건설재료로 재활용하기 위한 폐PET의 공학적 평가에 관한 연구 = Study on the Engineering Evaluation of Waste PET as a Construction Material

다국어 초록 (Multilingual Abstract)

Polyethylene terephthalate (PET) is a polyester resin produced by the condensation reaction between terephthalic acid and ethylene glycol. Since it has excellent engineering properties such as thermal stability, transparency, and strength, the consumption for packaging containers increases every year; in turn, waste PET increased. It is difficult to recycle PET due to the lack of facilities, which makes waste PET a source of environmental pollution. In this study, we analyzed the engineering properties of waste PET to explore the possibility of using it as an alternative to concrete, the latter of which produces carbon dioxide emissions and causes environmental damage by collecting natural aggregates. We found that the compressive strength of waste PET was 32.89MPa, tensile strength was 31.43 MPa, Izod impact strength was 2.68 kJ/m², and Rockwell hardness was 122.17. These results showed that the compressive strength was equivalent to that of ordinary concrete, and the tensile strength and hardness were better. However, the impact strength was low. Also, waste PET showed a lack of resistance to dynamic loads acting suddenly in various directions. However, in the static load condition such as the weight of soil, we found that the cross-section is simple such as pile foundation, culvert, block, and waste pipe, and waste PET can be used as construction materials manufactured using concrete.

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