Investigation of irradiation effects on microstructure of cement paste using small-angle neutron scattering

Kyoungsoo Park; Chul Woo Chung; Chang Joon Lee; Tae Hyun Kwon

doi:10.1016/j.cemconres.2019.105791

Investigation of irradiation effects on microstructure of cement paste using small-angle neutron scattering

Kyoungsoo Park, Chul Woo Chung, Chang Joon Lee, Tae Hyun Kwon

Department of Civil and Environmental Engineering

Research output: Contribution to journal › Article

Abstract

Nano-structural changes of cement paste due to neutron and gamma irradiation are investigated by using small-angle neutron scattering (SANS). Disk specimens were prepared with the w/c ratios of 0.4 and 0.5, and they were exposed to the neutron fluence of 2.57 × 10¹⁴ n/cm² and the gamma radiation does dosage of 38.4 Gy. Based on SANS data and a microstructural model of C-S-H gel, one observed that the size of C-S-H globules increased after irradiation. The change of C-S-H globule size may be associated with the change of surface morphology and chemical bonding of C-S-H, and thus further research on the irradiation effects on cement paste is necessary.

Original language	English
Article number	105791
Journal	Cement and Concrete Research
Volume	123
DOIs	https://doi.org/10.1016/j.cemconres.2019.105791
Publication status	Published - 2019 Sep

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All Science Journal Classification (ASJC) codes

Building and Construction
Materials Science(all)

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Park, K., Chung, C. W., Lee, C. J., & Kwon, T. H. (2019). Investigation of irradiation effects on microstructure of cement paste using small-angle neutron scattering. Cement and Concrete Research, 123, [105791]. https://doi.org/10.1016/j.cemconres.2019.105791

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abstract = "Nano-structural changes of cement paste due to neutron and gamma irradiation are investigated by using small-angle neutron scattering (SANS). Disk specimens were prepared with the w/c ratios of 0.4 and 0.5, and they were exposed to the neutron fluence of 2.57 × 1014 n/cm2 and the gamma radiation does dosage of 38.4 Gy. Based on SANS data and a microstructural model of C-S-H gel, one observed that the size of C-S-H globules increased after irradiation. The change of C-S-H globule size may be associated with the change of surface morphology and chemical bonding of C-S-H, and thus further research on the irradiation effects on cement paste is necessary.",

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AU - Park, Kyoungsoo

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AU - Kwon, Tae Hyun

PY - 2019/9

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AB - Nano-structural changes of cement paste due to neutron and gamma irradiation are investigated by using small-angle neutron scattering (SANS). Disk specimens were prepared with the w/c ratios of 0.4 and 0.5, and they were exposed to the neutron fluence of 2.57 × 1014 n/cm2 and the gamma radiation does dosage of 38.4 Gy. Based on SANS data and a microstructural model of C-S-H gel, one observed that the size of C-S-H globules increased after irradiation. The change of C-S-H globule size may be associated with the change of surface morphology and chemical bonding of C-S-H, and thus further research on the irradiation effects on cement paste is necessary.

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10.1016/j.cemconres.2019.105791