Investigating the influence of gamma ray energies and steel fiber on attenuation properties of reactive powder concrete

Mohammed, Shatha D.; Majeed, Wasan Z.; Naji, Nesreen B.; Fawzi, Nada Mahdi

doi:10.1007/s41365-017-0305-9

Cited by 13 publications

(6 citation statements)

References 10 publications

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“…On the other hand, Al-Humaiqani et al [45] reported that an increase in compressive strength of high performance heavyweight concrete containing only heavyweight aggregate (barite or hematite) could be improved gamma-ray attenuation coefficients. Moreover, it seems that even if steel fiber usage can increase the mechanical properties [14] and gamma-ray attenuation coefficient of RPC [46], the adverse effect of replacing quartz by barite on the compressive strength, modulus of elasticity, flexural strength, and fracture energy could not be prevented. Thus, barite content of RPC mixture designed for radiation shielding purposes should be optimized for both gamma rays and neutrons by considering the losses in mechanical properties.…”

Section: Transmission Thicknesses Of Gamma Raysmentioning

confidence: 99%

Optimization of reactive powder concrete by means of barite aggregate for both neutrons and gamma rays

Gökçe

Yalçınkaya

Tuyan

2018

Construction and Building Materials

108

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High performance concrete has been often preferred in special engineering structures and in challenging composites products. Researchers have recently focused on the radiation shielding characteristics of these type concrete mixtures due to rising nuclear industry in the developing world. In the study, performance of reactive powder concrete was researched with regard to gamma-ray and neutron attenuation when its normal weight aggregate replaced with heavyweight aggregate (barite). For this purpose, reactive powder concrete mixtures were prepared 100% quartz aggregate, 100% barite aggregate and their blending 50-50%, by volume. Some physical and mechanical characteristics such as density, compressive strength, fracture energy, flexural strength and modulus of elasticity of the mixtures were determined. Gamma-ray attenuation coefficients and transmission thickness values were theoretically established for commonly known gamma energies (661.7, 1173.2 and 1332.5 keV). Optimization of the reactive powder mixtures was performed for both neutron and gamma-ray attenuation at 8 MeV. As a result, barite significantly increased the gamma-ray attenuation coefficients of reactive powder concrete. The mechanical performance of reactive powder concrete, however, was markedly reduced as a result of barite substitution. Replacement of quartz by barite aggregate has a more adverse impact on flexural strength than that of

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Section: Transmission Thicknesses Of Gamma Raysmentioning

confidence: 99%

Optimization of reactive powder concrete by means of barite aggregate for both neutrons and gamma rays

Gökçe

Yalçınkaya

Tuyan

2018

Construction and Building Materials

108

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“…In nuclear and environmental physics, there are a lot of researches have been reported to study the relatives between energy, attenuation properties and material thickness as in refs. [7][8][9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Impact of Glass Waste in Reactive Powder Concrete on Attenuation Properties for Bremsstrahlung Ray

Majeed,

Aboud,

Naji

et al. 2023

East Eur. J. Phys.

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Reactive Powder Concrete (RPC) is one of the most advanced recent high compressive strength concrete. This work explored the effects of using glass waste as a fractional replacement for fine aggregate in reactive powder concrete at levels of 0%, 25%, 50%, and 100%. Linear and mass attenuation coefficients have been calculated as a function of the sample's thickness and bremsstrahlung energy. These coefficients were obtained using energy selective scintillation response to bremsstrahlung having an energy ranging from (0.1-1.1) MeV. In addition, the half-value thickness of the samples prepared has been investigated. It was found that there is a reversal association between the attenuation coefficient and the energy of the bremsstrahlung ray. The results showed that, with the exception of the specimen with a partial replacement of 25% glass waste, adding fine aggregate in part by glass waste had a negative impact on the reactive powder concrete's attenuation properties. That means the sample’s density can be improved with the glass waste content ratio to 25%. Also, the bremsstrahlung radiation shielding capabilities of reactive powder concrete can be enhanced using glass waste of not more than 25%.

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“…The water adsorption on the silica has drawn great interest over the years because of its scientific and technical importance, such as the etching processes [1][2][3][4] in manipulating the electro-optical devices and display panels, sensing materials, [5][6][7] molecule sieving, [8][9][10][11] corrosion protection, [12][13][14] molecule delivery, [15][16][17] polymer composite, [18][19][20][21] and catalysis. [22][23][24] As known to all, silica contains a great deal of reactive sites to react rapidly with atmospheric water, resulting in the formation of surface silanol Si-OH groups.…”

Section: Introductionmentioning

confidence: 99%

Stable water droplets on composite structures formed by embedded water into fully hydroxylated β-cristobalite silica*

Gong¹,

Qi²,

Yang³

et al. 2021

Chinese Phys. B

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Using molecular dynamics simulations, we have revealed a novel wetting phenomenon with a droplet on composite structures formed by embedded water into (111) surface of β-cristobalite hydroxylated silica. This can be attributed to the formation of a composite structure composed of embedded water molecules and the surface hydroxyl (–OH) groups, which reduces the number of hydrogen bonds between the composite structure and the water droplet above the composite structure. Interestingly, a small uniform strain (±3%) applied to the crystal lattice of the hydroxylated silica surface can result in a notable change of the contact angles (>40°) on the surface. The finding provides new insights into the correlation between the molecular-scale interfacial water structures and the macroscopic wettability of the hydroxylated silica surface.

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Investigating the influence of gamma ray energies and steel fiber on attenuation properties of reactive powder concrete

Cited by 13 publications

References 10 publications

Optimization of reactive powder concrete by means of barite aggregate for both neutrons and gamma rays

Optimization of reactive powder concrete by means of barite aggregate for both neutrons and gamma rays

Investigation of the Impact of Glass Waste in Reactive Powder Concrete on Attenuation Properties for Bremsstrahlung Ray

Stable water droplets on composite structures formed by embedded water into fully hydroxylated β-cristobalite silica*

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