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2025 Vol.35, Issue 7 Preview Page

Research Paper

Strength Properties of Reactive Powder Concrete Mixed with Various Shapes of Gamma Irradiated Recycled Polyethylene Terephthalate

감마선을 조사한 다양한 형태의 재활용 PET 혼입 RPC의 강도 특성

Jijon Kang1
,
Seongyoung So12†
강 지존1
,
소 승영12†
1Department of Architectural Engineering, Jeonbuk National University, Jeonju 54905, Republic of Korea
2Research Center for Industrial Technology (RCIT), Jeonbuk National University, Jeonju 54920, Republic of Korea
1전북대학교 건축공학과
2전북대학교 공업기술연구센터
†Corresponding author E-Mail : archiso@jbnu.ac.kr (S. So, Jeonbuk Nat’l Univ.)
27 July 2025. pp. 296-301
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Abstract

Since the first introduction of plastics, the issue of recycling has been repeatedly discussed. Plastics with limited biodegradability accumulate in the soil and ocean when deposited in landfills, causing environmental problems, and when incinerated emit a large amount of carbon. In particular, polyethylene terephthalate (PET) is now an indispensable material in daily life, and the waste it generates is also significant. In response, we sought a way to use PET waste as a concrete additive. Typically, adding PET damages the physical strength of concrete, and to solve this problem, gamma ray irradiation was first applied to the PET. The overall peak intensity of the fourier transform infrared spectroscopy (FT-IR) absorption spectrum of gamma-ray-irradiated PET increased, and the surface hydrophilicity of the material increased. In addition, it was confirmed that surface roughness increased when PET was irradiated with gamma rays. The strength of concrete mixed with gamma-irradiated PET was measured, and the compressive strength increased compared to concrete mixed with non-gamma-irradiated PET, and in the case of fibrous PET, the flexural strength increased.

Keywords
polyethylene terephthalate
concrete
recycle
gamma ray
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Information
  • Publisher :Materials Research Society of Korea
  • Publisher(Ko) :한국재료학회
  • Journal Title :Korean Journal of Materials Research
  • Journal Title(Ko) :한국재료학회지
  • Volume : 35
  • No :7
  • Pages :296-301
  • Received Date : 2025-05-10
  • Revised Date : 2025-06-14
  • Accepted Date : 2025-06-17
  • DOI :https://doi.org/10.3740/MRSK.2025.35.7.296
Journal Informaiton Korean Journal of Materials Research Korean Journal of Materials Research
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