Experimental Investigation of Clay Fly Ash Bricks for Gamma-Ray Shielding

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• 作者：Harjinder Singh Mann^a ; ^{maurharjinder@gmail.com" class="auth_mail" title="E-mail the corresponding author} ; Gurdarshan Singh Brar^b ; Kulwinder Singh Mann^c ; ^d ; Gurmel Singh Mudahar^a
• 关键词：Absorption Efficiency ; Clay Fly Ash Bricks ; Half Value Layer ; Mass Attenuation Coefficients
• 刊名：Nuclear Engineering and Technology
• 出版年：2016
• 出版时间：October 2016
• 年：2016
• 卷：48
• 期：5
• 页码：1230-1236
• 全文大小：643 K

文摘

This study aims to determine the effect of fly ash with a high replacing ratio of clay on the radiation shielding properties of bricks. Some interaction parameters (mass attenuation coefficients, half value layer, effective atomic number, effective electron density, and absorption efficiency) of clay fly ash bricks were measured with a NaI(Tl) detector at 661.6 keV, 1,173.2 keV, and 1,332.5 keV. For the investigation of their shielding behavior, fly ash bricks were molded using an admixture to clay. A narrow beam transmission geometry condition was used for the measurements. The measured values of these parameters were found in good agreement with the theoretical calculations. The elemental compositions of the clay fly ash bricks were analyzed by using an energy dispersive X-ray fluorescence spectrometer. At selected energies the values of the effective atomic numbers and effective electron densities showed a very modest variation with the composition of the fly ash. This seems to be due to the similarity of their elemental compositions. The obtained results were also compared with concrete, in order to study the effect of fly ash content on the radiation shielding properties of clay fly ash bricks. The clay fly ash bricks showed good shielding properties for moderate energy gamma rays. Therefore, these bricks are feasible and eco-friendly compared with traditional clay bricks used for construction.