Effect of High-Temperature Treatment on the Mechanical Properties of Rowan (<i>Sorbus aucuparia</i>L.) Wood

Korkut, Süleyman; Budakçı, Mehmet

doi:10.1080/07373930903267161

Cited by 49 publications

(34 citation statements)

References 19 publications

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“…Similar results have been reported by Srinivas andPandey (2012), Cademartori et al (2012), and Bak and Nemeth (2012). In another study, Korkut and Budakçı (2010) reported that expansion of mountain ash (Sorbus aucuparia L.) decreased 25.68%, 25.10%, and 26.08%, respectively, on the radial, tangential, and longitudinal surfaces after heat treatment. Altınok et al (2010) concluded that there was volumetric shrinkage and expansion decrease in heat-treated black pine (Pinus nigra var.…”

Section: Introductionsupporting

confidence: 78%

The Effects of Heat Treatment with the ThermoWood® Method on the Equilibrium Moisture Content and Dimensional Stability of Wild Cherry Wood

Aytin¹,

Korkut²,

Öner³

2015

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Low hygroscopicity is an important factor favoring the use of heat-treated wood materials. Hence, wild cherry (Cerasus avium (L.) Moench) wood was subjected to heat treatment with the ThermoWood ® method for about 1 and 2 hours at temperatures of 190 and 212 °C in an industrial business. Then, trial samples were prepared and divided into two groups. By being conditioned in the environments of 20 °C and 65% relative humidity (WC1), 20 °C and 85% relative humidity (WC2), 20 °C and 30% relative humidity (WC3), and 23 °C and 50% relative humidity (WC4), equilibrium moisture content (EMC) and dimensional stability (DS) values of the samples in the first group were determined. The water thickness swelling (WTS) and water retention (WR) features of the samples of the second group were examined by keeping them in water both 24 and 72 h. The results show that EMC and WTS decreased with increasing treatment temperature and durations. Also, DS was improved. On the other hand, the WR values of all the samples stayed approximately the same.

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Section: Introductionsupporting

confidence: 78%

The Effects of Heat Treatment with the ThermoWood® Method on the Equilibrium Moisture Content and Dimensional Stability of Wild Cherry Wood

Aytin¹,

Korkut²,

Öner³

2015

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“…However, the Fmax decreased by 51% in relation to the control samples. In contrast to what was observed by Korkut and Budakçi (2009), there was no relation between the heating temperature and Fmax loss. This change occurred because of the attenuation effect promoted by the freezing stage which avoided excessive thermal decomposition of wood .…”

Section: Mechanical Propertiescontrasting

confidence: 53%

“…Of all the wood properties, Fmax is often affected by the heating treatments, in which its decrease is directly proportional to the increase of both time and temperature of treatment (Korkut and Budakçi 2009). The same authors found reductions of 16.33% and 32.25% in Fmax of Sorbus aucuparia wood after 6 h of treatment at 150 and 180 °C, respectively.…”

Section: Mechanical Propertiesmentioning

confidence: 49%

Physical and Mechanical Properties of Fast-Growing Wood Subjected to Freeze-Heat Treatments

et al. 2016

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The physical and mechanical performance of wood from the rose gum (Eucalyptus grandis) and the Gympie messmate (Eucalyptus cloeziana) species were investigated. The wood samples were treated with a twostage freeze-heat thermal process. Fast-growing trees were used for preparing test samples, which were subjected to thermal treatments. The freezing stage had the treatment temperature fixed at -22 °C for 72 h, while the temperature of the heat stage ranged from 180 to 200 °C for 3.5 h. The measurements of mass loss, density, and equilibrium moisture content were determined to better understand the mechanical properties. Static bending, compression parallel to grain, Janka hardness, and impact tests were applied to reveal changes in the mechanical behavior of the treated wood. In general, the freezing stage decreased the mass loss and increased the moisture content of wood (when combined with the heating stage), which showed the opposite trend for the heating stage. Modulus of elasticity and compression strength were increased only after the heating stage, while decrements were found for modulus of rupture, impact strength, and Janka hardness. The two-stage treatments did not prevent a decrease in the mechanical properties; however, they were helpful in preventing higher mechanical resistance losses in hardness (the Gympie messmate) and impact resistance (the rose gum).

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“…In earlier studies, many researchers reported that heat treated wood can be utilized for outdoor applications such as exterior cladding, garden furniture, window and door frames, due to the enhanced dimensional stability. Furthermore, such woods gives better durability for coating (Yildiz et al 2006, Gunduz et al 2008, Korkut and Budakci 2010. As a result of the improvoment of their dimensional stability, it can be said for the present study that heat treated pine and beech can be effectively utilized in areas where they had limited use before.…”

Section: Resultsmentioning

confidence: 77%

“…It may be also said that heat treatment is a method that refers widely to reduce the negative effects of volumetric swelling and shrinkage. In the existing literature, many experimental studies for better understanding the impact of heat treatment on the amount of volumetric shrinkage and swelling of wood have been conducted so far (Esteves et al 2007, Gunduz et al 2008, Korkut and Budakci 2010. These studies have revealed that a large number of temperature and time values have to be investigated to detect a change in the swelling and shrinkage behavior of wood because of heat treatment.…”

Section: Introductionmentioning

confidence: 99%

Analysis of volumetric swelling and shrinkage of heat treated woods: Experimental and artificial neural network modeling approach

Tiryaki

Bardak

Aydın

et al. 2016

Maderas, Cienc. tecnol.

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Shrinkage and swelling characteristics of wood as a hygroscopic material affect negatively its effective utilization for a variety of applications. Heat treatment is widely used for minimizing the negative effects of volumetric swelling and shrinkage of wood. The present study aims to develop artificial neural network (ANN) models for predicting volumetric swelling and shrinkage of heat treated woods. For this purpose, wood samples were subjected to heat treatment at varying temperatures (130, 150, 170 and 190 ºC) for varying durations (2, 4, 6 and 8 h). Experimental results have showed that volumetric swelling and shrinkage of wood decreased by heat treatment. Then, neural networks models capable of predicting the swelling and shrinkage of the treated woods were developed based on the resulting data. It was seen that ANN models allowed volumetric swelling and shrinkage of such woods to predict successfully with a limited set of experimental data. This approach was able to predict volumetric swelling and shrinkage of wood with a mean absolute percentage error equal to 2,599% and 2,647% in test phase, respectively. The developed models might thus serve as a robust tool to predict volumetric swelling and shrinkage with less number of experiments.

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Effect of High-Temperature Treatment on the Mechanical Properties of Rowan (Sorbus aucupariaL.) Wood

Cited by 49 publications

References 19 publications

The Effects of Heat Treatment with the ThermoWood® Method on the Equilibrium Moisture Content and Dimensional Stability of Wild Cherry Wood

The Effects of Heat Treatment with the ThermoWood® Method on the Equilibrium Moisture Content and Dimensional Stability of Wild Cherry Wood

Physical and Mechanical Properties of Fast-Growing Wood Subjected to Freeze-Heat Treatments

Analysis of volumetric swelling and shrinkage of heat treated woods: Experimental and artificial neural network modeling approach

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