Testing permeability of building materials for radon diffusion

摘要

The diffusion coefficient and length for some building construction materials like limestone powder, sandstone, granite, crasher, soil, sand, cement, fly ash, gypsum, wall putty have been calculated. The diffusion of radon gas through these materials has been carried out under a control study. Uranium ore has been used as radon source and LR-115 solid-state nuclear track detectors are used to record alpha tracks due to diffusion of radon at different heights from the source. The results indicate that the diffusion coefficient and length of radon gas in building materials are the measure of its permeability through that medium.