 02095nam a2200217 a 4500
001 1786887
005 2015-03-27
008 1967 bl uuuu u0uu1 u #d
100 1 $aCHUDNOFF, M.
245 $aThe effect of incising on drying, treatability and bending strenght of posts.
260 $aRio Piedras: USDA. Forest Service. Institute of Tropical Forestry$c1967
300 $a20p.
490 $a(USDA. Forest Service. Research Paper ITF-5).
520 $aThe forest lands of Puerto Rico contain at least 50 species available in some quantity for fence posts. Because they are generally scattered in mixed stands, segregation according to species or treatability groups prior to the application of wood preservatives is not practical. Groudline incising together with a single universal hot-and-cold bath schedule was tested as a practical method of treating batches of mixed species. A brief description of a commercially feasible post incising machine is given. This machine was used to prepare test material to determine the effect of incising on: 1) air drying time, 2) treatability, and 3) bending strength of small diameter posts. Differences in air drying time to reach a moisture content of 25 percent for incised and non-incised post posts were not significant. A comparison of retention and penetration of preserving oils, applied by a 2 hour - 2 hour thermal process, was made of posts incised while green, incised after air drying, and non-incised controls. Only differences between the incised and non-incised groups were significant. Four species out of 20 tested in the incised group had marginal treatments as compared to 17 species in the non-incised group that had non-acceptable treatments. Cantilever beam tests show a 15 to 25 percent reduction in bending strength due to incising. This is considered tolerable compared to benefits gained by the preservative concentration at the vulnerable groundline due to incising.
650 $aÁrvore
650 $aFloresta
650 $aTratamento
653 $aForest
653 $aPoste de cerca
653 $aTree
700 1 $aGOYTIA, E.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Pantanal (CPAP) |
|
