Performance properties of heat treated and reinforced laminated veneer lumber with glass fiber

Öz

Bu çalışmada, ısıl işlem uygulanmış sarıçam (Pinus sylvestris L.) odunundan hazırlanan deney örneklerinin bazı teknolojik özellikleri analiz edilmiştir. Bu amaçla, 140 °C, 160 °C, 180 °C ve 200 °C'de 3 saat süre ısıl işleme tabi tutulan malzemelerden deney örnekleri üretilmiştir. Tomruğun diri odun kısmından üç farklı deney grubu hazırlanmıştır. Birinci grup masif ahşap (ahşap), ikinci grup lamine kaplama kereste (LVL) ve üçüncü grup ise cam elyaf kumaş kullanılarak güçlendirilmiş lamine kaplama kerestedir (RLVL). Bu çalışmada tutkal olarak tek bileşenli poliüretan bazlı yapıştırıcı kullanılmıştır. Takviyenin LVL kompozit üzerindeki etkilerini analiz etmek için hava kuru yoğunluk, denge rutubet miktarı (EMC) ve liflere paralel basınç direnci değerleri belirlenmiştir. Deney sonuçları, ısıl işlem uygulanmış ve cam elyaf ile güçlendirilmiş LVL numunelerinin hava kurusu yoğunluk ve liflere paralel basınç direncini artırdığını göstermektedir. Öte yandan, deney örneklerinin EMC değerleri uygulanan ısıl işlem sıcaklıklarına ve yapılan güçlenndirme işlemine bağlı olarak azalmıştır. Isıl işlem uygulanmış ahşap malzemenin fiziksel ve mekanik özelliklerinin geliştirilmesi binalarda uygun alanlarda kullanımının yaygınlaşmasına katkı sağlayabilir.

Anahtar Kelimeler

• Reinforcement
• Glass Fiber
• Mechanical Properties
• Physical Properties

Performance properties of heat treated and reinforced laminated veneer lumber with glass fiber

Öz

In this study, some technological properties of test samples manufactured from heat-treated scotch pine (Pinus sylvestris L.) wood were analyzed. For this aim, experimental specimens were manufactured from heat-treated material at temperatures of 140 °C, 160 °C, 180 °C and 200 °C for 3 hours. Three different experimental groups were prepared from the sapwood of the log. The first group was massive wood (wood), the second group was laminated veneer lumber (LVL), and the third group was reinforced laminated veneer lumber (RLVL) using glass fiber fabric. One-component polyurethane based adhesive was used as a binder in this study. Air-dry density, equilibrium moisture content (EMC), and compressive strength parallel to the grain were determined to analyze the effects of the reinforcement on the LVL composite. Test results showed that reinforced heat-treated LVL samples with glass fibers increased both air dry density and compressive strength parallel to the grain. On the other hand, the EMC values of the test samples decreased with increasing heat treatment temperature and reinforcement process. Improving the some physical and mechanical properties of heat-treated wood material can contribute to the widespread use in buildings.

Anahtar Kelimeler

• Reinfırcement
• Glass Fiber
• Mechanical Properties
• Physical Properties

Kaynakça

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