Determination of Radon Exhalation Rate from Different Mixture of Concrete

Student: Odunayo Grace Micheal (Project, 2025)
Department of Physics
Federal Polytechnic, Ede, Osun State

Abstract

Radon, a radioactive gas, poses significant health risks, particularly as a leading cause of lung cancer after smoking. This study investigates the radon exhalation rate from different mixture of Concrete used in building constructions in Ogbomosho, south-western Nigeria. The research examines how various mixtures of concrete, including those with gravel and granite, influence radon emission levels. Using a well-calibrated RAD7 electronic detector, radon concentration and its associated exhalation rates were measured. The results indicated that granite-based concrete exhibits higher radon exhalation rates than gravel-based mixtures due to its naturally higher uranium content. Additionally, the study finds that increasing the concrete grade enhances radon concentration and exhalation rates, highlighting the impact of porosity and density on radon diffusion using statistical analysis to determine the significance and correlation between concrete ingredients and radon emission. These findings underscore the need for careful material selection in construction to mitigate indoor radon exposure. The study recommends improved ventilation strategies and alternative binding agents to minimize health risks associated with radon emissions in buildings.

Keywords
Radon exhalation concrete mixtures radon concentration RAD7 detector uranium content indoor air quality granite gravel building materials ventilation strategies.
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