< Retour QUEBRACHO BLANCO (Aspidosperma quebracho-blanco) Version imprimable
QUEBRACHO BLANCO (Aspidosperma quebracho-blanco)
Nom commercial
Quebracho blanco
Nom scientifique (avec auteur)
Aspidosperma quebracho-blanco Schltdl.
Famille
APOCYNACEAE
Noms communs (pays)
White quebracho; Weisse quebrachoholz; Quebraco bianco; Quebracho blanco lloron; Quebracho blanco colorado; Quebrachillo; Horco quebracho; Quebracho blanco
Synonymes du nom scientifique (avec auteurs)
Macaglia quebracho-blanco (Schltdl.) Lyons; Aspidosperma crotalorum Speg.; Aspidosperma chakensis Speg.
DESCRIPTION DE L'ARBRE
Description botanique
It is a 15 to 18 m tall tree, with a trunk diameter of about 80 cm. Heights of up to 33 m and trunk diameters of up to 100 are also reported.
Habitat naturel
Aspidosperma quebracho-blanco is found in the subtropical humid forests in the "Chaco" formation.
Répartition naturelle
This species is reported to occur in the southern forests of Bolivia in Santa Cruz and Beni, close to the border with Paraguay in the "Chaco" area.
Usages non ligneux
The bark of this tree is reported to have alkaloids, and it is used as a natural medicine against pulmonary and cardiovascular ailments.
IDENTIFICATION DU BOIS
Description anatomique du bois
Wood diffuse porous. Vessels exclusively solitary (over 90%). Tangential diameter of vessel lumina 100 micras or less (very small). Vessels per mm2 10 to 20 (abundant). Simple perforation plates. Vessel-ray pits similar to intervessel pits in size and shape. In Apotracheal axial parenchyma diffuse and/or diffuse in aggregates. Prismatic crystals in non-chambered axial parenchyma cells. Prismatic crystals in chambered axial parenchyma cells and/or in fibers. 5 to 8 cells per parenchyma strand. Rays more than 10 per mm (abundant). Rays 1 to 4 seriate. Prismatic crystals in the ray cells. Homogeneous rays and/or sub-homogeneous rays (all ray cells procumbent). Fibers with distinctly bordered pits.
Disponibilité
Statut CITES
Unrestricted
DESCRIPTION GÉNÉRALE DU BOIS
Odeur
Pleasant smell is reported
Teinte
The sapwood differentiated, it is pinkish yellow. It makes a sharp contrast with heartwood which is dark brown
Index de Teinte (1 = Noir, 7 = Jaune clair)
6
Grain
The grain is frequently interlocked.
Texture
The texture of the wood is fine.
Luster
Luster is reported to be moderate.
Durabilité naturelle
This species is reported as durable, especially when it is not in contact with the ground.
Index de durabilité naturelle (1 = Très élevée, 7 = Très faible)
1
Résistance à l'imprégnation
Quebracho blanco is moderately permeable, it has a high retention of oil and water based preservatives.
PROPRIÉTÉS PHYSIQUES DU BOIS
Densité basale ou gravité spécifique (poids anhydre/vol. saturé) (g/cm³)
0.80
Densité sèche à l'air (poids et volume à 12%TH) (g/cm³)
0.92
Retrait tangentiel total (saturé à 0%TH) (%)
8.6
Retrait radial total (saturé à 0%TH) (%)
4.7
Défauts dus au séchage
Ease of Drying: It is moderately difficult to air season, it dries at a moderate rate. Drying Defects: Slight checking and moderate warping are reported. Casehardening may occur in thick stock. Kiln Schedules: Drying of pieces over 40 mm is reported to be very difficult, slow drying is recommended.
Calendrier de séchage en séchoir recommandé
US-T6-D2; UK-E
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)
977
Résistance à la compression parallèle à la fibre 12%TH (kgf/cm²)
620
Dureté Janka (latérale) 12%TH (kgf)
979
OUVRABILITÉ
Sciage
Sawing of this species is reportedly fair.
Usinage
Machining is difficult because of its hardness, reinforced cutting tools are recommended.
Rabotage
Planing of this species is fair.
Tournage
30
Perçage
Boring of this species is fair.
Clouage
This wood is difficult to nail.
Collage
The behavior in gluing is fair.
Finissage
It has a good finishing.
Polissage
Polishing behavior is fair.
Cintrage à la vapeur
A. quebracho-blanco can be bent with good results.
Espèces de substitution
It has been suggested as a substitute for Ash or Hickory for tools handles. In situations where strength is important, it could replace rock maple or beech.
UTILISATIONS
UTILISATIONS FINALES (RÉSUMÉ)
EXTERIOR GENERAL, crossarms, crossties, HOUSING GENERAL, beams, joists, boards, flooring, frames, steps, FURNITURE AND CABINETS, common furniture, PLYWOOD AND VENEER, common veneer, TURNING, turned furniture, TOOLS, tool handles, agricultural tools, PACKING, pallets, CONTAINERS, truck bodies, truck flooring
EXTERIOR GENERAL
- 1 - Tabela de resultados de ensaios fisicos e mecanicos
Crosses
- 7 - Maderas latinoamericanas. II, Quercus alata Q. costaricensis y Q. eugeniaefolia
Traverses de chemin de fer
- 8 - Maderas latinoamericas. III, Podocarpus standleyi ,Podocarpus oleifolius, Drims granadensis, Magnolia poasana y Didymopanax pittieri
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
Cadres
- 16 - Woods of the World
Marches
- 17 - Tree Conservation Database
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
Placage ordinaire
- 29 - Embassy of Ecuador in Japan
Tournage
- 30 - Embassy of Honduras in Japan
Ornements
- 32 - Embassy of Cote d`Ivoire 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
EMBALLAGE
- 45 - Recopilación y Análisis de Estudios Tecnológicos de Maderas Peruanas
Emballage, palettes
- 48 - The strength properties of timbers
Carros_camion
- 53 - Timbers of the New World
Wagons
- 54 - Bulletin of the Government Forest Experiment Station N.157: Identification of Tropical Woods
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