Evaluation of the effects of bismuth oxide (Bi2O3) micro and nanoparticles on the mechanical, microstructural and γ-ray/neutron shielding properties of Portland cement pastes

Sikora, Paweł; El-Khayatt, A.M.; Saudi, H. A.; Chung, Sang-Yeop; Stephan, Dietmar; Elrahman, Mohamed Abd

doi:10.1016/j.conbuildmat.2021.122758

Cited by 35 publications

(23 citation statements)

References 59 publications

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“…To produce lead-free radiation shielding cement composites, various high-Z NPs are used. These include Bi 2 O 3 , TiO 2 , Fe 2 O 3 , and Fe 3 O 4 (Abo-El-Enein et al 2018;Dezhampanah et al 2021;Sikora et al 2021b). To date, Fe 3 O 4 (nanomagnetite) has been found to be the most versatile in concrete applications (Horszczaruk 2019;Mansouri et al 2019).…”

Section: Introductionmentioning

confidence: 99%

Rheological, Mechanical, Microstructural and Radiation Shielding Properties of Cement Pastes Containing Magnetite (Fe3O4) Nanoparticles

Sikora

El-Khayatt

Saudi

et al. 2023

Int J Concr Struct Mater

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This work examines the influence of iron oxide nanoparticles (Fe3O4 NPs) on neutron and gamma-ray radiation shielding characteristics of Portland cement paste. Experimental evaluations were supplemented with theoretical studies using NXCom program. Portland cement pastes with 5, 10, 15, 20, and 30 wt% of nanomagnetite cement replacement were produced. Moreover, rheological, early strength development, compressive strength, and mercury intrusion porosimetry (MIP) tests were performed. The results showed that increasing the amount of Fe3O4 NPs in a mix leads to a gradual increment in measured viscosity and yield stress. High nano-Fe3O4 content substantially impeded the early strength development process and led to a decrement in the 7- and 28-day compressive strength of cement paste. The MIP studies exhibited a gradual increment in total porosity, and average pore volume, as nano-Fe3O4 content was increased. All the macroscopic cross-sections of slow, fast and thermal neutrons constantly increased as a result of the addition of magnetite nanoparticles, with their variations being markedly linear. Similarly, gamma attenuation test results indicated that the addition of Fe3O4 powder enhances the shielding capability of paste in the energy range of interest (0.08–2.614 MeV). In conclusion, Fe3O4 nanoparticles can be successfully used in producing lead-free cementitious composites with improved gamma-ray and neutron shielding properties. However, certain drawbacks related to an increment in matrix porosity and thus a decrement in mechanical performance should be taken into account.

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Section: Introductionmentioning

confidence: 99%

Rheological, Mechanical, Microstructural and Radiation Shielding Properties of Cement Pastes Containing Magnetite (Fe3O4) Nanoparticles

Sikora

El-Khayatt

Saudi

et al. 2023

Int J Concr Struct Mater

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“…In 2021, the Pawel Sikora 22 team prepared cement pastes with various ratios of cement (up to 30 wt%) replaced with Bi 2 O 3 micro and nanoparticles in, the effects of micro-Bi 2 O 3 and nano-Bi 2 O 3 powders on the mechanical properties, microstructure and γ/neutron shielding properties of silicate cement paste were compared. Gamma attenuation tests results indicate that the addition of Bi 2 O 3 powders enhances the shielding capability of pastes, in the energy range of interest (0.08–2.614 MeV).…”

Section: Introductionmentioning

confidence: 99%

“…The γ-ray attenuation experiments showed that MACs of the composites at various γ-ray energies increased with filler loading. These composites are effective in shielding γ-rays from radioactive sources like 137 Cs, 22 Na, 133 Ba, and 60 Co that are widely employed in several medical and industrial applications.…”

Section: Introductionmentioning

confidence: 99%

Properties of Bi₂O₃/epoxy resin–coated composites for protection against gamma rays

Peng

Zhao

et al. 2022

Journal of Industrial Textiles

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In this paper, bismuth oxide (Bi2O3) as the main functional powder, lead (Pb) and tantalum (Ta) as the metal additives, epoxy resin as the matrix and polyester–cotton blended woven fabric as the substrate, Bi2O3 coating nuclear radiation protection composite, Bi2O3/Pb coating nuclear radiation protection composite, and Bi2O3/Ta coating nuclear radiation protection composite with different process parameters were prepared. The cross-section scanning analysis and the influence factor analysis of γ-ray protection performance were carried out, and the mechanical properties of the composites were discussed. The results show that an increase in Bi2O3 content (mass fraction) and an increase in coating thickness can improve the shielding rate of the composite materials to γ-rays. When the thickness of the coating is 1.6 mm and the content of Bi2O3 is 50%, the shielding rate of the composite to γ-rays (at 59.5 keV) reaches 46.1%. The shielding rate of the composite can be increased by adding appropriate metal additives, and the effect of adding Ta is better than that of Pb. The shielding rate of the composite to γ-rays (59.5 keV) can be increased from 28.4% to 31.5% by adding 5% Ta. An increase in Bi2O3 content (mass fraction) and an increase in the coating thickness can aggravate the agglomeration of functional particles in the material. The addition of metal additives can reduce agglomeration to a certain extent. Bi2O3 content, coating thickness, and metal additives all have an effect on the mechanical properties of the composite. If the coating is too thick or the functional particle content is too high, the tensile strength and elongation at break of the composite will be reduced.

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“…Demir et al [13] investigated the role of high temperatures on the radiation attenuation parameters for polypropylene fiber-reinforced heavyweight concrete. Sikora et al [14] evaluated the effect of Bi 2 O 3 in both sizes (micro-and nano-size) on the radiation shielding performance of Portland cement pastes. The authors concluded that the addition of micro-and nano-Bi 2 O 3 is an alternative method to produce lead-free radiation shielding materials.…”

Section: Introductionmentioning

confidence: 99%

“…By introducing nanoparticles into the composition of concretes, the radiation shielding properties of concrete can be enhanced, as well as its structural and mechanical properties. Nanoparticles improve these characteristics by improving the bulk properties or packing model structure of the concrete samples [14,15]. These particles can act as fillers that make the concrete more compact and increase their density.…”

Section: Introductionmentioning

confidence: 99%

Understanding the Effect of Introducing Micro- and Nanoparticle Bismuth Oxide (Bi2O3) on the Gamma Ray Shielding Performance of Novel Concrete

et al. 2021

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The aim of this study is to investigate the radiation shielding properties of novel concrete samples with bulk Bi2O3 and Bi2O3 nanoparticles (Bi2O3 NP) incorporated into its composition. The mass attenuation coefficient of the concrete samples without Bi2O3 and with 5 and 7 wt% bulk Bi2O3 were experimentally determined and were compared against values obtained using the XCOM and Geant4 simulations. Both methods greatly agree with the experimental values. The linear attenuation coefficients (LAC) of blank concrete (C-0), concrete with 5% bulk Bi2O3 (C-B5), and concrete with 5% nanoparticle Bi2O3 (C-N5) were determined and compared at a wide energy range. We found that the LAC follows the trend of C-0 < C-B5 < C-N5 at all the tested energies. Since both C-B5 and C-N5 have a greater LAC than C-0, these results indicate that the addition of Bi2O3 improves the shielding ability of the concretes. In addition, we investigated the influence of nanoparticle Bi2O3 on the LAC of the concretes. The half-value layer (HVL) for the concretes with bulk Bi2O3 and Bi2O3 nanoparticles is also investigated. At all energies, the C-0 has the greatest HVL, while C-N15 has the least. Thus, C-N15 concrete is the most space efficient, while C-0 is the least space efficient. The radiation protection efficiency (RPE) of the prepared concretes was found to decrease with increasing energy for all five samples. For C-0, the RPE decreased from 63.3% at 0.060 MeV to 13.48% at 1.408 MeV, while for C-N15, the RPE decreased from 87.9 to 15.09% for the same respective energies. Additionally, C-N5 had a greater RPE than C-B5, this result demonstrates that Bi2O3 NP are more efficient at shielding radiation than bulk Bi2O3.

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Evaluation of the effects of bismuth oxide (Bi2O3) micro and nanoparticles on the mechanical, microstructural and γ-ray/neutron shielding properties of Portland cement pastes

Abstract: Evaluation of the effects of bismuth oxide (Bi2O3) micro and nanoparticles on the mechanical, microstructural and -ray / neutron shielding properties of Portland cement pastes. Construction and Building Materials,

Cited by 35 publications

References 59 publications

Rheological, Mechanical, Microstructural and Radiation Shielding Properties of Cement Pastes Containing Magnetite (Fe3O4) Nanoparticles

Rheological, Mechanical, Microstructural and Radiation Shielding Properties of Cement Pastes Containing Magnetite (Fe3O4) Nanoparticles

Properties of Bi₂O₃/epoxy resin–coated composites for protection against gamma rays

Understanding the Effect of Introducing Micro- and Nanoparticle Bismuth Oxide (Bi2O3) on the Gamma Ray Shielding Performance of Novel Concrete

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Evaluation of the effects of bismuth oxide (Bi2O3) micro and nanoparticles on the mechanical, microstructural and γ-ray/neutron shielding properties of Portland cement pastes

Abstract: Evaluation of the effects of bismuth oxide (Bi2O3) micro and nanoparticles on the mechanical, microstructural and -ray / neutron shielding properties of Portland cement pastes. Construction and Building Materials,

Cited by 35 publications

References 59 publications

Rheological, Mechanical, Microstructural and Radiation Shielding Properties of Cement Pastes Containing Magnetite (Fe3O4) Nanoparticles

Rheological, Mechanical, Microstructural and Radiation Shielding Properties of Cement Pastes Containing Magnetite (Fe3O4) Nanoparticles

Properties of Bi2O3/epoxy resin–coated composites for protection against gamma rays

Understanding the Effect of Introducing Micro- and Nanoparticle Bismuth Oxide (Bi2O3) on the Gamma Ray Shielding Performance of Novel Concrete

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Product

Resources

About

Properties of Bi₂O₃/epoxy resin–coated composites for protection against gamma rays