Investigation of some technological properties of cement-bonded particleboards manufactured from planer shavings of CCA-treated scotch pine woods

Öz

This study investigates the effects of wood/cement ratio and press temperature on the mechanical, physical and thermal properties of cement-bonded particleboards manufactured from the planer shavings of copper-chromium-arsenic (CCA) treated scotch pine (Pinus sylvestris L.) woods. For this purpose, single-layer cement-bonded particleboards were produced in a target density of 1200 kg/m3 and a dimension of 500 mm x 500 mm x10 mm using three different wood-cement ratios (1/2, 1/2.5 and 1/3) and two different press temperatures (20 ℃ and 60 ℃). The experimental boards produced were evaluated in terms of physical (moisture content, density, water absorption, and thickness swelling), mechanical (modulus of rupture, modulus of elasticity, internal bond strength, screw withdrawal resistance), and thermal (TGA/DTG) properties. The results demonstrated that increasing press temperature significantly improved the mechanical and physical properties of the boards. An increase in wood-cement ratio improved bending strength and screw withdrawal resistance and decreased internal bond strength and modulus of elasticity. In addition, the high wood-cement ratio led to an increase in the water absorption and the thickness swelling. TGA results revealed that an increase in cement ratio and press temperature led to a significant improvement in the cement hydration products. In general, all the boards made from CCA-treated planer shavings met the requirements specified in EN 634-2 standard.

Anahtar Kelimeler

• Cement-Bonded Particleboard
• CCA-Treated Wood Planer Shavings
• Wood-Cement Ratio
• Press Temperature
• Physical Properties
• Mechanical Properties

CCA ile emprenyeli sarıçam planya artıklarından üretilen çimentolu yongalevhaların bazı teknolojik özelliklerinin incelenmesi

Öz

Bu çalışmanın amacı, bakır-krom-arsenik (CCA) ile emprenyeli sarıçam (Pinus sylvestris L.) planya artıkları kullanılarak üretilen çimentolu yongalevhaların mekanik, fiziksel ve termal özellikleri üzerine odun/çimento oranı ve pres sıcaklığının etkisini araştırmaktır. Bu amaçla, 3 farklı odun-çimento oranı (1/2, 1/2.5 ve 1/3) ve 2 farklı pres sıcaklığı (20 ℃ ve 60 ℃) kullanılarak 1200 kg/m3 hedef yoğunluk ve 500 mm x 500 mm x 10 mm boyutuna sahip tek tabakalı çimentolu yongalevhalar üretilmiştir. Üretilen levhalar, fiziksel (rutubet, yoğunluk, su alma ve kalınlığına şişme oranı), mekanik (eğilme direnci, eğilmede elastikiyet modülü, yüzeye dik çekme direnci ve vida tutma direnci) ve termal (TGA/DTG) özellikler açısından incelenmiştir. Elde edilen sonuçlara göre, pres sıcaklığının artması levhaların mekanik ve fiziksel özelliklerinde önemli bir iyileşme sağlamıştır. Levhada odun-çimento oranın artması, eğilme direnci ve vida tutma direncini artırırken, eğilmede elastikiyet modülü ve yüzeye dik çekme direncini düşürmüştür. Diğer taraftan, odun/çimento oranı artıkça, su alma ve kalınlığına şişme oranları da artmıştır. TGA sonuçlarına göre, odun-çimento oranın azalması ve pres sıcaklığının artması, levhalarda çimento hidratasyon ürünlerinin artmasına neden olmuştur. Genel olarak, CCA ile emprenyeli planya artıklarından üretilen tüm levhalar, EN standardında belirtilen değerleri karşılamıştır.

Anahtar Kelimeler

• Çimentolu yongalevha
• CCA emrenyeli sarıçam planya atığı
• odun/çimento oranı
• pres sıcaklığı
• fiziksel özellikler
• mekanik özellikler

Kaynakça

1. Aro M (2008) Wood Strand Cement Board. In: Proceedings of 11th Intetnational Inorganic-Bonded Fiber Composites Conference. Madrid, İspanya, pp 169-179.
2. Ashori A, Tabarsa T, Amos F (2012) Evaluation of using waste timber railway sleepers in wood–cement composite materials. Construction and Building Materials 27: 126–129.
3. ASTM D1037 (2006) Standard test method for evaluating properties of wood-based fibes and particle panel materials. ASTM, ABD.
4. Brahmia FZ, Horvath PG, Alpar TL (2020) Effect of pre-treatments and additives on the improvement of cement wood composites: a review. BioResources 15(3): 7288-7308.
5. Castro V, Parchen C, Iwakiri S (2018) Particle sizes and wood/cement ratio effect on the production of vibro-compacted composites. Floresta e Ambiente 25(4): e20150213.
6. Huang C ve Cooper PA (2000) Cement-bonded particleboard using CCA-treated wood removed from service. Forest Products Journal 50(6): 49-56.
7. Kalaycıoğlu H, Özen R (2012) Yongalevha endüstrisi ders notları. Karadeniz Teknik Üniversitesi, Orman Fakültesi Yayını, No: 89, Trabzon.
8. Kasai Y, Kawamura M, Zhou JD (1998) Study on wood chip concrete with used timber. In: Proceedings of Fourth CANMET/ACI/JCI International Conference. Tokushima, Japonya, pp 905–928.

9. Kochova K, Gauvin F, Schollbach K, Brouwers HJH (2020) Using alternative waste coir fibres as a reinforcement in cement-fibre composites. Construction and Building Materials 231:1-10.
10. Marzuki AR, Rahim S, Hamidah M, Ruslan RA (2011) Effects of wood: cement ratio on mechanical and physical properties of three-layered cement-bonded particleboards from Leucaena leucocephala. Journal of Tropical Forest Science 23(1): 67-72.
11. Moslemi AA, Pfister SC (1987) The infulence of cement-wood ratio and cement type on bending strength and dimensional stability of wood- cement composite panels. Wood Fiber Science 19: 165-175.
12. Nasser RA, Salem MZM, Al-Mefarrej HA, Aref İM (2016) Use of tree pruning wastes for manufacturing of wood reinforced cement composites. Cement and Concrete Composites 72: 246-256.
13. Nasser R A, Al-Mefarrej HA, Abdel-Aal MA, Alshahrani TS (2014) Effects of tree species and wood particle size on the properties of cement-bonded particleboard manufacturing from tree prunings. Journal of Environmental Biology 35: 961-971.
14. Oyagade AO (1998) Effects of extractive Removal from Gmelina arborea wood on the reaction of ordinary portland cement-wood water system. Africa Journal of Science 2(1): 54-63.
15. Papadopoulos AN, Ntalos GA, Kakaras I (2006) Mechanical and physical properties of cement-bonded OSB. European Journal of Wood and Wood Products 64: 517-518.
16. Qi H, Cooper PA, Wan H (2006) Effect of carbon dioxide injection on production of wood cement composites from waste medium density fiberboard (MDF). Waste Management 26: 509–515.
17. Quiroga A, Marzocchi V, Rintoul I (2016) Influence of wood treatments on mechanical properties of wood-cement composites and of Populus Euroamericana wood fibers, Composites Part B: Engineering 84: 25-32.
18. Rana MN, Islam MN, Nath SK, Das AK, Ashaduzzaman M, Shams MI (2020) Influence of chemical additive on the physical and mechanical properties of cement - bonded composite panels made from jute stick. Journal of Building Engineering 31: 1-6.
19. Savastano JR, Warden PG, Coutts RS (2003) Potential of alternative fibre cements as building materials for developing areas. Cement and Concrete composites 25(6): 585-592.
20. Semple E, Evans PD (2004) Suitability of Western Australian mallee eucalypt, blue gum and melaleucas, Rural Industries Research and Development Corporation, Publication 4 (102), Kingston, Avustralya.
21. Tang Y, Su H, Huang S, Qu C, Yang J (2017) Effect of curing temperature on the durability of concrete under highly geothermal environment, Advances in Materials Science and Engineering 2017: 1-9.
22. TS EN 197-1 (2012)Çimento - Bölüm 1: Genel çimentolar - Bileşim, özellikler ve uygunluk kriterleri. TSE, Ankara. TS EN 322 (1999) Ahşap esaslı levhalar-rutubet miktarının tayini, TSE, Ankara.
23. TS EN 323 (1999) Ahşap esaslı levhalar-birim hacim ağırlığının tayini, TSE, Ankara.
24. TS EN 317 (1999) Yonga levhalar ve lif levhalar-su içerisine daldırma işleminden sonra kalınlığına şişme tayini. TSE, Ankara.
25. TS EN 310 (1999) Ahşap esasli levhalar-eğilme dayanimi ve eğilme elastikiyet modülünün tayini. TSE, Ankara.
26. TS EN 319 (1999) Yonga levhalar ve lif levhalar-levha yüzeyine dik çekme dayaniminin tayini. TSE, Ankara.
27. TS EN 320 (2011) Yonga levhalar ve lif levhalar-vida tutma mukavemetinin tayini. TSE, Ankara.
28. TS EN 634-2 (2009) Çimentolu yonga levhalar - özellikler - bölüm 2: kuru, nemli ve açık hava şartlarında kullanılan normal Portland çimentosu (NPÇ) ile yapıştırılmış yonga levhaların özellikleri. TSE, Ankara.
29. TS EN 634-1 (1999) Çimentolu yonga levhalar- özellikler- bölüm 1: genel özellikler. TSE, Ankara.
30. Wang L, Chen L, Tsang DCW, Guo B, Yang J, Shen Z, Hou D, Ok YS, Poon CS (2020) Biochar as green additives in cement-based composites with carbon dioxide curing, Journal of Cleaner Production 258: 1-8.
31. Yel H, Donmez Cavdar A, Boran Torun S (2020) Effect of press temperature on some properties of cement bonded particleboard. Maderas Cienc Tecnol 22(1): 83–92.
32. Yel H (2015) Bazı üretim faktörlerinin çimentolu yongalevhaların özellikleri üzerine etkileri. Karadeniz Teknik Üniversitesi Fen Bilimleri Enstitüsü Doktora Tezi, Trabzon, 225s.