Mechanical and Thermal Neutron Attenuation Properties of Concrete Reinforced with Low-Dose Gamma Irradiated PETE Fibers and Sodium Borate

Authors

  • Sarayut Khemngern Chulalongkorn University
  • Doonyapong Wongsawaeng Chulalongkorn University
  • Pitcha Jongvivatsakul Chulalongkorn University
  • Peem Nuaklong Chulalongkorn University

DOI:

https://doi.org/10.4186/ej.2020.24.3.1

Keywords:

gamma ray, polyethylene-terephthalate, fibers, mechanical properties, thermal neutron attenuation, sodium borate

Abstract

This research investigated the mechanical and thermal neutron attenuation properties of concrete reinforced with low-dose gamma irradiated polyethylene terephthalate (PETE) fibers. Low dose (20 – 60 kGy) gamma irradiated PETE fibers of 1.3 and 25 denier size were uniformly mixed with concrete at 0.1%, 0.2%, and 0.3% volume fraction. The results showed that the fiber reinforced concrete (FRC) having 25 denier fibers provided higher compressive strength, flexural strength, and toughness than FRC with 1.3 denier fibers. Moreover, addition of PETE fibers in the concrete enhanced thermal neutron attenuation; however, both fibers exhibited no significant difference in thermal neutron attenuation ability. In addition, this study investigated the effects of adding sodium borate, a boron-containing compound, in concrete mixed with PETE at various proportions. It was found that when sodium borate powder was added, the compressive strength of the concrete decreased, whereas the thermal neutron attenuation ability significantly increased with respect to sodium borate content.

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Author Biographies

Sarayut Khemngern

Department of Nuclear Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, 10330, Thailand

+66965703022

Doonyapong Wongsawaeng

Department of Nuclear Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, 10330, Thailand

Pitcha Jongvivatsakul

Innovative Construction Materials Research Unit, Department of Civil Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, 10330, Thailand

Peem Nuaklong

Innovative Construction Materials Research Unit, Department of Civil Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, 10330, Thailand

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Published In
Vol 24 No 3, May 31, 2020
How to Cite
[1]
S. Khemngern, D. Wongsawaeng, P. Jongvivatsakul, and P. Nuaklong, “Mechanical and Thermal Neutron Attenuation Properties of Concrete Reinforced with Low-Dose Gamma Irradiated PETE Fibers and Sodium Borate”, Eng. J., vol. 24, no. 3, pp. 1-10, May 2020.