Influences of different drying climates on Eucalyptus camaldulensis wood properties

Ayşenur Kiliç Ak,Ahmet Tutuş,Mustafa Çiçekler,İbrahim Bektaş

doi:10.4067/s0718-221x2021000100452

Ayşenur Kiliç Ak, Ahmet Tutuş + Show 2 more

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https://doi.org/10.4067/s0718-221x2021000100452

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Abstract

One of the most important disadvantages of the wood material, whose usage is becoming more and more widespread, is the dimensional instability that occurs in its interaction with water. Therefore, studies to improve these drawbacks of wood, remain always up to date. For the mentioned purpose in this study, some chemical, morphological, physical and mechanical properties of Eucalyptus camaldulensis woods, which were naturally dried in outdoor and indoor climate in Eastern Mediterranean (KahramanmaraÅ province) atmosphere conditions of Turkey, were investigated. According to the results of the study, chemical properties of Eucalyptus woods dried indoor were measured as merely 0,23 % higher than dried ones outdoor. The results of morphological measurements indicated that the fiber dimensions of eucalypt wood dried in indoor were average 1,48 % lower than the ones dried out outdoor. Also, as a result of statistical analysis, it was found that there were significant differences (Ï < 0,000) between the physical properties of Eucalyptus wood samples indoor and outdoor according to the t-test. At the same time, as a result of the t-test applied to determine the effect of drying conditions on mechanical properties of Eucalyptus wood, modulus of elasticity, compression, tensile, dynamic bending and shear strength did not cause any significant difference between indoor and outdoor, while bending and Janka hardness strengths showed significant differences at Ï < 0,000 level. Finally, when the data obtained as a whole is considered, it can be said that testing of Eucalyptus wood which requires a very sensitive drying in different climates has important contributions on the subject. Regarding eucalypts, which has a high distribution area (20 million hectares) in the world, it is recommended to relevant institutions and organizations to expand and maintain such study in the future. Lastly, according to obtained data from this study, it can be said that the experiments of Eucalyptus woods which require a very delicate drying in different environments provide important contributions on the subject.

Highlights

One the most important disadvantages is the change in the dimensions of wood material during its interaction with water
The results of the tests to investigate effect of drying climate on the chemical, morphological, physical and mechanical properties of Eucalyptus woods can be summarized as follows; There was no significant difference between the chemical compositions of Eucalyptus woods dried in ID and OD
As a result of the physical tests, significant differences were found between the air-dry and oven-dry density, basic density, tangential shrinkage, tangential and longitudinal swelling values at the level of ρ < 0,05, while there was no significant difference between radial, volumetric-swelling, radial, longitudinal, volumetric-shrinkage

Summary

Introduction

One the most important disadvantages is the change in the dimensions of wood material during its interaction with water. As a result of the reduction of wood-based resources, demand for wood cannot be adequately met and price increases are higher than expected For these and similar reasons, the studies on reducing the objectionable aspects of the wood material and increasing their positive properties are always keep up-to-date (Kocaefe et al 2008, Aytin et al 2015, Cetin and Gunduz 2016). In dimensions of wood material, which is not dried sufficiently changes occurs such as shrinkage or swelling during utilization (Kantay 1993, Bergman 2021). Because of these changes, defects such as cracking, separation from joints, and deformation of wood material can take place (Ors and Keskin 2008). Wood has an elemental composition of about 50 % carbon, 6 % hydrogen, 44 % oxygen, and trace amounts of several metal ions (Pettersen 1984)

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