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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.
Highlights We propose an investigation of irradiation effects on the nano-structural changes of C-S-H gel for the first time. Nano-structural changes of cement paste due to neutron and gamma irradiation are investigated by SANS. Based on SANS data, one observed that the size of C-S-H globules increased after irradiation. Additionally, irradiation may cause breakage of the chemical bonding, which results in complexity on surface morphology.
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.
Highlights We propose an investigation of irradiation effects on the nano-structural changes of C-S-H gel for the first time. Nano-structural changes of cement paste due to neutron and gamma irradiation are investigated by SANS. Based on SANS data, one observed that the size of C-S-H globules increased after irradiation. Additionally, irradiation may cause breakage of the chemical bonding, which results in complexity on surface morphology.
Investigation of irradiation effects on microstructure of cement paste using small-angle neutron scattering
Park, Kyoungsoo (author) / Chung, Chul-Woo (author) / Lee, Chang Joon (author) / Kwon, Tae-Hyun (author)
2019-06-14
Article (Journal)
Electronic Resource
English
Small-Angle Neutron Scattering on Hardened Cement Paste and Various Substances for Hydration
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Small-Angle Neutron Scattering on Hardened Cement Paste and Various Substances for Hydration
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Analysis of C–S–H gel and cement paste by small-angle neutron scattering
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Analysis of C–S–H gel and cement paste by small-angle neutron scattering
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