ABURA/BAHIA (Hallea ciliata)
Nom commercial
Abura/Bahia
Nom scientifique (avec auteur)
Hallea ciliata Aubrev. et Pellegr.
Famille
RUBIACEAE
Noms communs (pays)
Mboi (Sierra Leone); Elolom (Cameroon); Nzingu (Zambia); Bahia (France); Nzingu (Zaire); Nzingu (Uganda); Mvuku (Zaire); Mivuko (Angola); Vuku (Congo); Elelom nzam (Gabon); Elelon (Equatorial Guinea); Elolom Elolom (Cameroon); Abura (Nigeria); Subaha (Ghana); Bahia (Côte d`Ivoire)
Synonymes du nom scientifique (avec auteurs)
Mitragyna ciliata Aubrev. & Pellegr.
DESCRIPTION DE L'ARBRE
Description botanique
The tree reaches a height of 30 m. The bole may be 20 m in length or more, usually free from buttresses, straight and clear. The trunk diameter attains 80 to 150 cm.
Habitat naturel
Hallea ciliata is a gregarious species found in freshwater swamps in rain forests, extending into coastal, semi-deciduous formations. Often reported in mixed stands.
IDENTIFICATION DU BOIS
Description anatomique du bois
Wood diffuse porous. Occasionally vessels exclusively solitary (over 90%). Vestured pits. Vessels per mm2 more than 20 (very abundant). Simple perforation plates. Vessel-ray pits similar to intervessel pits in size and shape. Intervessel pits medium, 7 to 10 mi Apotracheal axial parenchyma diffuse and/or diffuse in aggregates. Non-crystals in axial parenchyma cells. 5 to 8 cells per parenchyma strand. Rays more than 10 per mm (abundant). Rays non-storied. Rays 1 to 4 seriate. Occasionally silica bodies in the ray cells. Heterogeneous rays and/or multiseriate heterogeneous rays. Non-septate fibers. Fibers with distinctly bordered pits.
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Vue macroscopique du bois (plan radiale)
-
Vue microscopique d'une section transversale du bois
Disponibilité
Statut CITES
Unrestricted
DESCRIPTION GÉNÉRALE DU BOIS
Teinte
The heartwood is pink beige to pinkish brown, it is not clearly demarcated. The silver figure is fine.
Index de Teinte (1 = Noir, 7 = Jaune clair)
5
Grain
Straight; grain has no particular influence on drying, machining and finishing qualities.
Texture
This species is usually reported to have a fine texture.
Luster
It is reported to be low in luster.
Durabilité naturelle
Not durable; important risks of decay attacks at any processing step, from logs up to final products. It must receive preservative treatment. Sensible to termites attack. Heartwood is sensible to Lyctus attacks.
Index de durabilité naturelle (1 = Très élevée, 7 = Très faible)
5
Tensions internes de croissance
Residual stresses are reported to be absent.
Teneur en silice
Silica Content: Negligible content of silica is reported. Amounts over 0.05% may affect wood processing. Silica Value: 0.04
Résistance à l'imprégnation
Moderately easy to treat with a partial penetration of the preservative products.
PROPRIÉTÉS PHYSIQUES DU BOIS
Densité basale ou gravité spécifique (poids anhydre/vol. saturé) (g/cm³)
0.52
Densité sèche à l'air (poids et volume à 12%TH) (g/cm³)
0.57
Retrait tangentiel total (saturé à 0%TH) (%)
8.7
Retrait radial total (saturé à 0%TH) (%)
4.1
Défauts dus au séchage
Ease of Drying: Air drying is reported as fairly rapid. Boards of 13 mm and 38 mm thick take respectively 2.5 months and 3.5 months. Drying Defects: The wood seasons with negligible degrade except for fungal and insect attacks.
Calendrier de séchage en séchoir recommandé
FR-3
Ratio de stabilité dimensionnelle (% retrait tangentiel total/% retrait radial total)
2.1
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)
730
Rigidité (module d'élasticité_ MOE) 12%TH (kgf/cm²)
97548
Résistance à la compression parallèle à la fibre 12%TH (kgf/cm²)
459
Résistance à la compression perpendiculaire à la fibre 12%TH (kgf/cm²)
55
Résistance au cisaillement (radial) 12%TH (kgf/cm²)
69
Dureté Janka (latérale) 12%TH (kgf)
395
Dureté Janka (extrémités) 12%TH (kgf)
499
OUVRABILITÉ
Sciage
It is easy to saw.
Coupe de placage de déroulage
Suitable for slicing, also suitable for peeling if treated.
Placage tranche
Suitable for slicing, also suitable for peeling if treated.
Effet d'émoussement
Severe blunting effect; stellited blades for sawing and carbide tools for machining are recommended.
Usinage
Possible difficulties caused by interlocked grain are reported.
Rabotage
Easy; no particular problems.
Moulurage
Moderately easy; tools must be cautiously sharpened.
Tournage
30
Perçage
Moderately easy; tools must be cautiously sharpened.
Mortaisage
Moderately easy; tools must be cautiously sharpened.
Clouage
No particular problem.
Collage
Glues well if basic gluing technical rules are followed.
Ponçage
Easy to perform; it gives good results.
Polissage
Can be polished without surface preparation.
Cintrage à la vapeur
Steam bending is difficult.
Compatibilité avec outils manuels
No particular problems.
UTILISATIONS
UTILISATIONS FINALES (RÉSUMÉ)
HOUSING GENERAL, beams, joists, boards, frames, steps, panelling, fittings, FURNITURE AND CABINETS, luxury furniture, cabinets, PLYWOOD AND VENEER, faces, Decorative veneer, TURNING, ornaments, turned furniture, cutlery, lasts, OTHER AND MUSICAL INSTRUMENTS, handicrafts, moldings
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
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
Faces (de placage)
- 26 - Annual Review and Assessment of the World Timber Situation 1998-ITTO
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
Artisanat
- 66 - Maderas latinoamericanas. VII. Caracteristicas anatomicas. propiedades fisicomecanicas, de secado, y tratabilidad de la madera juvenil de Cordia alliodora (Ruiz & Pav. Oken.)
Moulures
- 79 - Padronização da Nomenclatura Comercial Brasileira das Madeiras Tropicais Amazônicas, Sugestão
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