Navrátilová Rovenská Katerina
National Radiation Protection Institute, Bartoškova 28, Prague 4 140 00, Czech Republic
Radiat Prot Dosimetry. 2014 Jul;160(1-3):92-5. doi: 10.1093/rpd/ncu096. Epub 2014 Apr 19.
Waterproofing, usually made of bitumen or polymers with various additives, is used to protect buildings mainly against dampness, but also against radon transported from the soil beneath the building. The radon diffusion coefficient is a material property which is considered to be strongly influenced by the inner structure (chemical composition, crystallinity) of a measured sample. We have used this parameter together with measurements of mechanical properties (hardness, tensile strength, elongation at break, etc.) and FTIR spectroscopy has been used in order to describe the changes in material properties induced by long-term degradation. This paper summarizes the results of radon diffusion coefficient measurements of waterproof materials exposed to radon, soil bacteria, high temperature and combinations of these factors. We have discovered changes as high as 83 % have been discovered compared to virgin samples.
防水涂层通常由沥青或添加各种添加剂的聚合物制成，主要用于保护建筑物免受潮湿影响，同时也能抵御从建筑物下方土壤中传输上来的氡气。氡扩散系数是一种材料特性，被认为会受到被测样品内部结构（化学成分、结晶度）的强烈影响。我们将此参数与机械性能（硬度、拉伸强度、断裂伸长率等）的测量结果相结合，并利用傅里叶变换红外光谱（FTIR）来描述长期降解所引起的材料性能变化。本文总结了防水材料在暴露于氡气、土壤细菌、高温以及这些因素组合作用下的氡扩散系数测量结果。我们发现，与原始样品相比，变化高达83%。
