Determination of Radiation Attenuation Coefficients of Concretes in Different Densities

Abstract

The density of the concrete is important parameter for dierent properties. Using dierent types and rates of aggregates cause dierent densities of the concretes. Radiation shielding properties can be varied with the density and it is important to obtain optimum density for this purpose. In this study radiation attenuation coecients were measured by comparison of ve dierent densities of concrete that called lightweight, semi-lightweight, ordinary and semi-heavyweight and heavyweight. For this purpose concretes were produced with suitable aggregate in laboratory conditions and determined some physical and mechanical properties. The total linear attenuation coecient measurements have been obtained by a collimated beam of gamma ray from sources 60 Co.

Determination of the Tenth and Half Value Layer Thickness of Concretes with Different Densities

“…This level is generally 0.02 mSv per week for a public or uncontrolled area [10]. The HVL and TVL are defined as the thickness of a shield or an absorber that reduces the radiation level by a factor of one-half and one tenth of the initial level respectively and they can be defined in terms of the effectiveness of γ-ray shielding [11,6]. The amount of radiation that penetrates through a specific thickness of material is determined by the energy of the individual photons and the characteristics (density and atomic number) of the material.…”

“…The measurements have been performed at photon energy of 1173 and 1332 keV, produced by Cobalt-60 radioactive source [6,7].…”

“…For this purpose concretes with densities in five different ranges were selected, densities between 600-1500 kg/m 3 , called lightweight concrete (LC), 1400-2000 kg/m 3 , called semi lightweight concrete (SLC), 2000-2500 kg/m 3 , called ordinary concrete (OC), 2500-3000 kg/m 3 semi heavyweight concrete (SHC), 3000-4000 kg/m 3 called heavyweight concrete (HC), respectively. For evaluated TVL and HVL thicknesses, the linear attenuation coefficients µ, were determined from measurements, using a collimated beam of gamma rays from a Cobalt-60 source [6,7].…”

Investigation of Radiation Shielding Properties of Polypropylene Fiber Reinforced Shotcrete

“…where: N intensity of radiation transmitted through material of thickness x, N 0 is the incoming radiation intensity and µ is linear attenuation coefficient [7].…”

Shielding Behaviors and Analysis of Mechanical Treatment of Cements Containing Nanosized Powders

“…These can be found in Refs. [1][2][3][4][5][6][7][8][9][10][11]. In this study, we aimed to investigate both mechanical treatment and radiation shielding property of nanosized powders added cementitious materials.…”