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2019 | OriginalPaper | Buchkapitel

Natural Radioactivity and Hazard Level Assessment of Cements and Cement Raw Materials

verfasst von : Naim Sezgin, Bektas Karakelle, Ugur Emre Temelli, Semih Nemlioğlu

Erschienen in: Recycling and Reuse Approaches for Better Sustainability

Verlag: Springer International Publishing

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Abstract

Cement is a composite material and it consists of different raw materials. The raw materials which are used in the cement production industry are commonly obtained from rocks such as limestone, gypsum, clay, and iron ore. In addition, the cement raw materials may also include natural radionuclides such as ²²⁶Ra, ²³²Th, and ⁴⁰K, which may have an adverse effect on human health. Hence, determination of natural radioactivity level is very important for human health safety. In this study, natural activity concentrations of ²²⁶Ra, ²³²Th, and ⁴⁰K are investigated in cement and cement raw materials in Turkey as a case study. In addition, eight different radiological parameters and indices were calculated from activity concentrations. The natural radioactivity due to the presence of ²²⁶Ra, ²³²Th, and ⁴⁰K was measured using the gamma spectrometer coupled with HPGe detector. The mean measured activity concentrations of ²²⁶Ra, ²³²Th, and ⁴⁰K in the raw materials were 38.14, 92.66, and 636.63 Bq kg⁻¹, respectively, with higher activity concentrations in coal for ²²⁶Ra and trass for ²³²Th and ⁴⁰K. Mean activity concentrations of natural radionuclides (²²⁶Ra, ²³²Th, and ⁴⁰K) in cement samples were found as 34.26, 58.2, and 512, respectively. The results showed that coal and fly ash are the principal contributors for the presence of ²²⁶Ra activity concentration, trass and iron ore materials for the presence of ²³²Th, and clay and trass raw materials for the presence of ⁴⁰K in cements.

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Titel: Natural Radioactivity and Hazard Level Assessment of Cements and Cement Raw Materials
verfasst von: Naim Sezgin
Bektas Karakelle
Ugur Emre Temelli
Semih Nemlioğlu
Verlag: Springer International Publishing
Buch: Recycling and Reuse Approaches for Better Sustainability
Print ISBN: 978-3-319-95887-3

Electronic ISBN: 978-3-319-95888-0

Copyright-Jahr: 2019
DOI: https://doi.org/10.1007/978-3-319-95888-0_14