Abstract
Radon monitoring has become a global phenomenon due to its health hazard effects on population, as it is radioactive and can diffuse through porous building materials. Two major transport mechanisms that dictate the inflow amount of radon are advection and diffusion, the former being controlled by pressure differential across the foundation structure between the gas emanated from the contiguous soil or building materials and the ambient air, and the later is a process determined by the radon concentration gradient across the building material structure between the radon source and the surrounding air, and can be a significant contributor to indoor radon inflow. When strategies for innovative radon-mitigation-energy conservation retrofit systems for residential dwellings are to be designed, the factors affecting the two processes need to be kept in consideration. In the present study radon diffusion through soil and fly ash has been carried out using LR-115 type II solid state nuclear track detectors. The effect of compaction, which changes the porosity and permeability of the materials, on radon diffusion has also been studied.
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