Radioactive Contents in Construction Materials Used in Jordanian Buildings

Mohammad I. Awadallah, Mousa M. Imran

Abstract


Radionuclides in construction materials of different types and origins used for building in Jordan were investigated by gamma spectroscopy. The activity concentrations of 40K, 238U and 232Th were measured in marble, limestone, granite, fine lime, ceramic, bricks, and concrete using High Purity Ge (HPGe) spectrometer. Results indicate that granite has the maximum average activity concentrations of 39.3±2.2 Bq/kg, 53.64±3.22Bq/kg and 786±33.03Bq/kg for 238U, 232Th and 40K, respectively, exceeding the typical world averages for 232Th and 40K which have the values of 50Bq/kg and 500Bq/kg, respectively. Self absorption correction was made through the calculation of the attenuation coefficients at different gamma energies. These results are in an increase in the activities of all materials. Radium equivalent Raeq activities and hazard indices, Hex and Hin, were also calculated to assess the radiation hazards of the above mentioned materials. It has been found that all materials have Raeq well below the world average limit which is measured to be 370Bq/kg.

Keywords


Gamma Spectroscopy, Building Materials, Radiation Contents, Attenuation Coefficients, Radium Equivalent Activity, Radiation Hazards.

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