Investigation of some surface properties of red pine wood exposed to outdoor conditions

Year 2022, , 83 - 92, 26.12.2022

Ümit Ayata

https://doi.org/10.33725/mamad.1184911

Abstract

Today, studies on natural and artificial aging applications are carried out on wooden materials. Even the same tree species shows different results when left in different outdoor areas. After the external and internal environment tests, changes occur on the wood material surfaces. This study was carried out on the investigation of some surface changes in the red pine (Pinus brutia) wood exposed to outdoor environmental conditions for 3 months in Bayburt City, Turkey. Color and glossiness values of wood materials were determined before and after weathering. Colour (ΔL*, Δa*, Δb*, ΔH*, ΔC*, ΔE*, L*, a*, b*, C* and, ho), whiteness index (perpendicular and parallel to the fibers) values and glossiness (perpendicular and parallel to the fibers at 20o, 60o and 85o) values of wood materials were determined before and after weathering. According to the results obtained, the results of the analysis of variance calculated for all tests were found to be significant. Compared to the control measurements, after the increase in weathering times, whiteness index values perpendicular and parallel to the fibers, L* and a* values decreased, C*, ho and b* values increased. In addition, ΔE* values at the end of 1st month, 2nd month and 3rd month were determined as 10.60, 10.58, and 11.65, respectively. As a result, colour, glossiness and whiteness index values changed with weathering applications.

Keywords

Natural Weathering, Red Pine, Colour, Glossiness, Whiteness Index

Dış ortam şartlarına maruz kalmış kızılçam odununda meydana gelen bazı yüzey özelliklerinin araştırılması

Abstract

Günümüzde ahşap malzemeler üzerinde doğal ve yapay yaşlandırma uygulamalarına ait çalışmalar yapılmaktadır. Aynı ağaç türü bile farklı dış ortamlara bırakıldığında farklı sonuçlar göstermektedir. Dış ve iç ortam testleri sonrasında ahşap malzeme yüzeylerinde değişiklikler meydana gelmektedir. Bu çalışma, Bayburt ili 3 ay süre ile dış ortam çevre şartlarına maruz kalmış kızılçam (Pinus brutia) odununda meydana gelen bazı yüzey değişiklerinin araştırılması üzerine yapılmıştır. Yaşlandırma işlemi sonralarında ve öncesinde ahşap malzemelerde renk (ΔL*, Δa*, Δb*, ΔH*, ΔC*, ΔE*, L*, a*, b*, C* ve ho), parlaklık (20o, 60o ve 85o’de liflere dik ve paralel) ve beyazlık indeksi (liflere dik ve paralel) değerleri belirlenmiştir. Elde edilen sonuçlara göre, Bütün testler için hesaplanmış olan varyans analizi sonuçlarının anlamlı olduğu görülmüştür. Kontrol ölçümlerine kıyasla yaşlandırma sürelerinin artması sonrasında, liflere dik ve paralel beyazlık indeksi değerleri, L* ve a* değerleri azalırken, C*, ho ve b* değerlerinin arttığı görülmektedir. Buna ek olarak, 1. ay, 2. ay ve 3. ay sonunda ΔE* değerleri sırasıyla 10.60, 10.58 ve 11.65 olarak belirlenmiştir. Sonuç olarak renk, parlaklık ve beyazlık indeksi değerleri yaşlandırma uygulamaları ile değişmiştir.

Keywords

Doğal Yaşlandırma, Kızılçam, Renk, Parlaklık, Beyazlık İndeksi, Natural Weathering, Red Pine, Colour, Glossiness, Whiteness Index

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