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BLUE GUM, EUCALIPTO (Eucalyptus globulus)

Trade Name

Blue gum, Eucalipto

Scientific Name

Eucalyptus globulus Labill.

Family

MYRTACEAE

Common Names

Tasmanian blue gum; Southern blue gum; Kurpoora maram; Fever tree; Eurabbi; Eucalyptus; Blue gum; Bloekom

Description Of The Tree

Botanical Description

It can reach a height of 45 m with a diameter of 90 cm.

Natural Distribution

It can be found mainly in Tasmania (Australia) but extensively cultivated in plantations in subtropical regions.

Plantations Available?

This species is extensively planted in subtropical regions.

Non Timber Uses

The wood contains gum veins filled with dark gummy substances. Brittle heart is commonly reported in this species.

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Wood Identification

Anatomic Description Of Wood

Wood diffuse porous. Vessels in diagonal and/or radial pattern. Vessels exclusively solitary (over 90%). Vestured pits. Vessel-ray pits reticulate and/or foraminate. Paratracheal axial parenchyma scanty and/or vasicentric. Rays more than 10 per mm (abundant). Rays exclusively uniseriate. Fibers with distinctly bordered pits.

  • Wood Macro Photo Tangential Plane
  • Wood Micro Photo Of Transversal Section

Availability

Cites Status

Unrestricted

General Wood Description

Odor

It has no taste or odor.

Color

The sapwood is pale grayish, fairly clearly demarcated from pale yellow-brown to pinkish-gray heartwood.

COLOR INDEX (1=Black, 7=Light yellow,white)

5

Grain

The grain is generally interlocked, but patches of spiral or wavy grain can occur in straight-grained material.

Texture

The texture of the wood is medium.

Natural Durability

It is prone to termite and marine borer attack.

Natural durability index (1= Very high durability, 7=Vey low durability)

4

Internal Growth Stresses

Significant growth stresses are reported for this species.

Silica Content

Silica Content: It is non-siliceous. Silica Value: 0

Resistance To Impregnation

The sapwood is permeable and it can be treated with preservatives.

Wood Physical Properties

Basic Density or Specific Gravity (O.D. weight/vol. green) (g/cm³)

0.73

Air-dry Density (Weight and volume at 12%MC) (g/cm³)

0.82

Total shrinkage Tangential (Saturated to 0%MC) (%)

12.8

Total shrinkage Radial (Saturated to 0%MC) (%)

9.4

Drying Defects

Ease of Drying: The wood dries fairly slowly, with only slight seasoning defects. In Malaysia it takes 2.5 to 3 months to air dry 15 mm thick boards. Drying Defects: Cupping, bowing, end checking, splitting and staining are reported. Kiln Schedules: In Papua New Guinea a kiln schedule with a dry-bulb temperature of 55 to 71 degrees gave acceptable results for the wood of this species. Using this schedule the wood can be dried from 65% to 15% moisture to 15% moisture content in 6 days.

Recommended Dry Kiln Schedule

UK-C; US-T3-C2

Dimensional stability ratio (Total Tangential Shrinkage %/Total Radial Shrinkage %)

1.4

Wood Chemical Properties

Wood Mechanical Properties

Bending Strength (MOR),12%MC (kgf/cm²)

1324

Stiffness (MOE) 12%MC (kgf/cm²)

186335

Compression parallel to fiber 12%MC (kgf/cm²)

784

Shear strength radial 12%MC (kgf/cm²)

65

Janka hardness (side) 12%MC (kgf)

756

Janka hardness (end grain) 12%MC (kgf)

658

Workability

Sawing

It is reported to saw fairly well for a heavy wood.

Rotary Veneer Cutting

This species is reported to have good characteristics for lamination.

Sliced Veneer

This species is reported to have good characteristics for lamination.

Machining

It tends to pick up grain in localized areas due to interlocked grain.

Turning

30

Nailing

It needs pre-boring.

Gluing

It is reported to be easy to glue.

Staining

It has a good staining.

Coatings

This species is reported to be easy to paint or varnish.

REFERENCED USES

End Uses Summary

EXTERIOR GENERAL, bridges, poles, rails, crossarms, crossties, HOUSING GENERAL, flooring, FURNITURE AND CABINETS, PLYWOOD AND VENEER, TURNING, TOOLS, tool handles, agricultural tools, PACKING, CONTAINERS, truck bodies, truck flooring, NAVAL CONSTRUCTION, boats, port pillar, port storage, OTHER AND MUSICAL INSTRUMENTS, handicrafts, particleboard, paper

Exterior General
  • 1 - Tabela de resultados de ensaios fisicos e mecanicos
Bridges
  • 2 - 25 madeiras da amazonia de valor comercial, caracterizacao, macroscopica, usos comuns e indices qualificativos
Poles
  • 3 - Estudo dendrologico e determinacao das caracteristicas fisicas e mecanicas do genipapo (Genipa americana)
Rails
  • 6 - Physical and mechanical properties of Eucalyptus deglupta Blume grown in Costa Rica
Crossheads Crossarms
  • 7 - Maderas latinoamericanas. II, Quercus alata Q. costaricensis y Q. eugeniaefolia
Crossties
  • 8 - Maderas latinoamericas. III, Podocarpus standleyi ,Podocarpus oleifolius, Drims granadensis, Magnolia poasana y Didymopanax pittieri
General Housing
  • 10 - Silica in Timbers
Flooring
  • 14 - Handbook of Hardwoods
Furniture Cabinets
  • 21 - Tropical timbers of the world. Part III-Southeast Asian and Oceanian Species.
Panels, Veneers
  • 25 - Directory of Timber Trade Malaysia
Turning
  • 30 - Embassy of Honduras in Japan
Tools
  • 42 - Utilización Industrial de Nuevas Especies Forestales en el Perú.
Tool Handles
  • 43 - Maderas de Bolivia (Características y Usos de 55 Maderas Tropicales)
Agricultural Tools
  • 44 - Atlas of Peruvian Woods
Packing
  • 45 - Recopilación y Análisis de Estudios Tecnológicos de Maderas Peruanas
Truck Body
  • 53 - Timbers of the New World
Truck Flooring
  • 54 - Bulletin of the Government Forest Experiment Station N.157: Identification of Tropical Woods
Shipbuilding
  • 55 - Tropical Timber Atlas of Latin America
Boats
  • 56 - Manual de Identificación de Especies Forestales de la Subregión Andina.
Port Pillar
  • 61 - Manual de Diseño para Maderas del Grupo Andino
Port Storage
  • 62 - Estudio Tecnológico de Maderas del Perú (Zona Pucallpa) Vol I
Handcraft
  • 66 - Maderas latinoamericanas. VII. Caracteristicas anatomicas. propiedades fisicomecanicas, de secado, y tratabilidad de la madera juvenil de Cordia alliodora (Ruiz & Pav. Oken.)
Particleboard
  • 80 - Estudio Integral de la Madera para Construcción
Paper
  • 82 - Compilation of Data on the Mechanical Properties of Foreign woods (Part 2) Central and South America.

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