Fresh and hardened properties of polymer incorporated self compacting concrete mixes for neutron radiation shielding

Malkapur, Santhosh M.; Divakar, L.; Narasimhan, M. S.; Karkera, Narayana B.; Goverdhan, P.; Sathian, V.; Prasad, N.K.

doi:10.1016/j.conbuildmat.2017.09.127

Cited by 17 publications

(11 citation statements)

References 19 publications

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“…For neutron radiation, radiation sources can either be a plutonium–beryllium source (Pu–Be) or a americium–beryllium source (Am–Be). Pu–Be emits energy of 3.92 and 4.43 MeV, while Am–Be emits about 4.5 MeV [ 110 , 160 ]. As neutrons have no charge, their detection is performed indirectly through nuclear reactions that produce charged particles [ 161 ].…”

Section: Radiation Shieldingmentioning

confidence: 99%

“…The total intensity of neutrons with and without RSC is used to determine the total neutron cross section or macroscopic removal cross section ∑ R (E n ) in cm −1 , which can be calculated using Equation (6) [ 110 , 160 ]

where t is the thickness of sample (cm), and I 0 and I are the total intensity of the fast neutron flux emitted without and with the sample, respectively. The total macroscopic removal cross section, ∑ R (E n ), is the probability of a fission or fast neutron having a first collision that would displace it from the group of penetrating neutrons [ 162 ].…”

Section: Radiation Shieldingmentioning

confidence: 99%

“…The highest ∑ R (E n ) value recorded by RSC with a light natural aggregate is 0.133 cm −1 , based on exposure to 0.025 MeV of energy [ 123 ]. Concrete with granite aggregate recorded a lower value of ∑ R (E n ) at 0.104 when exposed to a higher energy level of 4 MeV [ 160 ]. Another study that used a natural aggregate in the RSC recorded a lower ∑ R (E n ) value of 0.075 cm −1 at 4 MeV [ 13 ].…”

Section: Radiation Shieldingmentioning

confidence: 99%

“…This improvement in neutron shielding due to the increase in the hydrogen presence in concrete is caused by a scattering reaction, which is facilitated by the hydrogen, hence reducing the transmission value [ 13 ]. In the utilization of HDPE as a concrete additive, a concrete sample containing HDPE and a natural aggregate had a ∑ R (E n ) of 0.108–0.11 cm −1 , which is higher than that of SBR [ 160 ]. This result is due to the amount of hydrogen loading in the HDPE concrete mix being higher by 217% compared with that of the SBR concrete mix.…”

Section: Radiation Shieldingmentioning

confidence: 99%

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Recent Trends in Advanced Radiation Shielding Concrete for Construction of Facilities: Materials and Properties

et al. 2022

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Nuclear energy offers a wide range of applications, which include power generation, X-ray imaging, and non-destructive tests, in many economic sectors. However, such applications come with the risk of harmful radiation, thereby requiring shielding to prevent harmful effects on the surrounding environment and users. Concrete has long been used as part of structures in nuclear power plants, X-ray imaging rooms, and radioactive storage. The direction of recent research is headed toward concrete’s ability in attenuating harmful energy radiated from nuclear sources through various alterations to its composition. Radiation shielding concrete (RSC) is a composite-based concrete that was developed in the last few years with heavy natural aggregates such as magnetite or barites. RSC is deemed a superior alternative to many types of traditional normal concrete in terms of shielding against the harmful radiation, and being economical and moldable. Given the merits of RSCs, this article presents a comprehensive review on the subject, considering the classifications, alternative materials, design additives, and type of heavy aggregates used. This literature review also provides critical reviews on RSC performance in terms of radiation shielding characteristics, mechanical strength, and durability. In addition, this work extensively reviews the trends of development research toward a broad understanding of the application possibilities of RSC as an advanced concrete product for producing a robust and green concrete composite for the construction of radiation shielding facilities as a better solution for protection from sources of radiation. Furthermore, this critical review provides a view of the progress made on RSCs and proposes avenues for future research on this hotspot research topic.

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Section: Radiation Shieldingmentioning

confidence: 99%

Section: Radiation Shieldingmentioning

confidence: 99%

Section: Radiation Shieldingmentioning

confidence: 99%

Section: Radiation Shieldingmentioning

confidence: 99%

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Recent Trends in Advanced Radiation Shielding Concrete for Construction of Facilities: Materials and Properties

et al. 2022

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“…Development of nuclear-based technologies and usage of X-ray waves as an ionized radiation source for diverse applications—e.g., radiation therapy, medical applications, imaging, space technology, and agricultural applications—have improved the interaction of living species with these kinds of harmful electromagnetic sources [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 ]. Receiving high dosage of ionizing radiation can be lethal to living cells by deteriorating/damaging the DNA of their cells.…”

Section: Introductionmentioning

confidence: 99%

Superior X-ray Radiation Shielding Effectiveness of Biocompatible Polyaniline Reinforced with Hybrid Graphene Oxide-Iron Tungsten Nitride Flakes

et al. 2020

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X-ray radiation is a harmful carcinogenic electromagnetic source that can adversely affect the health of living species and deteriorate the DNA of cells, thus it’s vital to protect vulnerable sources from them. To address this flaw, the conductive polymeric structure of polyaniline (PANi) was reinforced with diverse filler loadings (i.e., 25 wt % and 50 wt %) of hybrid graphene oxide-iron tungsten nitride (ITN) flakes toward attenuation of X-ray beams and inhabitation of microorganisms’ growth. Primary characterizations confirmed the successful decoration of graphene oxide (GO) with interconnected and highly dense structure of iron tungsten nitride with a density of about 24.21 g·cm−3 and reinforcement of PANi with GO-ITN. Additionally, the outcome of evaluations showed the superior performance of developed shields, where a shield with 1.2 mm thickness containing 50 wt % GO-ITN showed 131.73% increase in the electrical conductivity (compared with neat PANi) along with 78.07%, 57.12%, and 44.99% decrease in the amplitude of the total irradiated X-ray waves at 30, 40, and 60 kVp tube voltages, respectively, compared with control X-ray dosage. More importantly, the developed shields not only showed non-toxic nature and improved the viability of cells, but also completely removed the selected microorganisms at a concentration of 1000 µg·mL−1.

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Virgin and waste polymer incorporated concrete mixes for enhanced neutron radiation shielding characteristics

Malkapur

Narasimhan

2019

Use of Recycled Plastics in Eco-Efficient Concrete

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Fresh and hardened properties of polymer incorporated self compacting concrete mixes for neutron radiation shielding

Cited by 17 publications

References 19 publications

Recent Trends in Advanced Radiation Shielding Concrete for Construction of Facilities: Materials and Properties

Recent Trends in Advanced Radiation Shielding Concrete for Construction of Facilities: Materials and Properties

Superior X-ray Radiation Shielding Effectiveness of Biocompatible Polyaniline Reinforced with Hybrid Graphene Oxide-Iron Tungsten Nitride Flakes

Virgin and waste polymer incorporated concrete mixes for enhanced neutron radiation shielding characteristics

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