The Effect of Various Waste Materials’ Contents on the Attenuation Level of Anti-Radiation Shielding Concrete

Materials

Ali Basheer Azeez¹  Kahtan S. Mohammed¹  Mohd Mustafa Al Bakri Abdullah¹  Kamarudin Hussin¹  Andrei Victor Sandu² 

[1] Centre of Excellence Geopolymer & Green Technology (CEGeoGTech), School of Material Engineering, Universiti Malaysia Perlis (UniMAP), P.O. Box 77, D/A PejabatPosBesar, Kangar, Perlis 01000, Malaysia; E-Mails:;Faculty of Materials Science and Engineering, Gheorghe Asachi Technical University of Iasi, Blvd. D. Mangeron 71, Iasi 700050, Romania; E-Mail:

关键词: attenuation coefficient;    radioactive;    wastes Iron particulates;    concrete;    NaI (Tl);    steel slag;    steel ball;   

DOI  :  10.3390/ma6104836

来源: mdpi

【 摘 要 】

Samples of concrete contain various waste materials, such as iron particulates, steel balls of used ball bearings and slags from steel industry were assessed for their anti-radiation attenuation coefficient properties. The attenuation measurements were performed using gamma spectrometer of NaI (Tl) detector. The utilized radiation sources comprised ¹³⁷Cs and ⁶⁰Co radioactive elements with photon energies of 0.662 MeV for ¹³⁷Cs and two energy levels of 1.17 and 1.33 MeV for the ⁶⁰Co. Likewise the mean free paths for the tested samples were obtained. The aim of this work is to investigate the effect of the waste loading rates and the particulate dispersive manner within the concrete matrix on the attenuation coefficients. The maximum linear attenuation coefficient (μ) was attained for concrete incorporates iron filling wastes of 30 wt %. They were of 1.12 ± 1.31×10⁻³ for ¹³⁷Cs and 0.92 ± 1.57 × 10⁻³ for ⁶⁰Co. Substantial improvement in attenuation performance by 20%–25% was achieved for concrete samples incorporate iron fillings as opposed to that of steel ball samples at different (5%–30%) loading rates. The steel balls and the steel slags gave much inferior values. The microstructure, concrete-metal composite density, the homogeneity and particulate dispersion were examined and evaluated using different metallographic, microscopic and measurement facilities.

【 授权许可】

CC BY   
© 2013 by the authors; licensee MDPI, Basel, Switzerland.