Physical, mechanical, and radiation attenuation properties of serpentine concrete containing boric acid

Zayed, Ahmed M.; Masoud, M.A.; Shahien, Mohamed G.; Gökçe, Haşan; Sakr, K.; Kansouh, W.A.; El-Khayatt, A.M.

doi:10.1016/j.conbuildmat.2020.121641

Cited by 62 publications

(10 citation statements)

References 71 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The microscopic investigations for some of the collected representative serpentinites (Figure 2a) by a polarizing light microscope (Nikon) in both PPL and CPL (Figure 2b-d) showed that chrysotile (Ctl) is the dominant serpentine phase in Wadi Atalla serpentinites with a reasonable occurrence of dolomite (Dol) and a minor presence of magnetite (Mag) and lizardite (Lz). The predominance of Ctl, which is marked by folded and sheared fibers, over the other serpentine polymorphs (Lz) indicates a high degree of the experienced serpentinization processes [17,[27][28][29][30]. Magnetite (Mag) is also the product of hydrothermal alteration of the harzburgite.…”

Section: Characterization Of Raw Materials Characterization Of Natura...mentioning

confidence: 99%

“…and lizardite (Lz). The predominance of Ctl, which is marked by folded and sheared fi over the other serpentine polymorphs (Lz) indicates a high degree of the experience pentinization processes [17,[27][28][29][30]. Magnetite (Mag) is also the product of hydrothe alteration of the harzburgite.…”

Section: Characterization Of Raw Materials Characterization Of Natura...mentioning

confidence: 99%

See 1 more Smart Citation

From Hazardous Chrysotile and Polyamide Wastes into Sustainable Serpentine/Polyamide Nanocomposite Membrane: Fabrication, Characterization, and Environmental Application

et al. 2023

View full text Add to dashboard Cite

Sustainable serpentine/polyamide nanocomposite (SP/PAM) was fabricated using malicious mining (serpentine chrysotile, SP Ctl) and industrial (polyamide, PA6) wastes via the electro-spinning technique. Before fabrication, the fibrous nature of Ctl was demolished through intensive grinding into nano-fractions. The successful impregnation of Ctl within PA6 via the electro-spinning technique at fixed ratios of precursor raw materials in the dissolving agent (7.5/92.5% SP/PA wt/wt solid/solid) created an internal network structure within the polymer fibers by molecular self-assembly. SP/PAM showcased its prowess in tackling the remediation of diverse dyes and Fe(III) from synthetic solutions in a batch system. Based on correlation coefficient outcomes (R2 ≈ 0.999), the pseudo-second-order equation justified the sorption data in an adequate way for all contaminants. In addition, intra-particle diffusion was not the only driving factor in the sorption process. Similarly, the Langmuir equation with maximum removal capacity (qmax) 5.97, 4.33, and 5.36 mg/g for MO, MB, and Fe(Ⅲ), respectively, defined the sorption data better than Freundlich.

show abstract

Section: Characterization Of Raw Materials Characterization Of Natura...mentioning

confidence: 99%

Section: Characterization Of Raw Materials Characterization Of Natura...mentioning

confidence: 99%

From Hazardous Chrysotile and Polyamide Wastes into Sustainable Serpentine/Polyamide Nanocomposite Membrane: Fabrication, Characterization, and Environmental Application

et al. 2023

View full text Add to dashboard Cite

show abstract

“…Accordingly, concrete density can be controlled by controlling the density of aggregate as the aggregate representation reaches about 80% of the volume of RSC 24 . Zayed et al reported that the use of heavy aggregates containing heavy metals with large atomic numbers elements highly efficiently limits radiation transmission through RSC 25 . Thus, high‐density aggregates weaken the ability of gamma rays to transmit, while aggregates whose elements have a crystalline water content can weaken the transmission of neutrons through concrete 26,27 .…”

Section: Introductionmentioning

confidence: 99%

“…24 Zayed et al reported that the use of heavy aggregates containing heavy metals with large atomic numbers elements highly efficiently limits radiation transmission through RSC. 25 Thus, high-density aggregates weaken the ability of gamma rays to transmit, while aggregates whose elements have a crystalline water content can weaken the transmission of neutrons through concrete. 26,27 Accordingly, hematite aggregate and high-density SS are effective and can be used to produce shielding concrete to mitigate or prevent the transmission of gamma rays.…”

mentioning

confidence: 99%

Effects of nano titanium and nano silica on high‐strength concrete properties incorporating heavyweight aggregate

Abu el‐Hassan,

Hakeem,

Amin

et al. 2023

Structural Concrete

View full text Add to dashboard Cite

This investigation aims to study the effect of replacing 100% of fine and coarse aggregates with heavyweight aggregates and adding nano titanium (NT) and nano silica (NS) on shielding against radiation and on the mechanical and transport properties of heavyweight high‐strength concrete (HWHSC). In this study, 20 mixes were prepared that included the use of hematite and steel slag (SS) aggregate with NS or NT used as additions to mixes by the ratio 1% and 3% from cement weight. To study the effect of the total replacement of aggregates and the addition of nanomaterials (NMs) on the properties of HWHSC, to study engineering properties the slump, compressive strength, splitting tensile strength, flexural strength, and modulus of elasticity were applied. Density, chloride permeability, sorptivity coefficient, water permeability, and microstructure tests were also performed. To study the efficiency of shielding against radiation, linear attenuation coefficient, mass attenuation coefficient, mean‐free path, half‐value layer, and tenth‐value layer of different gamma‐ray sources of radiation 137Cs 662 (keV) and 60Co 1332 (keV) were applied. The results showed that the 100% SS and hematite replacement as coarse and fine aggregates with 3% (NS or NT) achieved the best mechanical and transport properties compared to other mixtures. While the highest density of the string containing hematite and SS was achieved with 3% of NT, with a density of 3384 kg/m3. The highest compressive strength of more than 116 MPa was achieved for the included mixture of 3% NS. The highest attenuation of gamma‐ray radiation was achieved with the application of hematite and SS aggregates with 3% of NT.

show abstract

“…Concrete is the most typical material used to insulate the reactors from radiation [6]. It is effective at both absorbing gamma rays and using elastic and inelastic scattering to slow down fast neutrons.…”

Section: Introductionmentioning

confidence: 99%

Impact of PbO on structural, thermal, optical and gamma ray shielding behaviour of TeO₂-CdO based glasses

Almuqrin,

Al-Ghamdi,

Aloraini

et al. 2023

Phys. Scr.

View full text Add to dashboard Cite

A study was conducted to investigate the effect of an increase in the concentration of PbO on the structural, thermal, optical, and gamma ray shielding behavior of TeO2-CdO based glasses. The glasses were found to contain TeO4 and TeO3 units, as well as CdO metal oxide clusters, as indicated by the Raman spectrum. The glasses displayed minor weight loss (approximately 3%), suggesting high resistance to thermal degradation. With an increase in the concentration of PbO, the glass transition temperature (Tg), onset temperature (To), and crystallization temperature (Tc) all decreased. Additionally, the indirect band gap energy decreased from 3.497 – 3.337 eV as the lead oxide concentration increased. Moreover, the effects of PbO concentration on the linear attenuation coefficient (LAC) were investigated. The LAC values were found to be highest at 39.5 keV and decreased with increasing energy. As the PbO concentration increased, LAC values also increase. The Zeff displayed an inverse relationship with energy, except for an abrupt increase at 121.8 keV. The half value layer was found to be positively correlated with energy and varied with changes in PbO and CdO concentrations. The glasses demonstrated effective gamma radiation shielding properties, with the HVL remaining small even at higher energies, suggesting potential applications in industries such as medical imaging where thin shielding materials are preferred.

show abstract

Physical, mechanical, and radiation attenuation properties of serpentine concrete containing boric acid

Cited by 62 publications

References 71 publications

From Hazardous Chrysotile and Polyamide Wastes into Sustainable Serpentine/Polyamide Nanocomposite Membrane: Fabrication, Characterization, and Environmental Application

From Hazardous Chrysotile and Polyamide Wastes into Sustainable Serpentine/Polyamide Nanocomposite Membrane: Fabrication, Characterization, and Environmental Application

Effects of nano titanium and nano silica on high‐strength concrete properties incorporating heavyweight aggregate

Impact of PbO on structural, thermal, optical and gamma ray shielding behaviour of TeO₂-CdO based glasses

Contact Info

Product

Resources

About

Physical, mechanical, and radiation attenuation properties of serpentine concrete containing boric acid

Cited by 62 publications

References 71 publications

From Hazardous Chrysotile and Polyamide Wastes into Sustainable Serpentine/Polyamide Nanocomposite Membrane: Fabrication, Characterization, and Environmental Application

From Hazardous Chrysotile and Polyamide Wastes into Sustainable Serpentine/Polyamide Nanocomposite Membrane: Fabrication, Characterization, and Environmental Application

Effects of nano titanium and nano silica on high‐strength concrete properties incorporating heavyweight aggregate

Impact of PbO on structural, thermal, optical and gamma ray shielding behaviour of TeO2-CdO based glasses

Contact Info

Product

Resources

About

Impact of PbO on structural, thermal, optical and gamma ray shielding behaviour of TeO₂-CdO based glasses