Effects of neutron irradiation on densities and elastic properties of aggregate-forming minerals in concrete

Zhang Weiping; Liu Hui; Zhou Yong; Liao Kaixing; Huang Ying

doi:10.1016/j.net.2023.03.021

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자료유형: 학술저널

저자정보: Zhang Weiping (Key Laboratory of Performance Evolution and Control for Engineering Structures of Ministry of Education Tongji University) Liu Hui (Key Laboratory of Performance Evolution and Control for Engineering Structures of Ministry of Education Tongji University) Zhou Yong (Key Laboratory of Performance Evolution and Control for Engineering Structures of Ministry of Education Tongji University) Liao Kaixing (Department of Structural Engineering Tongji University) Huang Ying (Department of Structural Engineering Tongji University)

저널정보: 한국원자력학회 Nuclear Engineering and Technology Nuclear Engineering and Technology 제55권 제6호

발행연도: 2023.6

수록면: 2,147 - 2,157 (11page)

DOI: 10.1016/j.net.2023.03.021

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The aggregate-forming minerals in concrete undergo volume swelling and microstructure change under neutron irradiation, leading to degradation of physical and mechanical properties of the aggregates and concrete. A comprehensive investigation of volume change and elastic property variation of major aggregate-forming minerals is still lacking, so molecular dynamics simulations have been employed in this paper to improve the understanding of the degradation mechanisms. The results demonstrated that the densities of the selected aggregate-forming minerals of similar atomic structure and chemical composition vary in a similar trend with deposited energy due to the similar amorphization mechanism. The elastic tensors of all silicate minerals are almost isotropic after saturated irradiation, while those of irradiated carbonate minerals remain anisotropic. Moreover, the elastic modulus ratio versus density ratio of irradiated minerals is roughly following the densityemodulus scaling relationship. These find ings could further provide basis for predicting the volume and elastic properties of irradiated concrete aggregates in nuclear facilities.

#Concrete #Aggregate-forming minerals #Swelling #Molecular dynamics #Radiation damage

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Zhang Weiping

소속기관 Key Laboratory of Performance Evolution and Control for Engineering Structures of Ministry of Education Tongji University