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KERUING (Dipterocarpus cornutus)
Nombre comercial
Keruing
Nombre científico (con autor)
Dipterocarpus cornutus Dyer
Familia
Dipterocarpaceae
Nombres Comunes
Keruing (Malaysia); Keruwing (Germany); Eng (Myanmar); In (Myanmar); Keruing (Spain); Keroewing (Netherlands); Kruen (Italy); Keruing (France); Keruing (Italy); Dau (Cambodia); Dau (Vietnam); Kanyin (Myanmar); Yang (Thailand); Kruen (Spain); Kruen (France); Basilan (Philippines); Keruing (Indonesia); Indonesian gurjun (United States of America); Keruing gajah (Indonesia); Bagac (Philippines); Panau (Philippines); Hagakhak (Philippines); Indonesian keruing (United States of America); Gurjun (India); Indonesian gurjun (United Kingdom); Indonesian keruing (United Kingdom); Apitong (Philippines)
DESCRIPCIÓN DEL ÁRBOL
Descripción botánica
It is a very large tree, with long boles. This species is considered an oleo-resin tree.
IDENTIFICACIÓN DE LA MADERA
Descripción anatómica de la madera
Wood diffuse porous. Vessels exclusively solitary (over 90%). Tangential diameter of vessel lumina 200 micras or more (large). Vestured pits. Vessel-ray pits reticulate and/or foraminate. Simple perforation plates. Intervessel pits medium, 7 to 10 micras. Paratracheal axial parenchyma scanty and/or vasicentric. Axial parenchyma aliform. Larger rays more than 4 seriate. Sheath cells. Silica bodies in the ray cells. Body ray cells procumbent with over 4 rows of upright and/or square marginal cells (Kribs-I). Body ray cells procumbent with mostly 2 to 4 rows of upright and/or square marginal ce Fibers with distinctly bordered pits.
Disponibilidad
Status de protección por CITES
Unrestricted
DESCRIPCIÓN GENERAL DE LA MADERA
Olor
It has a distinctive smell of resin.
Color
The sapwood is yellowish to grayish-brown and usually distinctly demarcated from the heartwood, which is grayish-brown to red-brown.
Indice de Color (1= Negro, violeta; 7= Amarillo claro, blanco)
4
Grano
The grain is straight, sometimes interlocked.
Veta
The texture varies from moderately coarse to coarse but even.
Durabilidad Natural
Most of the species in the keruing group are rated as moderately durable. The resistance against dry wood insects is poor.
Indice de Durabilidad Natural (1=Muy alta, 7=Muy baja)
3
Contenido de sílice
Silica Content: Silica is present. Amounts over 0.05% may affect wood processing. Silica Value: 0
PROPIEDADES FÍSICAS DE LA MADERA
Densidad Básica (Peso anhidro/Vol. saturado) (g/cm³)
0.71
Densidad seca al aire (Peso y volúmen CH12%) (g/cm³)
0.80
Contracción Tangencial Total (Saturado hasta anhidro) (%)
11.3
Contracción Radial Total (Saturado hasta anhidro) (%)
6.4
Calendario de Secado
JP-3; UK-D; US-T3-D2
Estabilidad Dimensional (Contracción Total Tangencial %/Contracción Total Radial %)
1.8
PROPIEDADES QUÍMICAS DE LA MADERA
PROPIEDADES MECÁNICAS DE LA MADERA
Resistencia a flexión (Módulo de ruptura) CH12% (kgf/cm²)
1106
Rigidez (Módulo de elasticidad) CH12% (kgf/cm²)
175956
Resistencia a la compresión paralela a la fibra CH12% (kgf/cm²)
596
Cizallamiento radial CH12% (kgf/cm²)
102
Dureza Janka (lados) CH12% (kgf)
554
TRABAJABILIDAD
Aserrado
It is easy to cross cut but slightly difficult to saw. Resin present in wood is reported to clog the saw-teeth.
Corte de chapa rotativa
Resin patches are usually seen on the surface of the veneer. Preheating is essential for good peeling.
Chapa tranchada
Resin patches are usually seen on the surface of the veneer. Preheating is essential for good peeling.
Pérdida de filo_romado
Wood with high silica content quickly blunts saw-teeth.
Maquinado general
Special cutters are needed.
Cepillado
Planing is reported to be easy.
Taladrado
It has a tendency to split and tear grain during boring.
Clavado
Pre-boring is needed.
Encolado
The resin interferes with the gluing properties and the species that are too oily are generally not used.
Acabado
Subsequent resin exudation can cause problems. Filling recommended.
Usos Reportados
USOS FINALES (RESUMEN)
EXTERIOR GENERAL, bridges, HOUSING GENERAL, flooring, CONTAINERS, truck bodies, truck flooring, NAVAL CONSTRUCTION, boats, port pillar, port storage
EXTERIOR GENERAL
- 1 - Tabela de resultados de ensaios fisicos e mecanicos
Puentes
- 2 - 25 madeiras da amazonia de valor comercial, caracterizacao, macroscopica, usos comuns e indices qualificativos
VIVIENDA GENERAL
- 10 - Silica in Timbers
Pisos
- 14 - Handbook of Hardwoods
Carrocería de camión
- 53 - Timbers of the New World
Pisos de vagones_contenedores
- 54 - Bulletin of the Government Forest Experiment Station N.157: Identification of Tropical Woods
CONSTRUCCIÓN NAVAL
- 55 - Tropical Timber Atlas of Latin America
Botes
- 56 - Manual de Identificación de Especies Forestales de la Subregión Andina.
Puertos_pilares
- 61 - Manual de Diseño para Maderas del Grupo Andino
Puertos_estantería
- 62 - Estudio Tecnológico de Maderas del Perú (Zona Pucallpa) Vol I
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