Basic principles for the development of a common standardised method for determining the radon diffusion coefficient in waterproofing materials

Paper presents the principles for unified test methods for determining the radon diffusion coefficient in waterproof materials in order to increase the accuracy, repeatability and reproducibility of the results. We consider this very important, because an assessment of the radon diffusion coefficient is required by several national technical standards when waterproofing acts as a radon-proof membrane. The requirements for key parameters for one test method performed under non-stationary conditions and for two methods performed under stationary conditions are described in this paper.

► Three unified methods for determining the radon diffusion coefficient were developed.
► The methods should be used mainly for polymer and waterproof materials.
► The key requirements for the minimum duration and level concentration were developed.
► The proposed principles were accepted in April 2011 as a draft for the ISO standard.