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PALéTUVIER (Rhizophora racemosa)
Nom commercial
Palétuvier
Nom scientifique (avec auteur)
Rhizophora racemosa G.F.W.Mey.
Famille
RHIZOPHORACEAE
Noms communs (pays)
Odo nowe (Nigeria); Egba (Nigeria); Ntan (Gabon); Tanda (Cameroon); Palétuvier (Cameroon); Palétuvier
DESCRIPTION DE L'ARBRE
Description botanique
The tree reaches a height of 5 to 13 m. The bole is usually straight. The trunk diameter attains 30 to 70 cm.
Habitat naturel
Rhizophora racemosa is confined to muddy lagoons and estuaries.
Répartition naturelle
Along the coastal sites from Senegal to Angola.
IDENTIFICATION DU BOIS
Description anatomique du bois
Wood diffuse porous. Occasionally vessels exclusively solitary (over 90%). Tangential diameter of vessel lumina 100 micras or less (very small). Tyloses thin walled. Vessels per mm2 10 to 20 (abundant). Intervessel pits scalariform. Scalariform perforation plat Paratracheal axial parenchyma scanty and/or vasicentric. Non-crystals in axial parenchyma cells. 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 the ray cells. Heterogeneous rays and/or multiseriate heterogeneous rays. Non-septate fibers. Fibers with simple to minutely bordered pits.
Disponibilité
Statut CITES
Unrestricted
DESCRIPTION GÉNÉRALE DU BOIS
Teinte
The heartwood is from purple-red to dark red, it is not clearly demarcated.
Grain
Straight; grain has no particular influence on drying, machining and finishing qualities.
Texture
The wood is typically medium in texture.
Luster
Timber of this species is 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. Resistant to termites attack.
Index de durabilité naturelle (1 = Très élevée, 7 = Très faible)
5
Tensions internes de croissance
Residual stresses are reported to be absent.
PROPRIÉTÉS PHYSIQUES DU BOIS
Densité basale ou gravité spécifique (poids anhydre/vol. saturé) (g/cm³)
0.91
Densité sèche à l'air (poids et volume à 12%TH) (g/cm³)
1.06
Calendrier de séchage en séchoir recommandé
FR-10
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)
1547
Résistance à la compression parallèle à la fibre 12%TH (kgf/cm²)
859
Résistance à la compression perpendiculaire à la fibre 12%TH (kgf/cm²)
128
Dureté Janka (latérale) 12%TH (kgf)
1421
Dureté Janka (extrémités) 12%TH (kgf)
1383
OUVRABILITÉ
Sciage
Sawing of this species requires powerful equipment.
Coupe de placage de déroulage
Not suitable for veneering.
Placage tranche
Not suitable for veneering.
Effet d'émoussement
Severe blunting effect; stellited blades for sawing and carbide tools for machining are recommended.
Usinage
It needs powerful tools for processing. Possible difficulties caused by interlocked grain are reported.
Rabotage
Rather difficult; special tools are needed.
Moulurage
Easy; no particular problems.
Perçage
Easy; no particular problems.
Mortaisage
Easy; no particular problems.
Clouage
Pre-boring is necessary.
Collage
Difficult to glue because of high density.
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, boards, frames, NAVAL CONSTRUCTION
MEUBLES ET M. DE RANGEMENT
- 10 - Silica in Timbers
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
CONSTRUCTION NAVALE
- 55 - Tropical Timber Atlas of Latin America
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