Titolo:  Natural radioactivity and radon exhalation rate of Sardinian dimension stones
Data di pubblicazione:  2020
Autori: 
Autori:  Dentoni, Valentina; Da Pelo, Stefania; Mousavi Aghdam, Mirsina; Randaccio, Paolo; Loi, Alfredo; Careddu, Nicola; Bernardini, Alessandra
Numero degli autori:  7
Lingua:  Inglese
Presenza coautori internazionali:  no
Rivista:  CONSTRUCTION AND BUILDING MATERIALS
Volume:  247
Pagina iniziale:  118377
Numero di pagine:  9
Digital Object Identifier (DOI):  http://dx.doi.org/10.1016/j.conbuildmat.2020.118377
Codice identificativo Scopus:  2-s2.0-85080946141
Codice identificativo ISI:  WOS:000528271000006
Abstract:  Due to the ever-growing public concern about radon risk arising from building materials, the radon exhalation rates and the natural radioactivity of eighteen dimension stones mostly used in Sardinia and widely exported worldwide have been estimated by means of laboratory tests. Some of the quarrying companies that operate within the Sardinian territory provided the samples to be tested, which include twelve granitoids, four pyroclastic rocks and two basalts. The Activity Concentration Index (Iɤ), the External Radiation Hazard Index (Hex) and the Radium equivalent activity (Raeq) were calculated for each rock sample under investigation, based on the estimated values of 222Rn exhalation rate and 226Ra, 232Th and 40K radioactivity concentration. A poor correlation between radon release rates and 226Ra radioactivity concentrations was found. The contribution to indoor radon accumulation was also simulated for the stone with the highest 222Rn exhalation rate and the resulting concentration compared with the limit value establish by the 2013/59/Euratom Directive. These findings can be extended to rocks formed in similar geodynamic settings that are likely to produce igneous rocks with similar petrographic and geochemical features.
Parole chiave:  Sardinian dimension stones Natural radioactivity Indoor radon leve lRadon gas exposure Activity concentration index
Tipologia: 1.1 Articolo in rivista

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