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

Sarayut Khemngern; Doonyapong Wongsawaeng; Pitcha Jongvivatsakul; Peem Nuaklong

doi:10.4186/ej.2020.24.3.1

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

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

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

Peem Nuaklong
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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.

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