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 › peer-review

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

Bibliographical note

Funding Information:
This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT and Future Planning ( 2013M2B2A4041330 , 2017K1A3A1A67015884 ). The information presented in this paper is the sole opinion of the authors and does not necessarily reflect the views of the sponsoring agency.

All Science Journal Classification (ASJC) codes

Building and Construction
Materials Science(all)

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title = "Investigation of irradiation effects on microstructure of cement paste using small-angle neutron scattering",

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.",

author = "Kyoungsoo Park and Chung, {Chul Woo} and Lee, {Chang Joon} and Kwon, {Tae Hyun}",

note = "Funding Information: This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT and Future Planning ( 2013M2B2A4041330 , 2017K1A3A1A67015884 ). The information presented in this paper is the sole opinion of the authors and does not necessarily reflect the views of the sponsoring agency. ",

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language = "English",

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AU - Park, Kyoungsoo

AU - Chung, Chul Woo

AU - Lee, Chang Joon

AU - Kwon, Tae Hyun

N1 - Funding Information: This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT and Future Planning ( 2013M2B2A4041330 , 2017K1A3A1A67015884 ). The information presented in this paper is the sole opinion of the authors and does not necessarily reflect the views of the sponsoring agency.

PY - 2019/9

Y1 - 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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