KONDROTI (Rhodognaphalon brevicuspe)

Nom commercial

Kondroti

Nom scientifique (avec auteur)

Rhodognaphalon brevicuspe (Sprague) Roberty

Famille

BOMBACACEAE

Noms communs (pays)

Kondroti (Côte d`Ivoire); East African Bombax (United Kingdom); Ogumalanga (Gabon); N'demo (Congo); East africa bombax (United Kingdom); Mfume (Tanzania); Munguza (Mozambique); Meguza (Mozambique); N`demo (Congo); Alone (Gabon)

Synonymes du nom scientifique (avec auteurs)

Bombax rhodognaphalon K. Schum.; Bombax chevalieri Pellegr.; Bombax brevicuspe Spreng.; Bombax brevicuspe Sprague

DESCRIPTION DE L'ARBRE

Description botanique

The tree reaches a height of 43 m. The bole is cylindrical, straight, and may be up to 26 m in length. The trunk diameter attains from 130 up to 200 cm.

Habitat naturel

Rhodognaphalon brevicuspe occurs in various forest types, particularly in secondary forests, also in savanna and dense rain forests.

Répartition naturelle

West Africa and extending eastward into Tanzania.

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). Tyloses thin walled. Non-vestured pits. Vessels per mm2 less than 6 (rare). Simple perforation plates. Vessel-ray pits coa Apotracheal axial parenchyma diffuse and/or diffuse in aggregates. Axial parenchyma storied. Prismatic crystals in non-chambered axial parenchyma cells. 3 to 4 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.

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 whitish, it has a thickness of 10 cm. The heartwood is ochre-brown to pale purplish brown, with slightly darker veins, it is clearly demarcated. The silver figure is fine.

Index de Teinte (1 = Noir, 7 = Jaune clair)

Grain

Straight or slightly interlocked, sometimes with an influence on further processing operations.

Texture

This species is usually reported to have a coarse texture.

Luster

Luster is usually low.

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 resistant to Lyctus attacks.

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

Tensions internes de croissance

Residual stresses are reported to be absent.

Teneur en silice

Silica Content: Negligible contents of silica are found in timber of this species. Amounts over 0.05% may affect the wood processing. Silica Value: 0.01

Résistance à l'imprégnation

Easy to treat with a full penetration of the preservative products using vacuum-pressure method.

PROPRIÉTÉS PHYSIQUES DU BOIS

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

0.43

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

0.46

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

8.2

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

4.3

Défauts dus au séchage

Ease of Drying: Drying is rather slow and sometimes difficult to perform. 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.

Calendrier de séchage en séchoir recommandé

FR-7

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

1.9

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)

596

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

89280

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

358

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

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

Dureté Janka (latérale) 12%TH (kgf)

260

Dureté Janka (extrémités) 12%TH (kgf)

358

OUVRABILITÉ

Sciage

It is easy to saw.

Coupe de placage de déroulage

Suitable for peeling without treatment.

Placage tranche

Suitable for peeling without 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.

Tournage

Perçage

Moderately easy; tools must be cautiously sharpened.

Mortaisage

Moderately easy; tools must be cautiously sharpened.

Clouage

Easy to perform but low nails holding.

Collage

Glues well if basic gluing technical rules are followed.

Ponçage

Easy to perform; it gives good results.

Polissage

Needs pre-coating.

Compatibilité avec outils manuels

No particular problems.

UTILISATIONS

UTILISATIONS FINALES (RÉSUMÉ)

HOUSING GENERAL, boards, frames, steps, panelling, fittings, FURNITURE AND CABINETS, common furniture, PLYWOOD AND VENEER, faces, cores, TURNING, ornaments, turned furniture, cutlery, lasts, PACKING, heavy packing, pallets, OTHER AND MUSICAL INSTRUMENTS, handicrafts, door core, coffin, moldings, cementboard

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

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 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

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

EMBALLAGE

45 - Recopilación y Análisis de Estudios Tecnológicos de Maderas Peruanas

Embal_lourd

47 - Arvores Brasileiras

Emballage, palettes

48 - The strength properties of timbers

Artisanat

66 - Maderas latinoamericanas. VII. Caracteristicas anatomicas. propiedades fisicomecanicas, de secado, y tratabilidad de la madera juvenil de Cordia alliodora (Ruiz & Pav. Oken.)

âme_porte

76 - Descripción General y Anatómica de 105 Maderas del Grupo Andino.

Cercueils

78 - Amazonian Timbers for the International Market

Moulures

79 - Padronização da Nomenclatura Comercial Brasileira das Madeiras Tropicais Amazônicas, Sugestão

Cementboard

81 - Madeiras da Amazônia: descrição do lenho de 40 espécies ocorrentes na Floresta Nacional do Tapajós

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