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 45 publications

(9 citation statements)

References 71 publications

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“…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%

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

et al. 2023

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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.

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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

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“…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.…”

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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

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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.

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“…Recently, there has been a global trend towards the valorization of unexploited materials and waste as a means to address the issue of environmental pollution. 7,22,[26][27][28][29][30][31][32] One such approach is the valorization of some agricultural wastes such as sugar beet to produce AC. 33,34 Sugar beet is one of the most important sugar-producing plants worldwide, as the root contains a lot of sucrose.…”

Section: Introductionmentioning

confidence: 99%

Efficient dye removal from industrial wastewater using sustainable activated carbon and its polyamide nanocomposite derived from agricultural and industrial wastes in column systems

Zayed,

Metwally,

Masoud

et al. 2023

RSC Adv.

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

Cited by 45 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

Efficient dye removal from industrial wastewater using sustainable activated carbon and its polyamide nanocomposite derived from agricultural and industrial wastes in column systems

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