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BUBINGA (Guibourtia demeusei)
Nome comercial
Bubinga
Nome científico (autor)
Guibourtia demeusei J.Leon.
Família
LEGUMINOSAE
Nomes comuns
Essingang (Cameroon); Binbinga (Cameroon); Waku; Ovang; Okweni; Ngulupang; Mutenye; Lusase; Lukunfu; Lianu; Kasasesase; Irun-nduk; Gum copal; Gabon kevazingo; Essingang; Eban; Cameroons gum copal; Buvenga; Ebana (Gabon); Akume (United States of America); Waka (Zaire); Kevazingo (Gabon); Oveng (Equatorial Guinea); Bubinga
Nome científico sinônimo (autor
Copaifera laurentii De Wild.; Copaifera demeusei Harms
DESCRIÇÃO DA ÁRVORE
Descrição botânica
The tree reaches a height of 25 to 30 m. The bole is irregular, up to 20 m in length. The trunk diameter attains 100 cm and is usually buttressed. Log is banned for international trading.(Cameroon)
Habitat natural
Guibourtia demeusei occurs along the coastal area of tropical Africa.
Distribuição natural
West Africa and in tropical Central Africa.
IDENTIFICAÇÃO DA MADEIRA
Descrição anatômica da madeira (macro e micro)
Wood diffuse porous. Occasionally vessels exclusively solitary (over 90%). Tangential diameter of vessel lumina 100 to 150 micras (small). Vestured pits. Vessels per mm2 6 to 10 (medium). Simple perforation plates. Vessel-ray pits similar to intervessel pits in Axial parenchyma in marginal or in seemingly marginal bands. Paratracheal axial parenchyma scanty and/or vasicentric. Axial parenchyma lozenge-aliform. Axial parenchyma aliform. Prismatic crystals in chambered axial parenchyma cells and/or in fibers. 5 to 8 ce 4 to 10 rays per mm (medium). Rays non-storied. Larger rays more than 4 seriate. Homogeneous rays and/or sub-homogeneous rays (all ray cells procumbent). Non-septate fibers. Fibers with simple to minutely bordered pits.
DISPONIBILIDADE
Situação CITES sobre a proteção
Unrestricted
DESCRIÇÃO GERAL DA MADEIRA
Cor
The sapwood is whitish, it has a thickness of 2 to 8 cm. The heartwood is red-brown or pinkish brown with purple veins, it is clearly demarcated. The silver figure is fine.
Indice de cor
4
Grã
Straight or slightly interlocked, sometimes with an influence on further processing operations.
Veios ou desenhos na superfície
This species is reported to have a fine to medium texture.
Brilho
This wood is commonly of low luster.
DURABILIDADE NATURAL
Durable to decay; this species can be utilized without preservative treatment for exterior joinery or similar uses. Resistant to termites attack. Heartwood is resistant to Lyctus attacks.
Indice de durabilidade natural
1
Tensões internas do crescimento
For this species no growth stresses are reported.
Conteúdo de sílica
Silica Content: This timber is reported to have a negligible silica content. Silica contents over 0.05% may affect wood processing. Silica Value: 0.01
Tratamento preservativo
Nearly impossible to treat with a too much low penetration of the preservative substances.
PROPRIEDADES FÍSICAS DA MADEIRA
Densidade básica (Peso seco/Volume saturado) (g/cm³)
0.92
Densidade seca ao ar 12% (g/cm³)
1.07
Contração Tangencial Total (Saturado até peso seco) (%)
10.3
Contração Radial Total (Saturado até peso seco) (%)
5.1
Defeitos causados pela secagem
Ease of Drying: Drying is very slow and difficult to perform; defects are frequent. Drying Defects: Risks of checks and distortions. Kiln Schedules: The kiln schedule has been tested.
Programa de secagem recomendável
FR-9
Estabilidade dimensional (Contração Tangencial Total %/Contração Radial Total %)
2.0
Programa de secagem detalhado
http://www.tropicaltimber.info/wp-content/uploads/2015/09/KD_French.pdf
PROPRIEDADES QUÍMICAS DA MADEIRA
PROPRIEDADES MECÂNICAS DA MADEIRA
Resistência a flexão a 12% (Módulo de ruptura) (kgf/cm²)
1800
Flexão Estática a 12% (Módulo de elasticidade) (kgf/cm²)
259570
Resistência a compressão paralela as fibras a 12% (kgf/cm²)
888
Resistência a compressão perpendicular as fibras a 12% (kgf/cm²)
134
Cisalhamento radial a 12% (kgf/cm²)
178
Dureza Janka a 12% (perpendicular) (kgf)
1448
Dureza Janka a 12% (paralela) (kgf)
1404
TRABALHABILIDADE
Serrar ou Cortar
Sawing of this species requires powerful equipment.
Desdobro da tora em torno para lâminas
Suitable for slicing.
Desdobro da tora em faqueadeira para lâminas
Suitable for slicing.
Desgaste de ferramentas
Moderate blunting effect; stellited blades for sawing and carbide tools for machining are advised.
Aspectos do processamento em máquinas
It needs powerful tools for processing. Possible difficulties caused by interlocked grain are reported.
Aplainamento
Moderately easy; tools must be cautiously sharpened.
Aplicação para molduras
Easy; no particular problems.
Torneamento
30
Furação
Easy; no particular problems.
Fresagem_ranhura_canais
Easy; no particular problems.
Comportamento na aplicação de pregos
Pre-boring is necessary.
Colagem
Difficult to glue because of the extracts content.
Lixamento
Easy to perform; it gives good results.
Operação de lustre da superfície (brilho)
Can be polished without surface preparation.
Trabalhabilidade com ferramentas manuais
Working with hand tools is difficult.
USOS FINAIS RELATADOS
USOS FINAIS (RESUMO)
HOUSING GENERAL, beams, joists, boards, flooring, parquet, frames, steps, panelling, fittings, FURNITURE AND CABINETS, luxury furniture, cabinets, PLYWOOD AND VENEER, Decorative veneer, TURNING, ornaments, turned furniture, cutlery, lasts, CONTAINERS, truck bodies, truck flooring, OTHER AND MUSICAL INSTRUMENTS, handicrafts
CASAS
- 10 - Silica in Timbers
Vigas
- 11 - Prospect: The wood database
Vigotas
- 12 - Tropical timbers of the world. Part I-Tropical American Species
Tábuas
- 13 - Dry kiln schedules for commercial woods. Temperate and tropical. Section III. Latin American (Mexico, Central, and South America) Woods–Conventional Temperatures
Pisos
- 14 - Handbook of Hardwoods
Parquets
- 15 - Empire Timbers
Marcos de portas
- 16 - Woods of the World
Degraus de escada
- 17 - Tree Conservation Database
Painéis
- 18 - W3TROPICOS Missouri Botanical Garden
Acessórios de madeira
- 19 - Silica in Timbers
MÓVEIS GABINETES
- 21 - Tropical timbers of the world. Part III-Southeast Asian and Oceanian Species.
Móveis finos
- 22 - Dry kiln schedules for commercial woods. Temperate and tropical. Section IV-Asian and Oceanian Woods
Gabinetes
- 24 - Empire Timbers
CHAPAS
- 25 - Directory of Timber Trade Malaysia
Lâminas decorativas
- 28 - Ministry of Agriculture, Fisheries & Forest of Fiji
Torneamento
- 30 - Embassy of Honduras in Japan
Artigos torneados
- 31 - Embassy of Colombia in Japan
Artigos torneados
- 32 - Embassy of Cote d`Ivoire in Japan
Cabo de faca
- 33 - Embassy of Gabon in Japan
Formas de sapateiro
- 34 - Embassy of Indonesia in Japan
Carroceria de caminhão
- 53 - Timbers of the New World
Pisos para assoalho de trem
- 54 - Bulletin of the Government Forest Experiment Station N.157: Identification of Tropical Woods
Artesanato
- 66 - Maderas latinoamericanas. VII. Caracteristicas anatomicas. propiedades fisicomecanicas, de secado, y tratabilidad de la madera juvenil de Cordia alliodora (Ruiz & Pav. Oken.)
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