Finger-jointed Eucalyptus globulus with 1C-PUR adhesive for high performance engineered laminated products

Lara-Bocanegra, Antonio José; Majano-Majano, Almudena; Crespo, José; Fernández, Manuel Guaita

doi:10.1016/j.conbuildmat.2017.01.004

Cited by 41 publications

(23 citation statements)

References 8 publications

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“…The abundance of the species and its great performance have recently lead to important experimental research using structural-size specimens with the aim of developing new structural products [6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties of Small Clear Specimens of Eucalyptus globulus Labill

et al. 2020

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Eucalyptus globulus Labill stands out as one of the hardwood species produced in Europe with prominent mechanical properties, which is undergoing a growing interest in extending added value. The development of engineered wood products with this species and its application in timber structures involving numerical finite element simulations requires knowledge of the mechanical properties for the different orthotropic material directions. The aim of the present study is to determine the main mechanical properties of E. globulus from small clear specimens, necessary for the development of finite element models. The work provides experimental results on the ultimate capacity and modulus of elasticity considering different stresses: tension parallel and perpendicular to the grain, compression parallel and perpendicular to the grain (in radial and tangential directions), shear and longitudinal static bending. The work is complemented with experimental data on timber-to-timber friction coefficients for 0°, 45°, and 90° orientation angles, which are useful in the modeling of traditional joints. Very high values of ultimate stress and modulus of elasticity for the different mechanical properties were obtained, highlighting the great potential of this species for structural applications.

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Section: Introductionmentioning

confidence: 99%

Mechanical Properties of Small Clear Specimens of Eucalyptus globulus Labill

et al. 2020

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“…The interest in fast-growing plantation species such as eucalypt is increasing as they may have the potential to ensure a sustainable supply of raw materials for producing mass laminated timber products for different structural building applications [1][2][3][4][5][6]. The goal of this study was to characterise the physical and mechanical properties of lumber obtained from a 16-year-old pulpwood Eucalyptus nitens (E. nitens) H.Deane & Maiden resource.…”

Section: Introductionmentioning

confidence: 99%

Characterisation of Physical and Mechanical Properties of Unthinned and Unpruned Plantation-Grown Eucalyptus nitens H.Deane & Maiden Lumber

Derikvand

Kotlarewski

Lee

et al. 2019

Forests

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The use of fast-growing plantation eucalypt (i.e., pulpwood eucalypt) in the construction of high-value structural products has received special attention from the timber industry in Australia and worldwide. There is still, however, a significant lack of knowledge regarding the physical and mechanical properties of the lumber from such plantation resources as they are mainly being managed to produce woodchips. In this study, the physical and mechanical properties of lumber from a 16-year-old pulpwood Eucalyptus nitens H.Deane & Maiden resource from the northeast of Tasmania, Australia was evaluated. The tests were conducted on 318 small wood samples obtained from different logs harvested from the study site. The tested mechanical properties included bending modulus of elasticity (10,377.7 MPa) and modulus of rupture (53 MPa), shear strength parallel (5.5 MPa) and perpendicular to the grain (8.5 MPa), compressive strength parallel (42.8 MPa) and perpendicular to the grain (4.1 MPa), tensile strength perpendicular to the grain (3.4 MPa), impact bending (23.6 J/cm2), cleavage (1.6 kN) and Janka hardness (23.2 MPa). Simple linear regression models were developed using density and moisture content to predict the mechanical properties. The variations in the moisture content after conventional kiln drying within randomly selected samples in each test treatment were not high enough to significantly influence the mechanical properties. A relatively high variation in the density values was observed that showed significant correlations with the changes in the mechanical properties. The presence of knots increased the shear strength both parallel and perpendicular to the grain and significantly decreased the tensile strength of the lumber. The results of this study created a profile of material properties for the pulpwood E. nitens lumber that can be used for numerical modelling of any potential structural product from such a plantation resource.

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“…Although finger joints influence the bending strength, this influence is likely to be negligible in boards with many defects, such as knots. For example, Lara-Bocanegra et al [43] showed that the bending strength of boards of Eucalyptus globulus with finger joints was 23% lower than that of boards made of “clear wood”. However, the characteristic values of the bending strength of the finger joint itself were up to 37% higher than that required for strength class D40 for sawn boards of this species.…”

Section: Resultsmentioning

confidence: 99%

Characterization and Structural Performance in Bending of CLT Panels Made from Small-Diameter Logs of Loblolly/Slash Pine

et al. 2018

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The main objective of this work was to study the structural viability of using small-diameter logs of Uruguayan Loblolly/Slash pine, mainly from thinning operations, to design cross-laminated timber (CLT) panels. A visual grade named “CTH” (coniferous thinning) was proposed, and 45 specimens of sawn timber boards were tested, resulting in 51% lower bending strength than that of the minimum strength class C14. Subsequently, 20 CLT panels were manufactured and experimentally tested, the results showed that the bending strength of the CLT panels was 43% above that of the individual layers. Additionally, the structural performance of the CLT panels for use in floors was calculated, and the thickness-span relationship depending on strength class and imposed load are presented. Results showed than the use of CTH timber to design CLT floors implies a volume (m3/m2) 17% higher than that using C24 timber.

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Finger-jointed Eucalyptus globulus with 1C-PUR adhesive for high performance engineered laminated products

Cited by 41 publications

References 8 publications

Mechanical Properties of Small Clear Specimens of Eucalyptus globulus Labill

Mechanical Properties of Small Clear Specimens of Eucalyptus globulus Labill

Characterisation of Physical and Mechanical Properties of Unthinned and Unpruned Plantation-Grown Eucalyptus nitens H.Deane & Maiden Lumber

Characterization and Structural Performance in Bending of CLT Panels Made from Small-Diameter Logs of Loblolly/Slash Pine

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