Effects of Weathering on Some Physical Properties of Wood

Budakçı, Mehmet; Karamanoğlu, Mehmet

doi:10.17475/kuofd.87880

Cited by 6 publications

(11 citation statements)

References 13 publications

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“…This means that the colours in this group of samples became redder after weathering (Figure ). Budakci and Karamanoglu found that natural beech wood gives redder colour values with weathering owing to its characteristic physical properties. The highest positive change to red colour (+Δ a *) was identified in the control and the Tanalith‐E‐impregnated samples, with no statistical difference found between them.…”

Section: Resultsmentioning

confidence: 99%

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Surface properties of tannin‐impregnated and varnished beech wood after exposure to accelerated weathering

Yalçın

Pelit

Akçay

2017

Coloration Technology

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The aim of this study was to determine selected surface properties of varnished beech wood impregnated with natural extracts after exposure to accelerated weathering. Beech wood samples were impregnated with aqueous solutions of 5 and 10% mimosa (Acacia mollissima) and quebracho (Shinopsis lorentzii) tannins. After weathering, colour changes (DL*, Da*, Db*, and DE*) in addition to scratch resistance and surface hardness values were calculated and evaluated. As a result of the weathering process, greater colour changes (DE*) were detected in the beech wood samples impregnated with tannins compared with the unimpregnated control samples. The least colour change occurred in the Tanalith-E-impregnated samples. Total colour change was adversely affected with tannin impregnation after the weathering processes. In terms of surface hardness and scratch resistance, the highest values were observed in the mimosa-solutionimpregnated and control samples. Furthermore, it was found that scratch resistance and hardness values tended to increase during the first period of weathering and decreased thereafter. Regarding surface properties, the best results were obtained when polyurethane varnish was employed compared with the other varnish types. Coloration Technology Society of Dyers and Colourists 334

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Section: Resultsmentioning

confidence: 99%

“…A previous study showed that the DL* value increased with tannin impregnation after weathering [21]. Budakci and Karamanoglu [23] found that natural beech wood gives redder colour values with weathering owing to its characteristic physical properties. No significant difference was found between varnish types in terms of DL*.…”

Section: Colour Changesmentioning

confidence: 96%

Surface properties of tannin‐impregnated and varnished beech wood after exposure to accelerated weathering

Yalçın

Pelit

Akçay

2017

Coloration Technology

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“…In another study, Scots pine, eastern beech, sessile oak, and chestnut woods were subjected to natural aging. It was reported that the highest gloss change occurred in Scots pine samples (Budakçı and Karamanoğlu 2014).…”

Section: Glossmentioning

confidence: 93%

“…This decrease is thought to be caused by the aging conditions and the physical and chemical factors that occur on the surface after the paint removal process. It is emphasized in the literature that the outdoor conditions have a decreasing effect on the hardness values of the wood material (Yalınkılıç et al 1999;Budakçı and Atar 2001;Baysal 2008;Budakçı and Karamanoğlu 2014;Küçüktüvek et al 2017).…”

Section: Hardnessmentioning

confidence: 99%

The use of environmentally friendly abrasive blasting media for paint removal from wood surfaces

Kilinç

Budakçı

Korkmaz

2022

BioRes

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This study determined some physical changes that occur on wood surfaces aged in a marine environment resulting from the removal of coatings using environmentally friendly media blasting. Scots pine (Pinus sylvestris L.) wood coated with water-borne and synthetic paints was exposed to a marine environment for 100 days. The aged paint layers were removed using five different media (sodium bicarbonate, hazelnut shell granules, corncob granules, walnut shell granules, and apricot kernel granules), varying blasting angles (45° and 90°), blasting distances (7 and 10 cm), air pressures (2 and 2.5 bar), and nozzle diameters (0.5 and 0.8 mm) using an automated blasting cabinet. The results showed that corn cob granules and sodium bicarbonate were less effective than other media for removing paint layers at the application parameters. The samples were tested for hardness, gloss, and total color change. Samples exhibited a remarkable total color change and gloss increase when the blasting distance was increased from 7 cm to 10 cm, while their hardness decreased. The highest gloss value was obtained on surfaces blasted with a nozzle diameter of 0.5 cm. Surfaces blasted with a nozzle diameter of 8 mm, however, yielded the highest total color change and hardest values.

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“…Weathering decelerates or inverts the spacing and condition of discontinuities from moderately to highly weathered due to cementation processes in discontinuities. Orgunsola et al [5] studied that rock strength decreases as water content increases due to a decrease in the coefficient of internal friction of the rock particles. Additionally, the presence of water in rock increases its deformability.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of physical and mechanical properties of intact sandstones through the Analytic Hierarchy Process (AHP)

Ghazali

Yusof²,

Hamzah³

2023

IOP Conf. Ser.: Earth Environ. Sci.

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One of the most significant factors affecting the strength and deformation of intact rocks is weathering, which drastically reduces the rocks’ properties. This study used the Analytical Hierarchy Process model to assess the ranking of strength and physical nature of intact sandstone samples from various locations. The AHP analyses considered fine-grained sandstones, four evaluation criteria, and five different Malaysian locations. When the weathering grade decreases, the strength of the rock increases. Weathering causes decrease in dry unit weight and an increase in porosity. The porosity of weak rock materials influences their strength. The effect is more obvious in grade IV materials, where dry and wet conditions can significantly impair rock strength. According to the AHP analysis results, those diverse sites have distinct attributes in terms of numerous evaluation criteria, depending on the location and its geological features. Based on the general evaluation points in this study, Puncak Perdana were found to have the highest rock strength, whereas Kempas presented the lowest rock strength in general. In addition, Beris Dam, Bukit Indah to Mersing, and Desa Tebrau could be declared as second, third and fourth, respectively, in presenting the rock strength quality of various sandstones samples.

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Effects of Weathering on Some Physical Properties of Wood

Cited by 6 publications

References 13 publications

Surface properties of tannin‐impregnated and varnished beech wood after exposure to accelerated weathering

Surface properties of tannin‐impregnated and varnished beech wood after exposure to accelerated weathering

The use of environmentally friendly abrasive blasting media for paint removal from wood surfaces

Evaluation of physical and mechanical properties of intact sandstones through the Analytic Hierarchy Process (AHP)

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