Mermer Atıklarının Düz Presleme Yöntemiyle Üretilen Odun Plastik Kompozitlerinde Değerlendirilmesi

Bu çalışmada, dünya rezervlerinin önemli bir kısmı ülkemizde olan mermer cevherinin işlenmesi sırasında ortaya çıkan atıkların odun plastik kompozitlerinin (OPK) üretiminde değerlendirilmesi incelenmiştir. Bu amaçla farklı oranlarda mermer atıkları (%0, 10, 15, 20, 25, 30) odun ve plastik ile karıştırılarak düz presleme yöntemiyle OPK üretimi gerçekleştirilmiştir. Mermer atıklarının OPK’nın bazı fiziksel ve mekanik özelliklerini nasıl etkilediği incelenmiştir. Bu amaçla levhaların su alma ve kalınlığa şişme değerine bakılmıştır. Odun unu oranının azalması hidrofobik karakterde bir yapının ortaya çıkmasını sağlamıştır. Böylece artan mermer atığı oranı su alma ve kalınlığa şişme değerlerini önemli oranda iyileştirmiştir. Bunun aksine mermer atıkları mekanik özelliklerin azalmasına neden olmuştur. Eğilme direnci ve vida tutma direnci değerlerinde sırasıyla %26 ve %38’e varan azalmalar meydana gelmiştir. Eğilmede elastikiyet modülü ise önce düşmüş ardından artışa geçmiştir. Çekme direnci değerlerinde meydana gelen kayıp ise daha düşük olmuştur. LOI test sonuçları mermer atıklarının yanma direncini arttırdığını göstermiştir.

Anahtar Kelimeler:

Mermer atıkları, OPK, fiziksel ve mekanik özellikler, LOI

Evaluation of Marble Waste in Wood Plastic Composites Produced by Flat Pressing Method

In this study, the evaluation of marble wastes in the production of wood-plastic composites (WPCs) was evaluated. For this purpose, different ratios of marble waste (0, 10, 15, 20, 25, 30) were mixed with wood and plastic to produce WPCs by flat pressing method. The effects of marble waste on some physical and mechanical properties of WPCs were investigated. For this purpose, the WPCs' water absorption and thickness swelling values were examined. The decrease in the wood flour resulted with a better hydrophobic structure. Therefore, increasing marble waste improved the resistance to water absorption and thickness swelling properties significantly. On the contrary, marble wastes caused a decrease in mechanical properties. Reductions up to 26% and 38% occurred in flexural strength and screw withdrawal strength, respectively. The modulus of elasticity first decreased and then increased. The decrease in tensile strength, on the other hand, was more moderate. According to LOI test results, marble waste has also increased the flammability resistance.

Keywords:

Marble waste, WPC, physical and mechanical properties, LOI,

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