Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2005, Vol. 16 ›› Issue (6): 376

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Natural γ-ray-emitting radionuclides in Egyptian cement


  1. 1 Physics Deptartment, Faculty of Science Qena, South Valley University, Egypt;
    2 Physics Deptartment, Faculty of Science, Assiut University, Egypt;
    3 Physics Deptartment, Faculty of Science, El-Azhar University, Egypt
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A.M.EL-ARABI, A.ABBADY, A.H. EL-KAMEL, A. NOSIER, A. MOUSTAFA. Natural γ-ray-emitting radionuclides in Egyptian cement.Nuclear Science and Techniques, 2005, 16(6): 376

Abstract: Samples of cement manufactured in Egypt and the raw materials have been analyzed using gamma- spectroscopy, in order to determine the concentration of natural radionuclides and associated radiological hazard. The mean of specific activity due to radionuclides of 226Ra, 232Th and 40K was found to be (20±4), (11± 2), (320±18) (gypsum), (41±8), (27±5), (410±27) (clay), (58±11), (18±3), (321±20) (iron ore) and (37.6±6), (11.8±3), (178.6±15) Bq•kg-1 (Portland cement), respectively. 40K concentration could not be detected in slag, limestone, sulphate resistant cement (S.R.C.), clinker and white cement, while the mean specific activities of 226Ra and 232Th are (239±16), (48.7±7); (31.5±5), (10±2); (47±7), (20±5); (23±5), (10.4±3) and (23±5), (11±3) Bq•kg-1, respectively. The activities (concentrations) are in the same range as the data released in other countries. The calculated radiation hazard parameters for all the samples are still lower than the acceptable values in Egypt and other countries.

Key words: Gamma ray, Natural radionuclides, Cement, Radiation hazard