< Retour BUBINGA (Guibourtia demeusei) Version imprimable
BUBINGA (Guibourtia demeusei)
Nom commercial
Bubinga
Nom scientifique (avec auteur)
Guibourtia demeusei J.Leon.
Famille
LEGUMINOSAE
Noms communs (pays)
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
Synonymes du nom scientifique (avec auteurs)
Copaifera laurentii De Wild.; Copaifera demeusei Harms
DESCRIPTION DE L'ARBRE
Description botanique
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 naturel
Guibourtia demeusei occurs along the coastal area of tropical Africa.
Répartition naturelle
West Africa and in tropical Central Africa.
IDENTIFICATION DU BOIS
Description anatomique du bois
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.
Disponibilité
Statut CITES
Unrestricted
DESCRIPTION GÉNÉRALE DU BOIS
Teinte
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.
Index de Teinte (1 = Noir, 7 = Jaune clair)
4
Grain
Straight or slightly interlocked, sometimes with an influence on further processing operations.
Texture
This species is reported to have a fine to medium texture.
Luster
This wood is commonly of low luster.
Durabilité naturelle
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.
Index de durabilité naturelle (1 = Très élevée, 7 = Très faible)
1
Tensions internes de croissance
For this species no growth stresses are reported.
Teneur en silice
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
Résistance à l'imprégnation
Nearly impossible to treat with a too much low penetration of the preservative substances.
PROPRIÉTÉS PHYSIQUES DU BOIS
Densité basale ou gravité spécifique (poids anhydre/vol. saturé) (g/cm³)
0.92
Densité sèche à l'air (poids et volume à 12%TH) (g/cm³)
1.07
Retrait tangentiel total (saturé à 0%TH) (%)
10.3
Retrait radial total (saturé à 0%TH) (%)
5.1
Défauts dus au séchage
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.
Calendrier de séchage en séchoir recommandé
FR-9
Ratio de stabilité dimensionnelle (% retrait tangentiel total/% retrait radial total)
2.0
Calendrier de séchage en séchoir
http://www.tropicaltimber.info/wp-content/uploads/2015/09/KD_French.pdf
PROPRIÉTÉS CHIMIQUES DU BOIS
PROPRIÉTÉS MÉCANIQUES DU BOIS
Résistance à la flexion (module de rupture_MOR) 12%TH (kgf/cm²)
1800
Rigidité (module d'élasticité_ MOE) 12%TH (kgf/cm²)
259570
Résistance à la compression parallèle à la fibre 12%TH (kgf/cm²)
888
Résistance à la compression perpendiculaire à la fibre 12%TH (kgf/cm²)
134
Résistance au cisaillement (radial) 12%TH (kgf/cm²)
178
Dureté Janka (latérale) 12%TH (kgf)
1448
Dureté Janka (extrémités) 12%TH (kgf)
1404
OUVRABILITÉ
Sciage
Sawing of this species requires powerful equipment.
Coupe de placage de déroulage
Suitable for slicing.
Placage tranche
Suitable for slicing.
Effet d'émoussement
Moderate blunting effect; stellited blades for sawing and carbide tools for machining are advised.
Usinage
It needs powerful tools for processing. Possible difficulties caused by interlocked grain are reported.
Rabotage
Moderately easy; tools must be cautiously sharpened.
Moulurage
Easy; no particular problems.
Tournage
30
Perçage
Easy; no particular problems.
Mortaisage
Easy; no particular problems.
Clouage
Pre-boring is necessary.
Collage
Difficult to glue because of the extracts content.
Ponçage
Easy to perform; it gives good results.
Polissage
Can be polished without surface preparation.
Compatibilité avec outils manuels
Working with hand tools is difficult.
UTILISATIONS
UTILISATIONS FINALES (RÉSUMÉ)
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
MEUBLES ET M. DE RANGEMENT
- 10 - Silica in Timbers
Pouters
- 11 - Prospect: The wood database
Solives
- 12 - Tropical timbers of the world. Part I-Tropical American Species
Planches
- 13 - Dry kiln schedules for commercial woods. Temperate and tropical. Section III. Latin American (Mexico, Central, and South America) Woods–Conventional Temperatures
Planchers
- 14 - Handbook of Hardwoods
Parquets
- 15 - Empire Timbers
Cadres
- 16 - Woods of the World
Marches
- 17 - Tree Conservation Database
Panneaux
- 18 - W3TROPICOS Missouri Botanical Garden
Accessoires en bois
- 19 - Silica in Timbers
MEUBLES ET M. DE RANGEMENT
- 21 - Tropical timbers of the world. Part III-Southeast Asian and Oceanian Species.
Meubles luxe
- 22 - Dry kiln schedules for commercial woods. Temperate and tropical. Section IV-Asian and Oceanian Woods
Armoires
- 24 - Empire Timbers
PANNEAUX ET PLACAGE
- 25 - Directory of Timber Trade Malaysia
Placage tranché
- 28 - Ministry of Agriculture, Fisheries & Forest of Fiji
Tournage
- 30 - Embassy of Honduras in Japan
Ornements
- 31 - Embassy of Colombia in Japan
Ornements
- 32 - Embassy of Cote d`Ivoire in Japan
Manches de couverts
- 33 - Embassy of Gabon in Japan
Formes à chaussures
- 34 - Embassy of Indonesia in Japan
Carros_camion
- 53 - Timbers of the New World
Wagons
- 54 - Bulletin of the Government Forest Experiment Station N.157: Identification of Tropical Woods
Artisanat
- 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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