砌筑水泥放射性核素限量测量不确定度分析  

Analysis and research on uncertainty of measurement of radionuclide limit for masonry cement

作　　者：谢正奋 Xie Zhengfen(Guangdong Meizhou Quality&Metrology Supervision And Testing Instition,Meizhou 514072,Guangdong,China)

机构地区：[1]广东省梅州市质量计量监督检测所,广东梅州514072 [2]国家水泥及制品质量监督检验中心(广东),广东梅州514072

出　　处：《水泥工程》2022年第1期14-16,48,共4页Cement Engineering

摘　　要：近几年因复合硅酸盐水泥32.5等级取消,砌筑水泥的产量在增长,但因其执行的标准对混合材的要求较为宽泛,需进行放射性核素限量检测,为提高检测准确率,对检测仪器、称量设备等引入的不确定度因素进行研究,得出内、外照射指数的测量不确定度(扩展因子k=1)分别为6.53%和6.89%,均满足GB 6566—2010中≤20%的要求。In recent years, due to the cancellation of the 32.5 grade of composite Portland cement, the output of masonry cement has increased. However, due to its implementation of standards, the requirements for mixed materials are relatively broad, and radionuclide limited detection is required. In order to improve the detection accuracy, the uncertainty factors introduced by testing instruments,weighing equipment, etc. are studied, and the measurement uncertainty of the internal and external exposure index(expansion factor k=1) is 6.53% and 6.89%, respectively, which meet the requirements ≤20% GB 6566—2010 of requirement.

关 键 词：砌筑水泥 放射性 内照射指数 外照射指数 能谱仪 不确定度 

分 类 号：TQ172.6[化学工程—水泥工业]