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[目的 ]了解室内装饰用薄层建材的放射性水平 ,提供科学的选材依据。 [方法 ]根据GB 65 66— 86有关方法 ,1999年现场测量济南地区建材市场上的室内装饰用砖、石材料表面 β、γ放射性水平并进行评价。[结果 ]花岗石和瓷砖的放射性水平较高 ,并有 15 6% ( 14 /90 )的样品γ射线照射量率超过 2 5 8× 10 -3 μC/kg·h ;而大理石和仿瓷砖均接近本底水平 ;混合色花岗石的放射性水平明显高于单一色 ;瓷砖正面 β放射性明显高于背面 ,而仿瓷砖则为背面高于正面。[结论 ]应重视薄层建材的 β放射性 ,瓷砖放射性主要来自其釉面 ,石材的放射性水平因其成岩构成不同而差异显著。
[Objective] To understand the radioactive level of thin-wall building materials for interior decoration and provide scientific basis for selection. [Method] According to the method of GB 65 66-86, the β, γ radioactivity levels of brick and stone materials for interior decoration in Jinan building materials market were measured and measured in 1999. [Result] The radioactivity level of granite and tile was high, and the γ ray irradiation rate of 15 6% (14/90) samples exceeded 25 8 × 10 -3 μC / kg · h. Both marble and imitation tile Close to the background level; mixed color granite radioactive levels were significantly higher than the single color; positive beta radioactivity was significantly higher than the back of the tile, while the imitation tile was back higher than the front. [Conclusion] The β radioactivity of thin layer building materials should be paid attention to. The radioactivity of tile mainly comes from its glazed surface. The radioactivity level of stone is notable due to its diagenetic composition.