Cement is the most used material in bulding activities in Côte d'Ivoire. Thus, most of the radiation exposure from the building materials is due to the cement. This work is part of radiation protection logic and therefore to assess the level of exposure due to the cement used in Côte d'Ivoire. In this study, samples of grey and white cement whose are sold on Ivorian territory were examined. To carry out this study, we analyzed these samples using a gamma spectrometer. This consisted mainly of a scintillation detector NaI (Tl) and an acquisition system both designed by the German group-LD Didactic. The specific activity of radionuclides that are 226Ra, 232Th and 40K were evaluated. The average values obtained are 29.66 Bq / kg for 226 Ra; 34.88 Bq / kg for the 232Th; 178.424 Bq / kg for 40K. These are all lower than the limit values recommended by UNSCEAR. In order to assess the radiological impact of these activities, we estimated the external and internal exposure risk indices and the annual gonadals equivalent dose. The values obtained for these parameters are well below those recommended by UNSCEAR for internal and external exposure indices, and below the world average (except for CG3 sample) for the annual gonadals equivalent dose. These results suggest that the risk to the use of these different cement brands is low.

Radioactivity is a natural phenomenon present in the universe. So, because of human life solidarity with a habitat, we are permanently in contact, especially through building materials. The objective of this work is the determination of the used cement radioactivity level in the buildings in Côte d'Ivoire. Thus, samples of grey and white cement currently used on Ivorian territory were taken. In order to determine the radioactivity level of this cement, samples were analyzed by using gamma spectrometry chain which contains a NaI (Tl) scintillation detector designed by the German manufacturer LD-DIDACTIC, coupled to a multichannel analyzer (AMC) using a Cassy Lab software. Thus, the specific activity of the primordial radionuclides 226 Ra, 232 Th and 40 K, was able to be determined. The average values obtained are 29.66 Bq/kg, 34.88 Bq/kg and 178.424 Bq/kg respectively for 226 Ra, 232 Th and 40 K. All average values are below the limit values recommended by UNSCEAR. However, we evaluated the radiological parameters such as the equivalent radium activity and the annual effective dose in order to translate the specific activity in terms of harmfulness. Values obtained for these parameters are below those recommended by ICRP and UNSCEAR. These results show that the risk incurred by the use of these different brands of cement is low.