Radioactivity measurements on building materials

²²⁶Ra, ²²⁸Ra, ⁴⁰K concentration measurements in building materials: Portland cement with fly ashes, cement with bottom ash, phosphogypsum (used in divider panels), natural stone materials (e.g. tuff, porphyries, basalts, trachytes);
determination of the Activity Concentration Index (ACI) of building materials, providing a weighted cumulative value of the ⁴⁰K, ²²⁶Ra and ²³²Th activities which is adopted by the European Commission (Council Directive 2013/59/Euratom), and determination of radiometric indexes used for the international regulatory situation in different Countries (e.g. Russia, China, USA).