Studying the effect of nano lead compounds additives on the concrete shielding properties for γ-rays

Hassan, H. E.; Badran, H. M.; Aydarous, Abdulkadir; Sharshar, T.

doi:10.1016/j.nimb.2015.07.126

Cited by 124 publications

(40 citation statements)

References 42 publications

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“…This variation of mass attenuation coefficients can be explained using the fundamental photon interaction process of photoelectric effect, Compton scattering and pair production for low-, intermediate-and high energy photons, vary with atomic number of elements of compositions. Additionally, at low photon energy, photoelectric interaction is the dominance, and is the reason for mass attenuation coefficient reduction (662 keV) while at 1173 keV and 1332 keV Compton scattering and pair production are dominant [27]. The variations of average linear and massattenuation coefficients versus photon energy (keV) are illustrated in Fig.(4).…”

Section: Fig(2):gamma Transmission Through Natural Bentonite/pva Sammentioning

confidence: 98%

Evaluation of gamma rays shielding competence for bentonite clay /PVA polymer matrix using MCNPX code

Sallam

Hager

Rammah

et al. 2020

Arab Journal of Nuclear Sciences and Applications

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This Radiation shielding capability in terms of mass and linear attenuation coefficients, half value layer, tenth value layer, and mean free path haven been evaluated for natural bentonite coated with polyvinyl alcohol polymer (PVA) using Monte Carlo simulation (MCNPX) and XCOM program. All data were determined at gamma photons energies 662, 1173 and 1332 keV emitted from point sources of 137 Cs and 60 Co, respectively, and compared with calculated experimental data. XCOM results of mass attenuation coefficients showed better agreement with experimental data in comparison with MCNPX code. The relative deviations between experimental and theoretical mass attenuation coefficients are 4.3, 2.5 and 1.25 % at 662, 1173 and 1332 (keV) while deviation between simulated and experimental mass attenuation coefficients are -3.1, -10.96 and -10.35 % at the same energies, respectively. The relative deviation between simulated shielding factors HVL, TVL and MFPwith experimental data exhibit the same behavior as mass attenuation coefficient and having average relative deviations percentage equal to 2.5, 13.4 and 13.8 % at the studied energies, respectively.

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Section: Fig(2):gamma Transmission Through Natural Bentonite/pva Sammentioning

confidence: 98%

Evaluation of gamma rays shielding competence for bentonite clay /PVA polymer matrix using MCNPX code

Sallam

Hager

Rammah

et al. 2020

Arab Journal of Nuclear Sciences and Applications

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“…2, the val ues of the lin ear at ten u a tion co ef fi cients for nanocomposites are all higher than those of mi cro com pos ites for the same wt.% at all the in ves ti gated g-ray en er gies. As the parti cle size of the filler de creases to nanoscale, the par ticles will be homogenously dis persed over a la ger surface area within the poly meric ma trix, lead ing to an in crease of the prob a bil ity of in ter ac tion of in ci dent pho tons with nanoparticles in nano com pos ites compared with mi cro com pos ites [24]. There fore, the photon will un dergo sev eral scat ter ing pro cesses till its energy be comes less than 200 keV, then it will be ab sorbed through pho to elec tric ef fect.…”

Section: Ta Ble 1 the Vari A Tion Of The Mea Sured Val Ues Of M M mentioning

confidence: 99%

A comparative study between nano-cadmium oxide and lead oxide reinforced in high density polyethylene as gamma rays shielding composites

Alharshan

Aloraini

Elzaher

et al. 2020

Nucl Technol Radiat Prot

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In this work, polymer composites of high density polyethylene reinforced by micro-sized and nanosized cadmium oxide, lead oxide, and a mixture of both with filler weight fraction of 30% were prepared by compression molding technique and characterized by scanning electron microscope. This investigation aims to present a comparative study between cadmium oxide and lead oxide according to their sizes as fillers in high density polyethylene polymeric matrix for gamma-radiation shielding applications. The mass and linear attenuation coefficients of the investigated composites were measured as a function of g-ray energies ranging from 59.53 keV to 1408.01 keV using standard radioactive point sources (241Am, 133Ba, 137Cs, 60Co, and 152Eu). The measurements were made with a narrow beam geometry setup using a well calibrated hyper pure germanium cylindrical detector. The theoretical values of the mass attenuation coefficients were evaluated using the XCOM program database. The experimental results demonstrated that, according to the filler size, cadmium oxide composite is better as a gamma absorber in the energy region less than 81 keV, while lead oxide composite is better in the energy region greater than 81 keV. Moreover, for the same chemical structure and weight fraction of the composite, nano fillers show better attenuation performance than micro fillers in high density polyethylene based radiation shielding material.

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“…In this context, interest has grown in the various nanomaterials. The nanomaterials most often used for the modification of the cement composites are SiO 2 [112], Fe 3 O 4 [113], and PbO 2 [114]. A resistance to high temperature is required for structural concretes exploited in nuclear power plants as well as in other objects possibly exposed to the radiation.…”

Section: Properties Of Cement Composites Containing Nano-fe3o4mentioning

confidence: 99%

Properties of Cement-Based Composites Modified with Magnetite Nanoparticles: A Review

Horszczaruk¹

2019

Materials

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Despite the many available studies on the evaluation of the influence of nanomaterials on the properties of cement-based composites, the effects of some nanoparticles have not yet been fully recognized. Among the unrecognized nanomaterials are magnetite nanoparticles (MN). The literature devoted to this subject is limited. This paper reviews state-of-the-art research carried out on the effect of MN on the properties of cement-based composites. Detailed descriptions of the processing, microstructures (hydration products), properties (hydration, workability, mechanical and functional properties, and durability), and probability applications of MN-engineered cementitious composites are presented. Particular attention has been paid to MN application methods to the cement composite. Finally, the risks, challenges, and future development of MN-modified cement-based composites is discussed.

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Studying the effect of nano lead compounds additives on the concrete shielding properties for γ-rays

Cited by 124 publications

References 42 publications

Evaluation of gamma rays shielding competence for bentonite clay /PVA polymer matrix using MCNPX code

Evaluation of gamma rays shielding competence for bentonite clay /PVA polymer matrix using MCNPX code

A comparative study between nano-cadmium oxide and lead oxide reinforced in high density polyethylene as gamma rays shielding composites

Properties of Cement-Based Composites Modified with Magnetite Nanoparticles: A Review

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