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CURUPAY (Piptadenia grata)
Nome comercial
Curupay
Nome científico (autor)
Piptadenia grata (Willd.) J.F. Macbr.
Família
LEGUMINOSAE
Nomes comuns
Angico preto (Brazil); Kurupau (Bolivia); Cebil moro (Argentina); Curupay (Argentina); Cebil colorado (Argentina); Angico vermelho (Brazil); Kurupa`y kuru (Paraguay); Kurupay (Paraguay); Kurupayra (Paraguay); Cebil (Argentina); Vilga (Peru); Tarahuilca (Peru); Algarrobo (Peru); Chocolatillo (Colombia); Vilco (Bolivia); Cebil (Bolivia); Curupau (Bolivia); Curupay Negro (Brazil); Dark Angico; Curupay (Brazil); Arapiraca (Brazil); Angico Preto Rajado (Brazil); Angico Preto (Brazil)
Nome científico sinônimo (autor
Piptadenia macrocarpa Benth.; Anadenanthera macrocarpa (Benth.) Brenan; Anadenanthera macrocarpa (Benth.) Brenan; Anadenanthera colubrina (Vell.) Brenan; Anadenanthera colubrina var. cebil (Griseb.) Reis; Acacia grata Willd.
DESCRIÇÃO DA ÁRVORE
Descrição botânica
It is reported to attain a height of 20 to 35 m, with a trunk diameter that can reach up to 100 cm, but more commonly 40 to 70 cm in diameter. Usually the tree develops an irregular stem, with commercial lengths of 15 to 20 m. The seeds are reported to h
Habitat natural
Piptadenia grata is a fast growing species, typical in secondary forests where it is dominant. It prefers stony or sandy well drained sites. Piptadenia is reported to regrow from the stump.
Distribuição natural
This species occurs in Brazil, Peru, Bolivia and Paraguay.
Usos não madeiravéis
The bark of this species is reported to have a high tannin content.
IDENTIFICAÇÃO DA MADEIRA
Descrição anatômica da madeira (macro e micro)
Wood diffuse porous. Vessels solitary and in short radial multiples. Tangential diameter of vessel lumina 100 micras or less (very small). Yellow-colored deposits in heartwood vessels. Vestured pits. Vessels per mm2 10 to 20 (abundant). Simple perforation plate Axial parenchyma in marginal or in seemingly marginal bands. Paratracheal axial parenchyma scanty and/or vasicentric. Axial parenchyma lozenge-aliform. Axial parenchyma confluent. Prismatic crystals in chambered axial parenchyma cells and/or in fibers. 4 to 10 rays per mm (medium). Rays 1 to 4 seriate. Homogeneous rays and/or sub-homogeneous rays (all ray cells procumbent). Non-septate fibers. Fibers very thick walled. Fibers with simple to minutely bordered pits.
DISPONIBILIDADE
Situação CITES sobre a proteção
Unrestricted
DESCRIÇÃO GERAL DA MADEIRA
Odor ou Cheiro
It has no distinct odor or taste.
Cor
The sapwood is yellowish light brown, the heartwood gradually changes into reddish brown.
Indice de cor
4
Grã
The grain is frequently interlocked.
Veios ou desenhos na superfície
The wood is frequently reported to be fine textured.
Brilho
This species has moderate to high luster.
DURABILIDADE NATURAL
P. grata is reported to be very durable, even in contact with the ground.
Indice de durabilidade natural
1
Tratamento preservativo
It is very difficult to treat with preservatives.
PROPRIEDADES FÍSICAS DA MADEIRA
Densidade básica (Peso seco/Volume saturado) (g/cm³)
0.90
Densidade seca ao ar 12% (g/cm³)
1.05
Contração Tangencial Total (Saturado até peso seco) (%)
8.1
Contração Radial Total (Saturado até peso seco) (%)
4.9
Defeitos causados pela secagem
Ease of Drying: Drying is rapid. Drying Defects: Slight cupping but severe tendency to casehardening are reported.
Estabilidade dimensional (Contração Tangencial Total %/Contração Radial Total %)
1.7
PROPRIEDADES QUÍMICAS DA MADEIRA
PROPRIEDADES MECÂNICAS DA MADEIRA
Resistência a flexão a 12% (Módulo de ruptura) (kgf/cm²)
1890
Resistência a compressão paralela as fibras a 12% (kgf/cm²)
886
TRABALHABILIDADE
Serrar ou Cortar
Cutting is rated as difficult when the wood is dry, it is recommended to cut it while green.
Desdobro da tora em torno para lâminas
It can be used for decorative veneer.
Desdobro da tora em faqueadeira para lâminas
It can be used for decorative veneer.
Aspectos do processamento em máquinas
Machining operations are rather difficult.
Aplainamento
It is difficult to plane.
Aplicação para molduras
Molding of this species is reported to be difficult.
Comportamento na aplicação de pregos
Nailing properties are poor.
Acabamento
It is easy to finish.
Trabalhabilidade com ferramentas manuais
The wood responds poorly to hand tools.
USOS FINAIS RELATADOS
USOS FINAIS (RESUMO)
EXTERIOR GENERAL, crossties, HOUSING GENERAL, beams, boards
EXTERIOR
- 1 - Tabela de resultados de ensaios fisicos e mecanicos
Dormentes
- 8 - Maderas latinoamericas. III, Podocarpus standleyi ,Podocarpus oleifolius, Drims granadensis, Magnolia poasana y Didymopanax pittieri
CASAS
- 10 - Silica in Timbers
Vigas
- 11 - Prospect: The wood database
Tábuas
- 13 - Dry kiln schedules for commercial woods. Temperate and tropical. Section III. Latin American (Mexico, Central, and South America) Woods–Conventional Temperatures
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