FARKLI TANE BOYUTUNA SAHİP ÖĞÜTÜLMÜŞ ATIK MISIR KOÇANININ ALÇI ESASLI KOMPOZİTLERDE DEĞERLENDİRİLMESİ
Abstract
Bu çalışmada tarımsal bir atık olan mısır koçanının alçı esaslı kompozitlerde kullanımı araştırılmıştır. Mısır koçanları 5,6 mm, 4 mm ve 2 mm olmak üzere 3 farklı boyutta öğütülmüştür. Mısır koçanları hacimce %20, %40 ve %60 oranlarında alçı karışımlarına eklenmiştir. 40x40x160 mm örnekler üretilmiş ve üretilen alçı esaslı kompozitlere birim ağırlık, ultrasonik ses geçiş hızı, su emme, kılcal su emme ve görünür porozite testleri uygulanmıştır. 200x160x20 mm boyutunda plaklar üretilerek örneklerin ısıl iletim katsayıları ölçülmüştür. Mekanik özelliklerinin değerlendirilmesi için ise basınç ve eğilme mukavemeti testleri uygulanmıştır. Mısır koçanı içeren örneklerin birim hacim ağırlıkları azalmıştır. Aynı zamanda ultrasonik ses geçiş hızları da düşmüştür. Görünür porozite değerlerin ise artırmıştır. Buna bağlı olarak örneklerin ısıl iletim katsayılarında da bir düşüş gözlenmiştir, su emme ve kılcal su emme değerleri ise yükselmiştir. Eğilme ve basınç dayanımı değerleri ise düşmüştür. Öğütülmüş mısır koçanının incelmesi görünür porozite değerlerini yükseltmiştir. İncelik arttıkça birim hacim ağırlık ve ultrasonik ses geçiş hızı değerleri azalmıştır. Isıl iletim katsayısı, eğilme ve basınç dayanımı da düşmüştür. Su emme ve kılcal su emme değerleri ise yükselmiştir. Üretilen örnekleri mekanik özellikleri bir miktar zayıflasa da daha hafif ve ısıl iletkenlik katsayısı daha düşük ürünlerin elde edilebilmiş olması, ürünün yalıtım amacı ve bölme elemanı olarak değerlendirilebileceği düşüncesini oluşturmaktadır.
References
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- Binici, H., Aksogan, O., & Demirhan, C. (2016). Mechanical, thermal and acoustical characterizations of an insulation composite made of bio-based materials. Sustainable Cities and Society, 20, 17–26. https://doi.org/10.1016/j.scs.2015.09.004
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- Mısır Durum Tahmin Raporu 2021/2022, T.C. Tarım ve Orman Bakanlığı, (2021).
- Pinto, J., Cruz, D., Paiva, A., Pereira, S., Tavares, P., Fernandes, L., & Varum, H. (2012). Characterization of corn cob as a possible raw building material. Construction and Building Materials, 34, 28–33. https://doi.org/10.1016/j.conbuildmat.2012.02.014
- Pinto, J., Paiva, A., Varum, H., Costa, A., Cruz, D., Pereira, S., Fernandes, L., Tavares, P., & Agarwal, J. (2011). Corn’s cob as a potential ecological thermal insulation material. Energy and Buildings, 43(8), 1985–1990. https://doi.org/10.1016/j.enbuild.2011.04.004
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- Ramos, A., Briga-Sá, A., Pereira, S., Correia, M., Pinto, J., Bentes, I., & Teixeira, C. A. (2021). Thermal performance and life cycle assessment of corn cob particleboards. Journal of Building Engineering, 44(July), 102998. https://doi.org/10.1016/j.jobe.2021.102998
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- Xu, M., Huang, Q., Lu, J., & Niu, J. (2021). Green synthesis of high-performance supercapacitor electrode materials from agricultural corncob waste by mild potassium hydroxide soaking and a one-step carbonization. Industrial Crops and Products, 161(July 2020), 113215. https://doi.org/10.1016/j.indcrop.2020.113215
Abstract
In this study, the use of corn cob, which is agricultural waste, in gypsum-based composites was investigated. Corn cobs were ground in 3 different grain sizes 5.6 mm, 4 mm, and 2 mm. Corn cobs were added to gypsum mixtures at 20%, 40% and 60% by volume. 40x40x160 mm prismatic samples were produced and unit weight, ultrasonic pulse velocity, water absorption, capillary water absorption, and apparent porosity tests were applied. 200x160x20 mm sized plates were produced and the thermal conductivity coefficients of the samples were measured. To evaluate the mechanical properties of the samples, compressive and bending strength tests were applied. The unit weights of the samples containing ground corn cobs were lower than the reference sample. Ultrasonic pulse velocity values were found to be lower. The use of corn cob increased the apparent porosity values. Accordingly, a decrease was observed in the thermal conductivity coefficients, while the water absorption and capillary water absorption values increased. The bending and compressive strength values decreased. Refining the grain size of the ground corn cob increased the apparent porosity values, the unit volume weight and ultrasonic pulse velocity values decreased. Similarly, the coefficient of thermal conductivity, bending and compressive strength also decreased. Water absorption and capillary water absorption values increased. Although the mechanical properties of the gypsum-based composites weaken somewhat, the fact that light-weight products with lower thermal conductivity coefficients can be obtained, it is thought that the produced material can be considered as an insulation purpose and a partition element.
References
- Aransiola, E. F., Oyewusi, T. F., Osunbitan, J. A., & Ogunjimi, L. A. O. (2019). Effect of binder type, binder concentration and compacting pressure on some physical properties of carbonized corncob briquette. Energy Reports, 5, 909–918. https://doi.org/10.1016/j.egyr.2019.07.011
- Benaicha, M., Jalbaud, O., Hafidi Alaoui, A., & Burtschell, Y. (2015). Correlation between the mechanical behavior and the ultrasonic velocity of fiber-reinforced concrete. Construction and Building Materials, 101, 702–709. https://doi.org/10.1016/j.conbuildmat.2015.10.047
- Binici, H., Aksogan, O., & Demirhan, C. (2016). Mechanical, thermal and acoustical characterizations of an insulation composite made of bio-based materials. Sustainable Cities and Society, 20, 17–26. https://doi.org/10.1016/j.scs.2015.09.004
- Bovo, M., Giani, N., Barbaresi, A., Mazzocchetti, L., Barbaresi, L., Giorgini, L., Torreggiani, D., & Tassinari, P. (2022). Contribution to thermal and acoustic characterization of corn cob for bio-based building insulation applications. Energy and Buildings, 262, 111994. https://doi.org/10.1016/j.enbuild.2022.111994
- Faustino, J., Pereira, L., Soares, S., Cruz, D., Paiva, A., Varum, H., Ferreira, J., & Pinto, J. (2012). Impact sound insulation technique using corn cob particleboard. Construction and Building Materials, 37, 153–159. https://doi.org/10.1016/j.conbuildmat.2012.07.064
- Memon, S. A., Javed, U., & Khushnood, R. A. (2019). Eco-friendly utilization of corncob ash as partial replacement of sand in concrete. Construction and Building Materials, 195, 165–177. https://doi.org/10.1016/j.conbuildmat.2018.11.063
- Memon, S. A., & Khan, M. K. (2018). Ash blended cement composites: Eco-friendly and sustainable option for utilization of corncob ash. Journal of Cleaner Production, 175, 442–455. https://doi.org/10.1016/j.jclepro.2017.12.050
- Mısır Durum Tahmin Raporu 2021/2022, T.C. Tarım ve Orman Bakanlığı, (2021).
- Pinto, J., Cruz, D., Paiva, A., Pereira, S., Tavares, P., Fernandes, L., & Varum, H. (2012). Characterization of corn cob as a possible raw building material. Construction and Building Materials, 34, 28–33. https://doi.org/10.1016/j.conbuildmat.2012.02.014
- Pinto, J., Paiva, A., Varum, H., Costa, A., Cruz, D., Pereira, S., Fernandes, L., Tavares, P., & Agarwal, J. (2011). Corn’s cob as a potential ecological thermal insulation material. Energy and Buildings, 43(8), 1985–1990. https://doi.org/10.1016/j.enbuild.2011.04.004
- Rajwade, B., & Netam, N. (2020). Investigation of effects of corncob ash in fly ash bricks. Materials Today: Proceedings, 28, 2431–2434. https://doi.org/10.1016/j.matpr.2020.04.721
- Ramos, A., Briga-Sá, A., Pereira, S., Correia, M., Pinto, J., Bentes, I., & Teixeira, C. A. (2021). Thermal performance and life cycle assessment of corn cob particleboards. Journal of Building Engineering, 44(July), 102998. https://doi.org/10.1016/j.jobe.2021.102998
- Toprak Mahsulleri Ofisi. (2022). www.tmo.gov.tr
- Xu, M., Huang, Q., Lu, J., & Niu, J. (2021). Green synthesis of high-performance supercapacitor electrode materials from agricultural corncob waste by mild potassium hydroxide soaking and a one-step carbonization. Industrial Crops and Products, 161(July 2020), 113215. https://doi.org/10.1016/j.indcrop.2020.113215
Details
| Primary Language | Turkish |
|---|---|
| Subjects | Civil Engineering |
| Journal Section | Civil Engineering |
| Authors | |
| Publication Date | December 3, 2022 |
| Submission Date | August 2, 2022 |
| Published in Issue | Year 2022Volume: 25 Issue: 4 |
