活性炭盒法测量建材氡析出率方法研究  

Study on measuring radon exhalation rate of building materials by activated carbon box method

作　　者：刘淑波 梅爱华 LIU Shubo;MEI Aihua(Guangzhou Testing Centre of Construction Quality and Safety Co.Ltd.,Guangzhou 510440)

机构地区：[1]广州建设工程质量安全检测中心有限公司,广州510440

出　　处：《辐射防护》2023年第S01期56-60,共5页Radiation Protection

基　　金：广州市建筑集团有限公司科技计划项目(项目号:[2021]-KJ025)。

摘　　要：采用活性炭盒法测量蒸压砌块和混凝土块的表面氡析出率,研究了采样时间和样品密封方式对测量结果的影响。实验结果表明,不同的密封材料对实验结果有一定影响,但无显著差异;混凝土块的密度大,放射性核素比活度比蒸压砌块高很多,表面氡析出率也相对较高;在实际测量中蒸压砌块的表面析出率随着采样时间的变化结果相差较大,而混凝土块的结果相对稳定。综上所述,活性炭盒法成本低、方便操作且易于大批量使用,对于工程检测具有较强的实用性。In this paper,the surface radon exhalation rate of autoclaved aerated blocks and concrete blocks was measured with activated carbon box method.The influence of sampling time and sample sealing method on the measurement results was studied.The experimental results show that different sealing materials have some influence on the experimental results,but there is no significant difference.The density of concrete blocks is high,the specific activity of radionuclides is much higher than that of autoclaved aerated blocks,and the radon excrete rate is relatively high.In practice,the results of surface precipitation of autoclaved blocks vary greatly with sampling time,while the results of concrete blocks are relatively stable.In summary,the activated carbon box method has the advantage of low cost,convenient operation and easy to use in large quantities,and has strong practicability for engineering testing.

关 键 词：氡析出率 蒸压砌块 混凝土 活性炭盒法 

分 类 号：X830[环境科学与工程—环境工程]