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MANDIOQUEIRA ÁSPERA (Qualea brevipedicellata)
Trade Name
Mandioqueira Áspera
Scientific Name
Qualea brevipedicellata Stafleu
Family
VOCHYSIACEAE
Common Names
Mandioqueira Áspera (Brazil); Mandioqueira (Brazil)
Description Of The Tree
Botanical Description
It is a straight and cylindrical tree, with commercial bole lengths of 13 m and diameters of 60 cm.
Natural Distribution
In Brazil it is found in the lower Amazon region, Belém, Gurupá, Almirim highland and Tapajós river (Pará) and Rondonia.
Wood Identification
Anatomic Description Of Wood
Occasionally vessels per mm2 less than 6. Wood diffuse porous. Occasionally tangential diameter of vessel lumina 200 micras or more. Paratracheal axial parenchyma scanty and/or vasicentric. Axial parenchyma aliform. Axial parenchyma confluent.
Availability
Cites Status
Unrestricted
General Wood Description
Color
The heartwood and sapwood are distinct. The heartwood is strong brown with slight lines and the sapwood is pale yellow.
COLOR INDEX (1=Black, 7=Light yellow,white)
5
Grain
The grain is mostly interlocked.
Texture
The texture varies from medium to coarse.
Luster
The wood is moderate in luster.
Natural durability index (1= Very high durability, 7=Vey low durability)
4
Resistance To Impregnation
It is reported to be easy to impregnate with preservative salts.
Wood Physical Properties
Basic Density or Specific Gravity (O.D. weight/vol. green) (g/cm³)
0.74
Air-dry Density (Weight and volume at 12%MC) (g/cm³)
0.84
Total shrinkage Tangential (Saturated to 0%MC) (%)
8.6
Total shrinkage Radial (Saturated to 0%MC) (%)
4.4
Drying Defects
Ease of Drying: Air seasoning is generally reported to be difficult. Drying Defects: Strong tendency to warp and check, collapse and honeycombing are also reported. Kiln Schedules: Careful drying is recommended.
Recommended Dry Kiln Schedule
BR-B
Dimensional stability ratio (Total Tangential Shrinkage %/Total Radial Shrinkage %)
2.0
Wood Chemical Properties
Wood Mechanical Properties
Bending Strength (MOR),12%MC (kgf/cm²)
1346
Stiffness (MOE) 12%MC (kgf/cm²)
159000
Compression parallel to fiber 12%MC (kgf/cm²)
814
Compression perpendicular to fiber 12%MC (kgf/cm²)
145
Shear strength radial 12%MC (kgf/cm²)
134
Janka hardness (side) 12%MC (kgf)
982
Janka hardness (end grain) 12%MC (kgf)
1125
Workability
Planing
Planing operations are easy, but with a bad finishing.
Boring
Boring is reported to be easy, with good finishing.
Sanding
It is difficult to sand.
REFERENCED USES
End Uses Summary
HOUSING GENERAL, frames, panelling, FURNITURE AND CABINETS, PLYWOOD AND VENEER, NAVAL CONSTRUCTION, OTHER AND MUSICAL INSTRUMENTS, handicrafts
General Housing
- 10 - Silica in Timbers
Frames
- 16 - Woods of the World
Paneling
- 18 - W3TROPICOS Missouri Botanical Garden
Furniture Cabinets
- 21 - Tropical timbers of the world. Part III-Southeast Asian and Oceanian Species.
Panels, Veneers
- 25 - Directory of Timber Trade Malaysia
Shipbuilding
- 55 - Tropical Timber Atlas of Latin America
Handcraft
- 66 - Maderas latinoamericanas. VII. Caracteristicas anatomicas. propiedades fisicomecanicas, de secado, y tratabilidad de la madera juvenil de Cordia alliodora (Ruiz & Pav. Oken.)
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