EXPERIMENTAL RESEARCH OF WASTE PET AND FOUNDRY SAND RECYCLING INTO BRICKS

Öz

In this study, the aim is to produce PET-sand bricks that are more durable, lighter, more economical, have less water absorption, and have less thermal conductivity compared to clay bricks by using waste polyethylene terephthalate (PET) and waste foundry sand in different proportions. During the experiment, PET is allowed to melt, and the heated FS is gradually added to the container and mixed with the PET continuously. After the bricks were produced at different ratios, they were subjected to three-point bending, impact, water absorption, and thermal conductivity tests. The three-point bending test shows that the brick with the highest percentage of PET, S1, has the highest maximum stress, which is 17.04 MPa. The impact test result shows that S1 (1:2) and S2 (1:3) are impact-resistant and good-quality bricks. In the water absorption test, the results showed that S1 (1:2) has the lowest water absorption with 0.35%. Lastly, in the thermal conductivity test, it was determined that the red brick had the lowest thermal conductivity with 0.713 W/mk. All bricks produced in different proportions weigh less than red bricks. Moreover, since the production of PET-sand bricks does not require a long-term and high-temperature ceramic kiln, as in red brick, energy savings are provided, and the production of PET-sand is more economical.

Anahtar Kelimeler

• Recycle
• PET
• brick
• foundry sand
• sustainable construction material

ATIK PET VE DÖKÜM KUMUNUN TUĞLAYA GERİ DÖNÜŞÜMÜNÜN DENEYSEL ARAŞTIRMASI

Öz

Bu çalışmada, atık polietilen tereftalat (PET) ve atık döküm kumu (FS) farklı oranlarda kullanılarak kil tuğlalara göre daha dayanıklı, daha hafif, daha ekonomik, daha az su emilimine sahip ve daha düşük ısı iletkenliğine sahip PET-kum tuğlaları üretmek amaçlanmıştır. Deney sırasında PET'in erimesine izin verilmiş ve ısıtılmış FS kaba yavaş yavaş eklenerek sürekli olarak PET ile karıştırılmıştır. Tuğlalar farklı oranlarda üretildikten sonra üç nokta eğme, darbe, su emme ve ısı iletkenliği testlerine tabi tutulmuştur. Üç nokta eğme testi, en yüksek PET yüzdesine sahip tuğla olan S1'in 17,04 MPa ile en yüksek maksimum gerilime sahip olduğunu göstermiştir. Darbe testi sonucu, S1 (1:2) ve S2 (1:3) tuğlalarının darbeye dayanıklı ve kaliteli tuğlalar olduğunu göstermiştir. Su emme testinde ise sonuçlar S1 (1:2)'in %0,35 ile en düşük su emilimine sahip olduğunu göstermiştir. Son olarak, ısı iletkenlik testinde, kırmızı tuğlanın 0,713 W/mk ile en düşük ısı iletkenliğine sahip olduğu belirlenmiştir. Farklı oranlarda üretilen tüm tuğlalar, kırmızı tuğlalardan daha hafiflerdir. Ayrıca, PET-kum tuğlalarının üretimi, kırmızı tuğlada olduğu gibi uzun süreli ve yüksek sıcaklıkta seramik fırın gerektirmediğinden enerji tasarrufu sağlanmakta ve PET-kum üretimi daha ekonomik olmaktadır.

Anahtar Kelimeler

• Geri dönüşüm
• PET
• tuğla
• döküm kumu
• sürdürülebilir inşaat malzemesi

Kaynakça

1. [1] Britannica, 2023. "polyethylene terephthalate", https://www.britannica.com/science/polyethylene terephthalate [Access date: 23 September 2023]
2. [2] Sin, L. T., Tueen, B. S., 2023. “Plastics and environmental sustainability issues”, https://doi.org/10.1016/B978 0 12 824489 0.00006 4 pp 1 43 [Access date: 20 September 2023]
3. [3] The statistics portal for market data, 2023. “Sales volume of bottled water in the United States from 2010 to 2021”, https://www.statista.com/statistics/237832/volume of bottled water in the us/ [Access date: 1 June 2023]
4. [4] Stanford University. “Frequently Asked Questions: Benefits of Recycling”, https://lbre.stanford.edu/pssistanford recycling/frequently asked questions/frequently asked questions benefits recycling#:~:text=Plastic.,cubic%20yards%20of%20landfill%20space [Access date: 25 May 2023]
5. [5] Nair, A., 2023. Bio Market Insights. “Biggest Breakthrough in Plastic Recycling”, https://worldbiomarketinsights.com/biggest breakthrough in plastic recycling/ [Access date: 10 December 2022]
6. [6] World Wildlife Fund, 2023. “Plastic in our oceans is killing marine mammals”, https://wwf.org.au/blogs/plastic in our oceans is killing marine mammals/ [Access date: 28 June 2023]
7. [7] Tittarelli, F., 2018. “Waste and Supplementary Cementitious Materials in Concrete: Waste foundry sand”, https://doi.org/10.1016/j.conbuildmat.2017.09.010 pp. 121 147 [Access date: 2 February 2023]
8. [8] Wienerberger, 2024. How are bricks made? https://www.wienerberger.co.uk/tips and advice/brickwork/how are bricks made.html [Access date: 30 April 2024)

9. [9] ArchDaily Team, 2017. Archdaily. "Housing Construction in Argentina Uses Recycled PET Bricks", https://www.archdaily.com/885340/housing construction in argentina uses recycled pet bricks [Access date: 22 November 2022]
10. [10] Material district, 2018. “Bricks Made From Recycled Pet Bottles”, https://materialdistrict.com/article/bricks recycled pet bottles/ [Access date: 18 September 2022]
11. [11] Shiell, A., 2020. “India Based Rhino Machines Introduces Brick Made From Recycled Plastic and Sand”, https://archello.com/news/india based rhino machines introduces brick made from recycled plastic and sand [Access date: 13 June 2022]
12. [12] Mukherjee, A., 2021. “Rhino Bricks, Eco friendly bricks made from recycled sand and plastic waste, Cheaper and stronger than clay bricks”, https://mad4india.com/mad for nature/rhino bricks eco friendly bricks by rhino machines/ [Access date: 13 June 2022]
13. [13] Thukral, C., 2020. “Recycled Sand and Plastic Waste are Used to Make Sustainable Brick!”, https://www.yankodesign.com/2020/06/15/recycled sand and plastic waste are used to make this sustainable brick/ (2020) [Access date: 5 September 2022]
14. [14] Mcdonald, L., 2020. “Plastic Sand Bricks Offer Affordable And Sustainable Housing In Kenya”, https://ceramics.org/ceramic tech today/ceramic video/video plastic sand bricks offer affordable and sustainable housing in kenya [Access date: 15 June 2022]
15. [15] Thoudam, K., Hossiney, N., Lakshmish Kumar, S., Alex, J., Prakasan, S., Chandra, S., Urs, Y., Arunkumar, A.S. Recycled Surgical Mask Waste as a Resource Material in Sustainable Geopolymer Bricks. Recycling. https://doi.org/10.1016/j.conbuildmat.2024.135197 (2023) [Access date: 30 April 2024]
16. [16] Material Properties, 2023. “Air Density Heat Capacity Thermal Conductivity”, https://material properties.org/air density heat capacity thermal conductivity/ [Access date: 3 April 2023]