Variation in wood physical properties within stems of Guazuma crinita, a timber tree species in the Peruvian Amazon

Coral, Lady Laura Tuisima; Odicio-Guevara, Joel E.; Weber, John C.; Lluncor-Mendoza, David; Lojka, Bohdan

doi:10.21829/myb.2017.2311534

Cited by 11 publications

(8 citation statements)

References 18 publications

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“…Therefore, the density cannot be used as a predictor of the T / R ratio for the three tested genera. The results were in agreement with (Tuisima-Coral et al, 2017) who found insignificant correlation between T/R ratio and basic density and specific gravity of Guazuma crinite wood. In contrast, (Van Duong and Matsumura, 2018) found linear positive correlation between T/R ratio and basic density of Melia azedarach wood.…”

Section: Figure 1 Relationship Between Density and T/r Ratiosupporting

confidence: 92%

Physical and Mechanical Characterization of Three Egyptian Woody Species

Hassan

2019

Journal of Plant Production

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Currently, there is lack of data provided in the literature regarding the wood quality of locally grown timber trees. It is known that the wood quality varies greatly from one geographical area to another depending on the growth conditions and environmental factors. Therefore, this study aimed to characterize the wood quality of three hardwoods species; Dalbergia sissoo Roxb. (irrigated with treated wastewater), Morus nigra, and Ficus retusa L. grown in Egypt in order to find the possible utilization of these species. Physical and mechanical properties were compared with the internationally published data in the literature, especially those grown in their native environment of the same three genera. Density, shrinkage characteristics, modulus of rupture (MOR), maximum crushing strength (MCS) and Janka hardness in tangential and radial surfaces (HT and HR) were determined. Simple linear regression analyses revealed strong correlations between density and mechanical strength properties (MOR, MCS, and HT). M. nigra exhibited lower mechanical performance compared with the data reported in the literature. In contrast, D. sissoo showed high mechanical performance, this may be a large part attributed to the irrigation with treated wastewater. However, both species fit the same uses found in the literature. In addition, this study indicates that both species also may serve as an alternative to beech and oak wood used as parquet flooring in Egypt. F. retusa wood can be used as a substitute for imported pine and spruce wood, which are widely used in the local market as wooden strips in the core layer of blockboards.

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Section: Figure 1 Relationship Between Density and T/r Ratiosupporting

confidence: 92%

Physical and Mechanical Characterization of Three Egyptian Woody Species

Hassan

2019

Journal of Plant Production

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“…A madeira é um material de grande potencial de uso na construção civil e pode ser procedente de florestas naturais ou plantadas (MAZURANA et al, 2011;MATOS et al, 2012;TER STEEGE et al, 2016;TUISIMA-CORAL et al, 2017). Entre os materiais comumente utilizados, a madeira é o único renovável, expressa elevada relação entre a resistência e o peso, e sua produção gera poucos impactos ambientais.…”

Section: Introductionunclassified

Deslocamentos excessivos em coberturas de madeira como condicionantes de patologias

et al. 2021

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Resumo A NBR 7190 (ABNT, 1997) assume o valor médio do módulo de elasticidade à compressão na direção paralela às fibras (Ec0,m) como o representativo de todas as barras de estruturas. Devido à variabilidade da madeira, tal metodologia pode resultar em valores de deslocamento superiores ao limite definido pela norma, o que pode gerar patologias na estrutura. Buscando avaliar a influência da adoção do Ec0,m no cálculo das flechas, foram realizados ensaios experimentais para obter as propriedades mecânicas da madeira branquilho. Com o auxílio de simulações numéricas e de valores experimentais, foram analisadas três tipologias (fink, bowstring e banzos paralelos) e dois vãos (10 m e 20 m). Adotando o Ec0,m, foram determinadas as cargas máximas para o deslocamento de L/200. Posteriormente, utilizando o mesmo carregamento, foram atribuídos valores aleatórios de rigidez para cada elemento da treliça, medindo o deslocamento máximo de cada modelo. Em modelos para os quais o módulo de elasticidade foi atribuído aleatoriamente, foram observadas flechas superiores em aproximadamente 28% e 32% para vãos de 10 m e de 20 m respectivamente. Isso pode justificar algumas patologias que podem ser evitadas com a pré-classificação não destrutiva e a colocação racional das peças em regiões mais solicitadas.

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“…Wood is a natural raw material obtained from natural or planted forests (MAZURANA et al, 2011;MATOS et al, 2012;TER STEEGE et al, 2016;TUISIMA-CORAL et al, 2017). In Brazil, Eucalyptus tree genus are utilized for a variety of applications, among them: pulp and paper, charcoal, essential oils, boards, firewood, construction, and furniture (GUIMARÃES JUNIOR et al, 2009BRITO;PERRÉ, 2010;IWAKIRI et al, 2013;SOARES et al, 2015;MATTOS et al, 2014;NEIVA et al, 2015;BALLESTEROS et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Physical and mechanical properties of Eucalyptus saligna wood for timber structures

et al. 2019

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Due to its great availability in planted forests in Brazil, Eucalyptus saligna appears as a good species to be exploited, in order to assist in the consumption of wood for construction purposes. The aim of this research was to determine the physical and mechanical properties of Eucalyptus saligna wood species for its use in civil construction. The evaluation was based on 16 physical and mechanical properties obtained according to NBR 7190 (1997) standard. Two values of moisture content were considered: 30% (above the fiber saturation point) and 12% (equilibrium moisture content) according to NBR 7190 (1997). All obtained results obtained were statistically analyzed according to the t-test at the 5% level of significance. In addition, the characteristic strength properties were also determined, for batch classification in the strength classes recommended by the Brazilian standard. Eucalyptus saligna had an apparent density of 0.58 g/cm3 and a basic density of 0.73 g/cm3. The mechanical properties, presented fc0 and fc0,k equal to 46.80 and 32 MPa, respectively. The results indicated that Eucalyptus saligna wood can be used in the construction of timber structures as structural member

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Variation in wood physical properties within stems of Guazuma crinita, a timber tree species in the Peruvian Amazon

Cited by 11 publications

References 18 publications

Physical and Mechanical Characterization of Three Egyptian Woody Species

Physical and Mechanical Characterization of Three Egyptian Woody Species

Deslocamentos excessivos em coberturas de madeira como condicionantes de patologias

Physical and mechanical properties of Eucalyptus saligna wood for timber structures

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