ASSAS (Bridelia grandis)
Nom commercial
Assas
Nom scientifique (avec auteur)
Bridelia grandis Pierre
Famille
EUPHORBIACEAE
Noms communs (pays)
Tekbe (Côte d`Ivoire); Tchikuibi (Côte d`Ivoire); Tchikouebi (Côte d`Ivoire); Assas (Côte d`Ivoire); Assas (Gabon); Assas
Synonymes du nom scientifique (avec auteurs)
Bridelia aubrevillei Pellegr.
DESCRIPTION DE L'ARBRE
Description botanique
The tree reaches a height of 32 m. The bole is sometimes 20 m long, nearly cylindrical, but not always straight. It presents small buttresses and short stilt roots or aerial roots at base. The trunk diameter attains 70 cm.
Habitat naturel
Bridelia grandis occurs in high closed forests, and secondary formations.
IDENTIFICATION DU BOIS
Description anatomique du bois
Wood diffuse porous. Vessels in radial multiples of 2 to 4. Tangential diameter of vessel lumina 100 to 150 micras (small). Tyloses thin walled. Vestured pits. Vessels per mm2 6 to 10 (medium). Reticulate, foraminate and/or other types of multiple perforation p Apotracheal axial parenchyma diffuse and/or diffuse in aggregates. Paratracheal axial parenchyma scanty and/or vasicentric. Prismatic crystals in chambered axial parenchyma cells and/or in fibers. 5 to 8 cells per parenchyma strand. 4 to 10 rays per mm (medium). Rays non-storied. Rays 1 to 4 seriate. Prismatic crystals in radial alignment in procumbent ray cells (chambered cells). Heterogeneous rays and/or multiseriate heterogeneous rays. Septate fibers present. Fibers with simple to minutely bordered pits.
Disponibilité
Statut CITES
Unrestricted
DESCRIPTION GÉNÉRALE DU BOIS
Teinte
The heartwood is grey-brown or brown, it is not clearly demarcated.
Grain
It has highly interlocked grain; special care is needed when drying because of frequent risks of distortion.
Texture
Fine texture is reported in this species.
Index de durabilité naturelle (1 = Très élevée, 7 = Très faible)
4
PROPRIÉTÉS PHYSIQUES DU BOIS
Densité basale ou gravité spécifique (poids anhydre/vol. saturé) (g/cm³)
0.54
Densité sèche à l'air (poids et volume à 12%TH) (g/cm³)
0.59
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: Schedule proposed as a reference by comparison with well known species taking into account to the general technological behavior of this species.
PROPRIÉTÉS CHIMIQUES DU BOIS
PROPRIÉTÉS MÉCANIQUES DU BOIS
Résistance à la flexion (module de rupture_MOR) 12%TH (kgf/cm²)
951
Rigidité (module d'élasticité_ MOE) 12%TH (kgf/cm²)
133923
Résistance à la compression parallèle à la fibre 12%TH (kgf/cm²)
587
Résistance à la compression perpendiculaire à la fibre 12%TH (kgf/cm²)
77
Dureté Janka (latérale) 12%TH (kgf)
429
Dureté Janka (extrémités) 12%TH (kgf)
533
OUVRABILITÉ
Sciage
It is easy to saw.
Coupe de placage de déroulage
Not suitable for veneering.
Placage tranche
Not suitable for veneering.
Effet d'émoussement
Slight blunting effect; ordinary tools can be used for sawing and machining.
Usinage
Machining of this species is reportedly easy.
Rabotage
Easy; no particular problems.
Moulurage
Easy; no particular problems.
Tournage
30
Perçage
Easy; no particular problems.
Mortaisage
Easy; no particular problems.
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.
Compatibilité avec outils manuels
No particular problems.
UTILISATIONS
UTILISATIONS FINALES (RÉSUMÉ)
HOUSING GENERAL, flooring, fittings, FURNITURE AND CABINETS, cabinets, PLYWOOD AND VENEER, cores, TURNING, TOOLS, tool handles, PACKING, CONTAINERS, truck bodies, truck flooring, NAVAL CONSTRUCTION, boats, OTHER AND MUSICAL INSTRUMENTS, handicrafts, scale model
MEUBLES ET M. DE RANGEMENT
- 10 - Silica in Timbers
Planchers
- 14 - Handbook of Hardwoods
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.
Armoires
- 24 - Empire Timbers
PANNEAUX ET PLACAGE
- 25 - Directory of Timber Trade Malaysia
âmes (de placage)
- 27 - Embassy of Brazil in Japan
Tournage
- 30 - Embassy of Honduras in Japan
OUTILS
- 42 - Utilización Industrial de Nuevas Especies Forestales en el Perú.
Outils_manches
- 43 - Maderas de Bolivia (Características y Usos de 55 Maderas Tropicales)
EMBALLAGE
- 45 - Recopilación y Análisis de Estudios Tecnológicos de Maderas Peruanas
Carros_camion
- 53 - Timbers of the New World
Wagons
- 54 - Bulletin of the Government Forest Experiment Station N.157: Identification of Tropical Woods
CONSTRUCTION NAVALE
- 55 - Tropical Timber Atlas of Latin America
Navires
- 56 - Manual de Identificación de Especies Forestales de la Subregión Andina.
Artisanat
- 66 - Maderas latinoamericanas. VII. Caracteristicas anatomicas. propiedades fisicomecanicas, de secado, y tratabilidad de la madera juvenil de Cordia alliodora (Ruiz & Pav. Oken.)
Maquettes
- 83 - Algunas caracteristicas fisicomecanicas de la madera de tres especies de la cordillera NeoVolcanica
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