Acta Scientiarum Polonorum

Natural radiation has been accompanying humans since its inception. They are present in the air, in water,
soil or rocks, as well as in building materials that are used to erect building objects. However, a person may
be exposed to a greater or lesser extent to the surrounding radioactivity. The paper presents the results of
radioactivity testing of concrete with a different composition of the addition of exemplary siliceous fly ash
and compacted microsilica fume. It has been proven that material with increased radioactive activity can be
safely used in the production of concrete and additionally it meets the restrictive requirements of the Polish
regulation of the Council of Ministers of 2017 or Council directive 2013/59/Euratom in the field of protection
against active radiation.