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ACAJOU D`AFRIQUE (Khaya anthotheca)
Nombre comercial
Acajou d`Afrique
Nombre científico (con autor)
Khaya anthotheca C.DC.
Familia
MELIACEAE
Nombres Comunes
Krala (Côte d`Ivoire); Ira (Côte d`Ivoire); Acajou sassandra (Côte d`Ivoire); Acajou Krala (Côte d`Ivoire); Acajou blanc (Côte d`Ivoire); African Mahogany (United Kingdom); N'Dola (Congo); N'Dola (Angola); White mahogany; Uganda mahogany; Smooth barked African mahogany; Red mahogany; Ogwango nofuwa; Ogigedu; Odupon; Ngollon; Mpohe; Lra; Lpaki; Lagos wood; Kwantannuro; Kwabohoro; Kwabohori; Kwabaho; Krumben; Kruba; Krala; Kirumbo; Khaya; Heavy African mahogany; Funfun; Dukuma-fufu; Diala; Bie-eh-nasa; Benin wood; Arwabotioro; Anthotheca; Akwantannuro; Ahafo timber; Ahafo mahogany; African mahogany; Acajou mangora; Acajou krala; Ogwango (Nigeria); Dukuma fufu (Ghana); Dubini (Ghana); Acajou d`Afrique (Côte d`Ivoire); Khaya mahogany (Germany); Acajou blanc (France); N`dola N`dola (Angola); Munyama (Uganda); N`dola N`dola (Congo); Mangona (Cameroon); Ahafo (Ghana); Acajou krala Acajou krala (Côte d`Ivoire)
Nombres científicos sinónimos (con autores)
Khaya mildbraedii Harms; Khaya euryphylla Harms; Khaya agboensis A. Chev.; Garretia anthotheca Welw.
DESCRIPCIÓN DEL ÁRBOL
Descripción botánica
The tree reaches a height of more than 50 m. The bole is usually straight, clear and cylindrical to 30 m in length, buttressed. The trunk diameter is up to 120 cm. Log is banned for international trading.(Cameroon)
Hábitat natural
Khaya anthotheca occurs in the intermediate zone between moist coastal and drier interior zones. It grows best in deep fertile soils on riverbanks. National conservation status in Cote d`Ivoire V, Liberia E, Uganda V/nt.
Distribución natural
From Sierra Leone and Liberia to Gabon, it extends eastward to Uganda.
Existencia de plantaciones?
Tested and planted in some African countries. In most cases, mixed plantations with other species (Niangon, Okoume, Bilinga). The duration of the rotation is 40 years, to reach 60 cm in diameter.
IDENTIFICACIÓN DE LA MADERA
Descripción anatómica de la madera
Wood diffuse porous. Occasionally vessels exclusively solitary (over 90%). Tangential diameter of vessel lumina 200 micras or more (large). Brown-colored deposits in heartwood vessels. Non-vestured pits. Vessels per mm2 6 to 10 (medium). Simple perforation plat Occasionally axial parenchyma in marginal or in seemingly marginal bands. Paratracheal axial parenchyma scanty and/or vasicentric. Occasionally prismatic crystals in non-chambered axial parenchyma cells. 3 to 4 cells per parenchyma strand. 4 to 10 rays per mm (medium). Rays of two distinct sizes. Occasionally rays storied. Rays 1 to 2 seriate. Larger rays more than 4 seriate. Body ray cells procumbent with mostly 2 to 4 rows of upright and/or square marginal cells (Kribs-II). Septate fibers present. Fibers with simple to minutely bordered pits.
Disponibilidad
Status de protección por CITES
Unrestricted
DESCRIPCIÓN GENERAL DE LA MADERA
Olor
Light and pleasant odor.
Color
The sapwood is creamy white to yellowish white, it has a thickness of 5 cm. The heartwood is pink to light red brown, it is clearly demarcated. The silver figure is fine.
Indice de Color (1= Negro, violeta; 7= Amarillo claro, blanco)
4
Grano
The grain is slightly but systematically interlocked.
Veta
The wood is typically medium in texture.
Brillo
This wood is frequently low in luster.
Durabilidad Natural
Moderately durable to decay. Without preservative treatment, this species can be used only under risk of occasional re-humidification. It is not suited for uses with risks of permanent or long-lasting humidification. Sensible to termites attack. The heart
Indice de Durabilidad Natural (1=Muy alta, 7=Muy baja)
3
Internal growth stresses
Residual stresses are reported to be absent.
Dificultad para impregnar
Nearly impossible to treat with a too much low penetration of the preservative substances.
PROPIEDADES FÍSICAS DE LA MADERA
Densidad Básica (Peso anhidro/Vol. saturado) (g/cm³)
0.55
Densidad seca al aire (Peso y volúmen CH12%) (g/cm³)
0.61
Contracción Tangencial Total (Saturado hasta anhidro) (%)
5.5
Contracción Radial Total (Saturado hasta anhidro) (%)
3.7
Defectos por secado
Ease of Drying: Air drying is good. It takes respectively 2 months and 5 months to air dry boards of 13 mm and 38 mm thick. Drying Defects: Risk of end-splitting and surface checking.
Calendario de Secado
FR-6
Estabilidad Dimensional (Contracción Total Tangencial %/Contracción Total Radial %)
1.5
PROPIEDADES QUÍMICAS DE LA MADERA
PROPIEDADES MECÁNICAS DE LA MADERA
Resistencia a flexión (Módulo de ruptura) CH12% (kgf/cm²)
850
Rigidez (Módulo de elasticidad) CH12% (kgf/cm²)
94245
Resistencia a la compresión paralela a la fibra CH12% (kgf/cm²)
495
Resistencia a la compresión perpendicular a la fibra CH12% (kgf/cm²)
61
Cizallamiento radial CH12% (kgf/cm²)
84
Dureza Janka (lados) CH12% (kgf)
454
Dureza Janka (extremos) CH12% (kgf)
558
TRABAJABILIDAD
Aserrado
It is easy to saw.
Corte de chapa rotativa
Suitable for slicing, also suitable for peeling if treated.
Chapa tranchada
Suitable for slicing, also suitable for peeling if treated.
Pérdida de filo_romado
Slight blunting effect; ordinary tools can be used for sawing and machining.
Maquinado general
Machining of this species is reportedly easy.
Cepillado
Easy; no particular problems.
Moldurado
Moderately easy; tools must be cautiously sharpened.
Torneado
30
Taladrado
Moderately easy; tools must be cautiously sharpened.
Escopleado, caja y espiga
Moderately easy; tools must be cautiously sharpened.
Clavado
No particular problem.
Encolado
Glues well if basic gluing technical rules are followed.
Lijado
Easy to perform; it gives good results.
Sacar lustre
Can be polished without surface preparation.
Doblar al vapor
Steam bending is difficult.
Facilidad para herramientas manuales
No particular problems.
Usos Reportados
USOS FINALES (RESUMEN)
HOUSING GENERAL, beams, joists, boards, frames, steps, panelling, fittings, FURNITURE AND CABINETS, luxury furniture, cabinets, PLYWOOD AND VENEER, faces, Decorative veneer, TURNING, ornaments, turned furniture, NAVAL CONSTRUCTION, boats, boat hulls, boat deck, port storage
VIVIENDA GENERAL
- 10 - Silica in Timbers
vigas
- 11 - Prospect: The wood database
Viguetas
- 12 - Tropical timbers of the world. Part I-Tropical American Species
Tablas
- 13 - Dry kiln schedules for commercial woods. Temperate and tropical. Section III. Latin American (Mexico, Central, and South America) Woods–Conventional Temperatures
Marcos
- 16 - Woods of the World
Peldaños
- 17 - Tree Conservation Database
Paneles
- 18 - W3TROPICOS Missouri Botanical Garden
Accesorios de madera
- 19 - Silica in Timbers
MUEBLES Y GABINETES
- 21 - Tropical timbers of the world. Part III-Southeast Asian and Oceanian Species.
Muebles finos
- 22 - Dry kiln schedules for commercial woods. Temperate and tropical. Section IV-Asian and Oceanian Woods
Gabinetes
- 24 - Empire Timbers
TABLEROS Y CHAPAS
- 25 - Directory of Timber Trade Malaysia
Caras
- 26 - Annual Review and Assessment of the World Timber Situation 1998-ITTO
chapa decorativa
- 28 - Ministry of Agriculture, Fisheries & Forest of Fiji
Torneado
- 30 - Embassy of Honduras in Japan
artículos torneados
- 31 - Embassy of Colombia in Japan
Artículos torneados
- 32 - Embassy of Cote d`Ivoire in Japan
CONSTRUCCIÓN NAVAL
- 55 - Tropical Timber Atlas of Latin America
Botes
- 56 - Manual de Identificación de Especies Forestales de la Subregión Andina.
Botes_cascos
- 57 - Estadísticas de Aprovechamiento, Exportación y comercialización Nacional de Productos Forestales
Botes_cubierta
- 59 - Programa Nacional de uso Sostenible de los Bosques e Incremento a las Exportaciones.
Puertos_estantería
- 62 - Estudio Tecnológico de Maderas del Perú (Zona Pucallpa) Vol I
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