山东省掺工业废渣新型墙体材料天然放射性水平调查

SURVEY OF NATURALLY RADIOACTIVE LEVEL OF SOME NEW TYPE WALL MATERIALS

本文对山东省掺工业废渣新型墙体材料中天然放射性物质的含量及其分布特点进行了调查研究。随机采取58个厂家的7种掺工业废渣新型墙体材料样品,用HPGeγ能谱仪测量其中天然放射性核素含量,并计算其内、外照射指数。结果表明,7种新型墙体材料中天然放射性水平由高到低依次为:赤泥砖>炉渣砌块>粉煤灰砌块(砖)>煤矸石砖、板材>石膏砌块。煤矸石砖的天然放射性水平较低,与世界建材典型值相当。原材料中粉煤灰和炉渣中天然放射性水平较高,是新型墙体材料放射性的主要来源。

Naturally occurring radioactive materials （NORM） in seven new type wall materials were surveyed. The radioactivity was determind with HPGe-γ spectrometer. The red mud has the highest radioactivity concentration, followed by slag building blocks, fly-ash building blocks（bricks）, gangue bricks and light weight board materials, gypsum blocks. Fly-ash and slag contain higher NORM, which contributes the major part of the radioactivity in new wall materials.