Effect of particle size and composition of granit sand on the radiological behavior of mortars
| Autor: | Miguel A. F. Sanjuán, Francisca Puertas, J. A. Suárez-Navarro, Cristina Argiz, C. Gascó, M.M. Alonso, Paula María Carmona-Quiroga, Alicia Pachón |
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| Rok vydání: | 2022 |
| Předmět: |
Materials science
Aggregate (composite) 020502 materials chemistry.chemical_element Mineralogy Thorium 02 engineering and technology Uranium Industrial and Manufacturing Engineering Actinium 0205 materials engineering chemistry Mechanics of Materials Ceramics and Composites Particle Particle size Mica Mortar |
| Popis: | Although primarily deemed to be an ornamental stone, granite may also be ground into fines for use in cement mortars, where it exhibits high strength and durability. Both the 40K present in the stone and the natural decay series of its uranium, thorium and actinium components exhibit high activity concentrations. An understanding is therefore needed of the correlation among the different particle sizes in granite aggregate to assess their contribution to a mortar's activity concentration index (ACI). This study analyses the variation in ACI with particle size in three types of granite based on the chemical, mineralogical and radiological characterisation of five size fractions. The activity concentrations of the thorium and uranium natural decay series were highest in the finest fractions. A correlation was observed between thorium and the MgO and Fe2O3 normally present in mica group phyllosilicates. In two of the three granites, the mortars prepared with the smallest size particles had ACI values >1. |
| Databáze: | OpenAIRE |
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