The synergistic effect of silica fume and fly ash on the physical and mechanical properties of cement-bonded particleboards

Hüsnü Yel

Makale detayları

The synergistic effect of silica fume and fly ash on the physical and mechanical properties of cement-bonded particleboards

Yazarlar:

Hüsnü Yel

Yayıncı:

Cankiri Karatekin University

Ana Başlıklar:

Ahşap İşleme

Dergi:

Anadolu Orman Araştırmaları Dergisi Vol.11 Issue 1, pp.85-91

Belge Tipi:

Makale

Yayın Tarihi:

6/2025

Belge Dili:

Türkçe

Document ID (Org No.):

2001338781

pISSN:

1309-856X

Anahtar kelimeler:

Özet:

 Background and Aims In this study, the usability of silica fume and fly ash, industrial by-products, as substitutes for cement in the production of cement-bonded particleboard was investigated to reduce greenhouse gas emissions from cement production, increase energy savings, protect natural resources, and lower production costs. Methods For this purpose, experimental cement-bonded particleboards were produced by partially replacing Portland cement with varying proportions of silica fume 2.5, 5, 7.5, 10, and 12.5 and fly ash 2.5, 5, 7.5, 10, and 12.5. The experimental boards were designed with a target density of 1200 kgm³, a wood-to-cement ratio of 12.5, and dimensions of 450 mm  450 mm  10 mm in a single-layer configuration. After a 28-day curing process, the cement-bonded particleboards were subjected to tests for density, moisture content, water absorption, thickness swelling, bending strength, modulus of elasticity in bending, screw withdrawal resistance, and internal bond strength. The obtained data were statistically analyzed and compared to standard requirements. Results As the usage of silica fume and fly ash increased the water absorption and thickness swelling values of the boards also increased. The silica fume-fly ash mixture increased the density of the boards while reducing their moisture content. While flexural strength, modulus of elasticity in bending, and screw withdrawal resistance initially exhibited a decline, these properties improved after a certain threshold. The replacement of up to 15 of cement with silica fume-fly ash mixture did not cause a statistically significant reduction in internal bond strength. Conclusion Although there were slight decreases in mechanical strength properties, all board groups met the values specified in the TS EN 634-2 standard except for thickness swelling. Consequently, it was concluded that cement-bonded particleboards for structural use can be produced by using a mixture of silica fume 12.5-fly ash 12.5 up to 25 as a substitute for cement.

 Background and Aims In this study, the usability of silica fume and fly ash, industrial by-products, as substitutes for cement in the production of cement-bonded particleboard was investigated to reduce greenhouse gas emissions from cement production, increase energy savings, protect natural resources, and lower production costs. Methods For this purpose, experimental cement-bonded particleboards were produced by partially replacing Portland cement with varying proportions of silica fume 2.5, 5, 7.5, 10, and 12.5 and fly ash 2.5, 5, 7.5, 10, and 12.5. The experimental boards were designed with a target density of 1200 kgm³, a wood-to-cement ratio of 12.5, and dimensions of 450 mm  450 mm  10 mm in a single-layer configuration. After a 28-day curing process, the cement-bonded particleboards were subjected to tests for density, moisture content, water absorption, thickness swelling, bending strength, modulus of elasticity in bending, screw withdrawal resistance, and internal bond strength. The obtained data were statistically analyzed and compared to standard requirements. Results As the usage of silica fume and fly ash increased the water absorption and thickness swelling values of the boards also increased. The silica fume-fly ash mixture increased the density of the boards while reducing their moisture content. While flexural strength, modulus of elasticity in bending, and screw withdrawal resistance initially exhibited a decline, these properties improved after a certain threshold. The replacement of up to 15 of cement with silica fume-fly ash mixture did not cause a statistically significant reduction in internal bond strength. Conclusion Although there were slight decreases in mechanical strength properties, all board groups met the values specified in the TS EN 634-2 standard except for thickness swelling. Consequently, it was concluded that cement-bonded particleboards for structural use can be produced by using a mixture of silica fume 12.5-fly ash 12.5 up to 25 as a substitute for cement.

 Background and Aims In this study, the usability of silica fume and fly ash, industrial by-products, as substitutes for cement in the production of cement-bonded particleboard was investigated to reduce greenhouse gas emissions from cement production, increase energy savings, protect natural resources, and lower production costs. Methods For this purpose, experimental cement-bonded particleboards were produced by partially replacing Portland cement with varying proportions of silica fume 2.5, 5, 7.5, 10, and 12.5 and fly ash 2.5, 5, 7.5, 10, and 12.5. The experimental boards were designed with a target density of 1200 kgm³, a wood-to-cement ratio of 12.5, and dimensions of 450 mm  450 mm  10 mm in a single-layer configuration. After a 28-day curing process, the cement-bonded particleboards were subjected to tests for density, moisture content, water absorption, thickness swelling, bending strength, modulus of elasticity in bending, screw withdrawal resistance, and internal bond strength. The obtained data were statistically analyzed and compared to standard requirements. Results As the usage of silica fume and fly ash increased the water absorption and thickness swelling values of the boards also increased. The silica fume-fly ash mixture increased the density of the boards while reducing their moisture content. While flexural strength, modulus of elasticity in bending, and screw withdrawal resistance initially exhibited a decline, these properties improved after a certain threshold. The replacement of up to 15 of cement with silica fume-fly ash mixture did not cause a statistically significant reduction in internal bond strength. Conclusion Although there were slight decreases in mechanical strength properties, all board groups met the values specified in the TS EN 634-2 standard except for thickness swelling. Consequently, it was concluded that cement-bonded particleboards for structural use can be produced by using a mixture of silica fume 12.5-fly ash 12.5 up to 25 as a substitute for cement.

 Giriş ve Hedefler Bu çalışmada; çimento üretimi kaynaklı sera gazı emisyonunun azaltılması, enerji tasarrufunun arttırılması, doğal kaynakların korunması ve üretim maliyetlerinin düşürülmesi amacıyla bir endüstri yan ürünü olan silis dumanı ve uçucu külün çimentolu yongalevha üretiminde çimentoya ikame olarak birlikte kullanılabilirliği araştırılmıştır. Yöntemler Bu amaçla, Portland çimentosuna ikame olarak farklı oranlarda silis dumanı 2,5, 5, 7,5, 10 ve 12,5 ve uçucu kül 2,5, 5, 7,5, 10 ve 12,5 karışımları kullanılarak, 1200 kgm3 hedef yoğunluk, 12,5 odun-çimento oranı, 450 mm x 450 mm x 10 mm boyutunda tek tabakalı çimentolu yongalevhalar üretilmiştir. 28 gün kürleme işleminden sonra çimentolu yongalevhalar; yoğunluk, rutubet, su alma, kalınlık artımı, eğilme direnci, eğilmede elastikiyet modülü, vida tutma direnci ve yüzeye dik çekme direnci testlerine tabi tutulmuştur. Elde edilen verilerin istatistik analizi yapılarak standart değerlerle karşılaştırılmıştır. Bulgular Silis dumanı-uçucu kül kullanımı arttıkça levhaların su alma ve kalınlık artımı değerleri de artmıştır. Silis dumanı-uçucu kül karışımı levhaların yoğunluğunu artırırken rutubet değerini düşürmüştür. Silis dumanı-uçucu kül kullanımı artıkça, eğilme direnci, eğilmede elastikiyet modülü ve vida tutma direnci değerlerinde önce düşüş daha sonra bir artış gerçekleşmiştir. Çimentoya 15 oranına kadar silis dumanı-uçucu kül ikamesi yüzeye dik çekme direnci değerinde istatistiksel olarak bir önemli bir düşüşe neden olmamıştır. Sonuç Direnç değerlerinde az da olsa düşüşler gerçekleşse de tüm levha grupları TS EN 634-2 standardındaki değerleri kalınlık artımı hariç karşılamaktadır. Bu nedenle, çimentoya ikame olarak 25 oranına kadar silis dumanı 12,5-uçucu kül 12,5 karışımı kullanılarak yapısal kullanım amaçlı çimentolu yongalevhaların üretilebileceği sonucuna varılmıştır.

Makale detayları

The synergistic effect of silica fume and fly ash on the physical and mechanical properties of cement-bonded particleboards

Yazarlar:

Hüsnü Yel

Yayıncı:

Cankiri Karatekin University

Ana Başlıklar:

Ahşap İşleme

Dergi:

Anadolu Orman Araştırmaları Dergisi Vol.11 Issue 1, pp.85-91

Belge Tipi:

Makale

Yayın Tarihi:

6/2025

Belge Dili:

Türkçe

Document ID (Org No.):

2001338781

pISSN:

1309-856X

Cement-bonded particleboards

physical properties

mechanical properties

silica fume

fly ashÇimentolu yongalevha

fiziksel özellikler

mekanik özellikler

silis dumanı

uçucu kül

Sayı

Makale detayları

Yazarlar: Hüsnü Yel

Yayıncı: Cankiri Karatekin University

Ana Başlıklar: Ahşap İşleme

Dergi: Anadolu Orman Araştırmaları Dergisi Vol.11 Issue 1, pp.85-91

Belge Tipi: Makale

Yayın Tarihi: 6/2025

Belge Dili: Türkçe

Document ID (Org No.): 2001338781

pISSN: 1309-856X

Sayı

Yazarlar:

Hüsnü Yel

Yayıncı:

Cankiri Karatekin University

Ana Başlıklar:

Ahşap İşleme

Dergi:

Anadolu Orman Araştırmaları Dergisi Vol.11 Issue 1, pp.85-91

Belge Tipi:

Makale

Yayın Tarihi:

6/2025

Belge Dili:

Türkçe

Document ID (Org No.):

2001338781

pISSN:

1309-856X