Abstract
Perlite mineral contains relatively high water and in general hydrated obsidian forms the perlite which is mainly an amorphous volcanic glass. Photon attenuation properties for different concrete types including natural perlite mineral and B4C have been experimentally investigated by using different radioactive point sources at 81, 276, 303, 356, 384, 662, 1173, 1275 and 1333 keV. SEM and EDAX analyses were carried out to control the crystal structure of the selected concrete types. In this work, HPGe detector based on gamma spectrometer was employed for all experiments. The results revealed that among the prepared concrete samples, the P6 concrete sample has the lowest HVL and MFP values and thus, having best ability to attenuate gamma rays in comparison to the other prepared concretes.
Highlights
Radiation shielding concretes, known as heavyweight concretes, are the composite consist of several materials such as heavy weight aggregates, cement, water and higher than the density of concretes formed of normal aggregates [1,2]
A typical energy-dispersive X-ray (EDX) spectrum containing the predominance of multielements for the concrete type (P5) as an example is shown in Fig. 3, where all peaks identified by elements are marked
A typical microstructure of concrete types including the perlite mineral and B4C were monitored by Scanning Electron Microscope (SEM) (FEI Quanta FEG 450) images to check out the dispersion and binding of the filling materials within the synthesized concretes
Summary
Known as heavyweight concretes, are the composite consist of several materials such as heavy weight aggregates, cement, water and higher than the density of concretes formed of normal aggregates [1,2]. These composites used in building construction, in particular, have become more important with the development of nuclear technology and nuclear facilities [3] These shielding materials can be utilized in various fields such as particle accelerators, laboratory hot cells, research reactors, radiotherapy rooms, a biological shield for nuclear power plants and other different radiation sources [1,4]. It is very important to study the protection of ionizing radiation because the workers can exposure to radiations while they are in facilities with radioactive sources and radiation emitting instrument. Such buildings are important for human health as the part of their daily time is being spent in above-mentioned work areas [5]
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