期刊
CONSTRUCTION AND BUILDING MATERIALS
卷 182, 期 -, 页码 35-42出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.conbuildmat.2018.06.032
关键词
Nuclear radiation; Concrete shield; Heavy-weight aggregate; Hematite aggregate; Barite aggregate; Layered mixture; Attenuation of radiation
The purpose of this study is to make a concrete shield for gamma rays using barite and hematite gradation in separate, mixed and multi-layered forms. Nuclear and mechanical properties of these concrete shields were measured. The results showed that increasing the barite and hematite aggregates, either in separated or mixed form, increases the linear attenuation coefficient and 28-day compressive strength. It was found that the order of the layers in multi-layered shields has no significant effect on the attenuation of gamma radiations. In equal conditions the integrated mixed concrete shield showed better effects in attenuation of radiations than layered one. (C) 2018 Elsevier Ltd. All rights reserved.
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