摘要
对深圳市常用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研。从深圳在建的130个民用建筑中选取了12种墙体材料,用低本底多道γ能谱仪测量其天然放射性核素含量。结果表明:12种常用墙体材料的460个样品的内照射指数没有超过GB 6566—2010规定的限值,外照射指数超过GB 6566—2010规定限值的有石子、蒸压灰砂砖、混凝土普通砖、粉煤灰、蒸压加气混凝土砌块,其中石子的外照射指数Iγ超标率最高,蒸压加气混凝土砌块超标率最低。通过对深圳常用墙体材料辐射水平的分析,为民用建筑建造过程中材料的抽检及选择建筑材料提供参考。
The contents and distribution characteristics of natural radionuclides in common wall materials of Shenzhen civil buildings were investigated. Twelve kinds of wall materials were selected from 130 civil buildings in Shenzhen,which were used in the construction. The radioactivity was determined with low background multi-channel γ-ray spectrometer. The results showed that the internal exposure index of 12 kinds of wall materials of 460 samples did not exceed the limits specified in the national stan- dard GB 6566--2010. The materials which its external exposure index exceeded the limits specified in the national standard GB 6566--2010 were stone,autoclaved lime sand brick,concrete common brick,fly ash and autoclaved aerated concrete block. The ex- cessive rate of external exposure index of stone was the highest, and the excessive rate of external exposure index of autoclaved aerated concrete block was the lowest. The data on the radiation level of wall materials in Shenzhen was a reference for the con- struction of civil buildings in the process of sampling and construction materials selection.
出处
《新型建筑材料》
北大核心
2016年第3期70-72,共3页
New Building Materials
基金
国家自然科学基金项目(11375164)
