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KAYIN VE KAVAK KAPLAMALARIN MELAMİN FORMALDEHİT TUTKALI KULLANILARAK LAMİNE KAPLAMA KERESTE ÜRETİMİNE UYGUNLUĞU

SUITABILITY OF POPLAR AND BEECH LAMINAS FOR LAMINATED VENEER LUMBER MANUFACTURİNG USING MELAMINE FORMALDEHYDE ADHESIVE

Journal Name:

  • Mugla Journal of Science and Technology

Publication Year:

  • 2016

Key Words:

Keywords (Original Language):

Author NameUniversity of AuthorFaculty of Author
Abstract (2. Language): 
Laminated Veneer Lumber (LVL) has been proven their usefulness and efficiency as framing members (girders, beams, joist, headers, panels, etc.)in construction. Their application and manufacture is limited in Turkey. In this study, four different types of 7-layers LVLs were successfully manufactured using sawed beech (B) and poplar (P) veneers, and melamine formaldehyde (MF) adhesive. In this work, LVLs were formed with two veneers for each surface and three veneers for core layer. Produced four different types of LVL were coded based on the type and location of the veneers. BBBBBBB, BBPPPBB, PPPPPPP and PPBBBPP were called as Group I, Group II, Group III and Group IV, respectively. As physical properties, oven dry specific gravity (SG) and moisture content (MC) were determined according to TS 2472 (1976a) and TS 2471 (1976b) standards. Mechanical properties like glueline shear strength, modulus of rupture (MOR), modulus of elasticity (MOE) and compression strength (CS)(parallel to grain) were also determined according to EN 314-1 (2004),EN310 (1993) and TS 2595 (Anonymous 1977)standards, respectively. Based on this study, the highest strength and SG values were obtained with all beech used veneers (Group I). On the other hand lowest values were recorded with all poplar veneers (Group III). It should be noted that contribution rate of beech veneers in LVL had an increase on both strength and SG values.
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Abstract (Original Language): 
Lamine kaplama kereste (LVL) inşaat yapılarında kiriş, döşeme kirişi, başlıklar ve paneller gibi çerçeve üyeleri olarak etkili ve kullanışlı olduğunu ispatlamıştır. LVL’nin Türkiye’de uygulaması ve üretimi sınırlıdır. Bu çalışmada biçilmiş kayın ve kavak kaplamaları, melamin formaldehit (MF) tutkalı kullanılarak dört farklı tipte yedi tabakalı LVL’ler üretilmiştir. LVL’ler her dış tabaka için iki adet kaplama ve iç tabaka için üç adet kaplama olacak şekilde oluşturuldu. Üretilen LVL’ler kaplamaların kullanım yeri ve türüne bağlı olarak kodlandırıldı. BBBBBBB, BBPPPBB, PPPPPPP ve PPBBBPP sırasıyla I.grup, II. Grup, III. Grup ve IV. Grup olarak isimlendirildi. Fiziksel özellikler olarak fırın Kurusu özgül ağırlık ve rutubet değerleri TS 2472 (1976a) ve TS 2471 (1976b) standartlarına göre belirlendi. Yapışma mukavemeti, eğilme direnci, eğilmede elastikiyet modülü ve liflere paralel basınç direnci gibi mekanik özellikler sırasıyla EN 314-1 (2004), EN310 (1993) ve TS 2595 (1977) standartlarına göre belirlendi. Bu çalışmada en yüksek direnç ve yoğunluk değeri tamamı kayın kaplamalarından üretilen I. Grup LVL’lerde elde edildi. Diğer yandan en düşük değerler tamamı kavak kaplamalarından üretilen III. Grup LVL’lerde gözlemlendi. Kayın kaplamalarının LVL’ ye katılım oranının direnç ve yoğunluk değerlerinde bir artış sağladığı söylenebilir.
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  • Turkish

REFERENCES

References: 

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[6] Kurt, R., and Mengeloglu, F. The effect of boric acid/borax treatment on selected mechanical and combustion properties of poplar laminated veneer lumber, Wood Res-Slovakia 53(2), 2008.113-120.
[7] ASTM D899. Standard test method for applied weight per unit area of liquid adhesive, American Society for Testing Materials, Philadelphia. 1994.
[8] TS 2472.Wood, determination of density for physical and mechanical tests, Turkish Standard Institution, Ankara. 1976a.
[9] TS 2471. Wood, determination of moisture content for physical and mechanical tests,  Turkish Standard Institution, Ankara. 1976b.
[10] EN314-1. Plywood-Bonding quality Part 1: Test methods, European Standardization Committee, Brussels. 2004.
[11] Anonymous. An investigation and evaluation of laminated veneer lumber (LVL) manufactured from European hardwoods, Copernicus ELVE ( European Laminated Veneer Engineering) Project Final Report. 1997.
[12] EN 310, Wood Based Panels, Determination of Modulus of Elasticity in Bending and Bending Strength, European Committee for Standardization, Brusselles, Belgium. 1993.
TS 2595. Wood, determination of ultimate stress in compression parallel to grain, Turkish Standard Institution, Ankara. 1977.

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