< Retour ZAIZOU (Gymnostemon zaizou) Version imprimable
ZAIZOU (Gymnostemon zaizou)
Nom commercial
Zaizou
Nom scientifique (avec auteur)
Gymnostemon zaizou Aubrev. et Pellegr.
Famille
SIMAROUBACEAE
Noms communs (pays)
Zaizou (Côte d`Ivoire); Zaizou
Synonymes du nom scientifique (avec auteurs)
Mannia zaizou (Aubrev. & Pellegr.) Aubrev.
DESCRIPTION DE L'ARBRE
Description botanique
The tree reaches a height of 40 m. The bole is straight, cylindrical, with high buttresses up to 3.2 m. The trunk diameter attains 100 to 150 cm over the buttresses.
Habitat naturel
Gymnostemon zaizou occurs in swampy or periodically inundated forests. Often sparsely distributed over large areas of primitive forests.
IDENTIFICATION DU BOIS
Description anatomique du bois
Wood diffuse porous. Occasionally vessels exclusively solitary (over 90%). Tangential diameter of vessel lumina 200 micras or more (large). Non-vestured pits. Vessels per mm2 less than 6 (rare). Simple perforation plates. Vessel-ray pits similar to intervessel Axial parenchyma in marginal or in seemingly marginal bands. Paratracheal axial parenchyma scanty and/or vasicentric. Axial parenchyma in thick bands. Prismatic crystals in short chains in chambered axial parenchyma cells. Occasionally siliceous bodies in the Rays non-storied. Larger rays more than 4 seriate. Occasionally silica bodies in the ray cells. Prismatic crystals in radial alignment in procumbent ray cells (chambered cells). Body ray cells procumbent with one row of upright and/or square marginal cells (K Non-septate fibers. Fibers with simple to minutely bordered pits.
Disponibilité
Statut CITES
Unrestricted
DESCRIPTION GÉNÉRALE DU BOIS
Teinte
The heartwood is yellowish white, it is not demarcated.
Grain
Straight; grain has no particular influence on drying, machining and finishing qualities.
Texture
The wood is typically coarse in texture.
Luster
This species is high 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.
Index de durabilité naturelle (1 = Très élevée, 7 = Très faible)
5
PROPRIÉTÉS PHYSIQUES DU BOIS
Densité basale ou gravité spécifique (poids anhydre/vol. saturé) (g/cm³)
0.37
Densité sèche à l'air (poids et volume à 12%TH) (g/cm³)
0.39
Retrait tangentiel total (saturé à 0%TH) (%)
6.2
Retrait radial total (saturé à 0%TH) (%)
3.7
Défauts dus au séchage
Ease of Drying: It is reported that air drying of 13 mm and 38 mm thick boards took 3-4 months and 4-5 months respectively. Drying Defects: The wood is subject to degrade with moderately severe end-checking, slight cupping, bowing and splitting. During drying it is highly susceptible to sap-stain and insect attack.
Ratio de stabilité dimensionnelle (% retrait tangentiel total/% retrait radial total)
1.7
PROPRIÉTÉS CHIMIQUES DU BOIS
PROPRIÉTÉS MÉCANIQUES DU BOIS
Résistance à la flexion (module de rupture_MOR) 12%TH (kgf/cm²)
401
Rigidité (module d'élasticité_ MOE) 12%TH (kgf/cm²)
62000
Résistance à la compression parallèle à la fibre 12%TH (kgf/cm²)
230
Résistance à la compression perpendiculaire à la fibre 12%TH (kgf/cm²)
22
Résistance au cisaillement (radial) 12%TH (kgf/cm²)
51
Dureté Janka (latérale) 12%TH (kgf)
187
Dureté Janka (extrémités) 12%TH (kgf)
276
OUVRABILITÉ
Sciage
It is easy to saw.
Coupe de placage de déroulage
Suitable for peeling after heat treatment.
Placage tranche
Suitable for peeling after heat treatment.
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
Moderately easy; tools must be cautiously sharpened.
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.
Compatibilité avec outils manuels
No particular problems.
UTILISATIONS
UTILISATIONS FINALES (RÉSUMÉ)
FURNITURE AND CABINETS, common furniture, PLYWOOD AND VENEER, faces, cores, PACKING, light packing
MEUBLES ET M. DE RANGEMENT
- 21 - Tropical timbers of the world. Part III-Southeast Asian and Oceanian Species.
Meubles ordinaire
- 23 - Handbook of Hardwoods
PANNEAUX ET PLACAGE
- 25 - Directory of Timber Trade Malaysia
Faces (de placage)
- 26 - Annual Review and Assessment of the World Timber Situation 1998-ITTO
âmes (de placage)
- 27 - Embassy of Brazil in Japan
EMBALLAGE
- 45 - Recopilación y Análisis de Estudios Tecnológicos de Maderas Peruanas
Embal_léger
- 46 - ECUADOR, Inventario y Aprovechamiento de los Bosques del Sur Ecuatoriano
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