Improvement of concrete shielding to nuclear radiations using barite mineral as fine aggregate

  • Izaz Ahmad Master in Structural Engineering http://orcid.org/0000-0002-8322-9278
  • Khan Shahzada Phd in Structural Engineering
  • Imran Ahmad Phd in Process design and Optimization (Chemical Engineering)
  • Fayaz Khan PhD in Water Resources Enginnering
  • Yasir Irfan Badrashi Phd in Structural Engineering
  • Habib Ahmad PhD in Medical Physics
  • Sajjad Wali Khan Phd in Structural Engineering
  • Noor Muhammad PhD in Rock Mechanics
Keywords: Normal concrete, barite concrete, compressive strength, tensile strength, Elastic modulus, Radiation shielding

Abstract

This paper presents findings of research conducted on improvement of radiation shielding in concrete while optimizing the thickness of concrete shields. Radiation shielding was studied for concrete wherein fine aggregate was replaced by Barite, which is a heavy mineral, having specific gravity in range of 4.0 to 4.5. Barite mineral was obtained from Barite quarries situated in Jamrud, Federally Administered Tribal Areas (FATA), Pakistan. Influence of Barite on mechanical and radiation shielding properties of concrete was studied on concrete cylinders cast with water-to-cement ratio of 0.30 to 0.45. ASTM standard was used to compute compressive and tensile strengths of concrete. Radiation shielding potential of concrete was studied by subjecting concrete sections to Gamma-ray source (Cobalt-60). Additionally, ASTM standard was used to conduct Thermo Gravimetric analysis. The study concluded that compressive and tensile strengths decreased with addition of Barite by a maximum of 11.75% and 19.75%, respectively. Similar to ordinary concrete, reduction in mechanical properties was observed with increase in water-to-cement ratio. Results showed that shielding ability of concrete improved as a result of addition of Barite mineral in concrete as fine aggregate with 28.4% increase in linear attenuation coefficient. It is concluded that linear attenuation coefficient varies proportionally with variation in density of concrete. It is recommended that the optimum water-to-cement ratio of barite mineral infused concrete is 0.45 for the least reduction in mechanical properties with acceptable level of radiation shielding.

Author Biographies

Izaz Ahmad, Master in Structural Engineering
Lecturer Civil Engineering department, University of Engineering and Technology Peshawar Campus III Bannu
Khan Shahzada, Phd in Structural Engineering
Associate Prof. at Civil Engineering department, University of Engineering and Technology Peshawar
Imran Ahmad, Phd in Process design and Optimization (Chemical Engineering)
Assistant Prof. at Chemiacl Engineering department, University of Engineering and Technology Peshawar
Fayaz Khan, PhD in Water Resources Enginnering
Assistant Prof. at Civil Engineering department, University of Engineering and Technology Peshawar
Yasir Irfan Badrashi, Phd in Structural Engineering
Assistant Prof. at Civil Engineering department, University of Engineering and Technology Peshawar
Habib Ahmad, PhD in Medical Physics
Head Medical Physics at Institute of Radiotherapy and Nuclear Medicine, Peshawar, Pakistan
Sajjad Wali Khan, Phd in Structural Engineering
Assistant Prof. at Civil Engineering department, University of Engineering and Technology Peshawar
Noor Muhammad, PhD in Rock Mechanics
Prof. at Mining Engineering department, University of Engineering and Technology Peshawar

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Published
2019-11-20
Section
Civil Engineering (1)