γ射线反向散射法在混凝土构件表层质量检测中的应用  

Measurement of surface density of concrete structures by γ-ray backscattering

作　　者：郭吉堂[1] 

机构地区：[1]南京水利科学研究院

出　　处：《核技术》1989年第4期220-228,共9页Nuclear Techniques

摘　　要：本文论述了利用γ射线反向散射法测定混凝土构件表层密实性的原理、设备和试验结果。试验采用^(137)Cs辐射源,源强2.59MBq,探测设备在混凝土中的影响深度约10cm,可测精度0.1g/cm^3。对于探测深度、影响边界、工作曲线的率定和探测灵敏度等进行了讨论,并提出了利用铝作标准块的现场标定方法。The principle, instruments and test results to measure concrete surface density by V-ray backscattering are described. A radioactive source 137Cs 2.59 MBq was used, the penetration depth in concrete is about 10 cm, and the measuring precision is 0.1g/cms. The penetration area and depth in concrete, the calibration method and the measurement sensitivity are discussed. A suggestion for in-situ calibration with aluminium as standard specimen is put forward. Finally, some successful examples of in-situ practice are introduced.

关 键 词：混凝土 检测 Γ射线 反向散射 质量 

分 类 号：TU755.7[建筑科学—建筑技术科学]