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< Retour ALUMBI (Julbernardia seretii) Version imprimable

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ALUMBI (Julbernardia seretii)

Nom commercial

Alumbi

Nom scientifique (avec auteur)

Julbernardia seretii Troupin

Famille

LEGUMINOSAE

Noms communs (pays)

Mubangu (Zaire); Alumbi (Zaire); Ekop-zingana (Cameroon)

Synonymes du nom scientifique (avec auteurs)

Seretoberlinia seretii (De Wild.) Duvign.; Julbernardia ogoouensis Pellegr.; Berlinia seretii De Wild.; Berlinia ledermannii Harms

DESCRIPTION DE L'ARBRE

Description botanique

The tree reaches a height of 40 m. The bole may be up to 16 m in length, is straight, slender and cylindrical. Buttresses may be small or up to 3.2 m high. The trunk diameter attains 100 to 120 cm.

Habitat naturel

Julbernardia seretii prefers dense formations, it is often found in small groups.

En savoir plus

IDENTIFICATION DU BOIS

Description anatomique du bois

Wood diffuse porous. Occasionally vessels exclusively solitary (over 90%). Tangential diameter of vessel lumina 150 to 200 micras (medium). Vestured pits. Vessels per mm2 less than 6 (rare). Simple perforation plates. Vessel-ray pits similar to intervessel pits Axial parenchyma in marginal or in seemingly marginal bands. Axial parenchyma aliform. Prismatic crystals in chambered axial parenchyma cells and/or in fibers. 3 to 4 cells per parenchyma strand. 4 to 10 rays per mm (medium). Rays non-storied. Rays commonly 2 seriate. Body ray cells procumbent with one row of upright and/or square marginal cells (Kribs-III). Non-septate fibers. Fibers with simple to minutely bordered pits.

  • Vue macroscopique du bois (plan tangentiel)
  • Vue microscopique d'une section transversale du bois

Disponibilité

Statut CITES

Unrestricted

DESCRIPTION GÉNÉRALE DU BOIS

Teinte

The sapwood is yellow, it has a thickness of up to 30 cm. The heartwood is red-brown. dark or yellow stripes may be present, it is clearly demarcated.

Grain

It has highly interlocked grain; special care is needed when drying because of frequent risks of distortion.

Texture

This wood has a somewhat fine texture.

Luster

The wood is described as low in luster.

Durabilité naturelle

Resistant to termites attack. The heartwood is sensible to Lyctus attacks.

Index de durabilité naturelle (1 = Très élevée, 7 = Très faible)

4

Tensions internes de croissance

No growth stresses are reported in this species.

Résistance à l'imprégnation

Difficult to treat with only a low penetration of the preservative products.

PROPRIÉTÉS PHYSIQUES DU BOIS

Densité basale ou gravité spécifique (poids anhydre/vol. saturé) (g/cm³)

0.66

Densité sèche à l'air (poids et volume à 12%TH) (g/cm³)

0.74

Retrait tangentiel total (saturé à 0%TH) (%)

8.0

Retrait radial total (saturé à 0%TH) (%)

4.5

Défauts dus au séchage

Ease of Drying: Drying is very slow and difficult to perform; defects are frequent. Drying Defects: Risks of checks. Kiln Schedules: The kiln schedule has been tested.

Calendrier de séchage en séchoir recommandé

FR-12

Ratio de stabilité dimensionnelle (% retrait tangentiel total/% retrait radial total)

1.8

PROPRIÉTÉS CHIMIQUES DU BOIS

PROPRIÉTÉS MÉCANIQUES DU BOIS

Résistance à la flexion (module de rupture_MOR) 12%TH (kgf/cm²)

1108

Rigidité (module d'élasticité_ MOE) 12%TH (kgf/cm²)

184142

Résistance à la compression parallèle à la fibre 12%TH (kgf/cm²)

682

Résistance à la compression perpendiculaire à la fibre 12%TH (kgf/cm²)

94

Résistance au cisaillement (radial) 12%TH (kgf/cm²)

66

Dureté Janka (latérale) 12%TH (kgf)

672

Dureté Janka (extrémités) 12%TH (kgf)

762

OUVRABILITÉ

Sciage

It is moderately easy to saw.

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

Possible difficulties caused by interlocked grain are reported.

Rabotage

Moderately easy; tools must be cautiously sharpened.

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

Pre-boring is necessary.

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, beams, joists, boards, flooring, parquet, frames, panelling, fittings, FURNITURE AND CABINETS, luxury furniture, cabinets, PLYWOOD AND VENEER, Decorative veneer, TURNING, ornaments, turned furniture, cutlery, lasts, TOOLS, tool handles, agricultural tools, NAVAL CONSTRUCTION, boat fins, boat deck, boat oars, 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
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
OUTILS
  • 42 - Utilización Industrial de Nuevas Especies Forestales en el Perú.
Outils_manches
  • 43 - Maderas de Bolivia (Características y Usos de 55 Maderas Tropicales)
Outils_agric
  • 44 - Atlas of Peruvian Woods
CONSTRUCTION NAVALE
  • 55 - Tropical Timber Atlas of Latin America
Navires_ponts
  • 58 - Guía de Árboles de Bolivia
Navires_ponts
  • 59 - Programa Nacional de uso Sostenible de los Bosques e Incremento a las Exportaciones.
Navires_rames
  • 60 - Amazonian Timbers, Characteristics and Utilization Volume II; Curuá-Una Experimental Forest Station
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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