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

Malkapur, Santhosh M.; Narasimhan, M. S.

doi:10.1016/b978-0-08-102676-2.00010-4

Cited by 3 publications

(4 citation statements)

References 33 publications

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“…On the other hand, it was observed that the epoxy dispersion (MPCC2), macrofibers (MF2), and both types of fibers added at the same time caused an increase in HVL from about 5.0% (MPCC2) to 17.0 (MF3); in other words, the thickness of the shield necessary to reduce the radiation by half increased, which means that the shielding effectiveness was weakened. This is not consistent with the results reported in the literature [17][18][19]. Because of the increase in hydrogen content, the addition of polymers to concrete should result in an increase in its effectiveness in shielding against neutron radiation.…”

Section: Neutron Radiation Shielding Effectivenesscontrasting

confidence: 89%

“…This can be done by modifying the composition of the concrete mix using materials containing hydrogen. One of the milestones in the evolution of shielding technology against neutron radiation was the concept of adding polymers into concrete composites in the form of admixtures (e.g., superplasticizers) and additives (e.g., resins and fibers) [17][18][19]. This enables w/c ratio (water-cement ratio) reduction and improvement of usability properties like tightness, mechanical properties, and chemical resistance without loss of the workability of the fresh concrete mix.…”

Section: Introductionmentioning

confidence: 99%

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Influence of Polymer Modification on the Microstructure of Shielding Concrete

2020

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In this paper an analysis of the influence of polymer modification on the microstructure, shielding properties against neutrons, and compressive strength of heavy-weight magnetite concrete is carried out. The modifications involve the addition of acrylic or epoxy dispersions as well as micro- or/and macrofibers. A computer image analysis method is used to evaluate the microstructure of concretes and parameters of pore structure are calculated; these parameters include relative volume fraction, relative specific surface area, and pore arrangement ratios, including a proprietary ratio based on Voronoi tessellation. An assessment of significance of differences between stereological parameters of reference concrete and polymer modified concretes, as well as the impact of polymer form (dispersion or fibers) on shielding properties and compressive strength is carried out using Student’s t-test. The results show that except for the effect of the addition of both polypropylene micro- and macrofibers on the relative volume of pores, all other modifications result in statistically significant changes in the values of stereological parameters. Nevertheless, it is shown that neither polymer dispersions nor fibers have a statistically significant impact on shielding properties, but that they do influence compressive strength.

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Section: Neutron Radiation Shielding Effectivenesscontrasting

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Influence of Polymer Modification on the Microstructure of Shielding Concrete

2020

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“…In the work by Malkapur et al [17] A novel polymerincorporated self-compacting concrete (PISCC) mix's features for shielding against Neutron Rays are investigated. They used three different reference volumes of Pulverized high-density polyethylene (HDPE) material, as a partial substitute for river sand in conventional concrete mixes.…”

Section: This Study Aims To Review the Efficiency Of Different Filler...mentioning

confidence: 99%

Radiation Shielding Against Neutron Using Different Fillers: Review Study

Mohamedy¹

2023

Arab Journal of Nuclear Sciences and Applications

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Radiation Shielding Concrete is mixture of cement, water, and heavy weight Aggregates (Fillers) commonly used as shielding against radiation as neutrons that emitted in different facilities as the medical units, particle accelerators. Neutrons causing extra doses to the patient and the occupational workers which is the main issue to grantee radiation safety. Various special Concretes containing fillers have been produced and used for enhancing the radiation shielding characteristics of the ordinary concrete. Only light elements as boron and hydrogen acts as moderate for neutrons that can absorb them. Therefore, for neutrons radiation shielding; concrete must contain light elements beside the heavy elements. Many softwires were employed to examine the effectiveness of the concretes as a radiation shielding materials, also Monte Carlo (MC) simulation program that simulates the transmission and interaction of radiation with different matters. Those software and simulation programs can be used in different fields such as, radiation physics, medicine, and researches. In this paper different fillers added to the ordinary concrete and different measuring methods will be reviewed.

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“…The high energy electron beam (EB) has become a powerful and important tool to modify the physico-chemical characteristics of both the categories of organic semiconductors namely molecular semiconductor and conducting polymer. The amount of radiant energy absorbed per unit mass of the material, is known as radiation dose (D), which is measured in joules per kg and its unit is gray (Gy) [1,2]. EB processing is a type of radiation treatment in which an accelerator is used to generate high energy electron beam and this EB is made to fall on the material of interest for their modifications.…”

Section: Introductionmentioning

confidence: 99%

Electron Beam Induced Tailoring of Electrical Characteristics of Organic Semiconductor Films

et al. 2020

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Tailoring the characteristics of organic semiconductors including molecular semiconductor and conducting polymers is the frontline area of research for improving the performance of organic electronic devices. Electron beam treatment has been established as one of the easiest method in comparison to others like chemical doping, thermal processing, ozonolysis, UV and other ionizing radiation treatment, to tune the physico-chemical properties of organic semiconductors. High energy electron beam (EB) generated from an accelerators impinges energy to the material and causes several phenomena including doping, crosslinking, chain degradation, gas evolution, molecular structural modifications, oxidation and unsaturation. Such modifications lead to variation in electrical characteristics and consequently affect the overall device performances. In the present review we have focused on the different interaction processes of EB with organic semiconductors and its implications to tailor the performance of device comprising of it mainly gas sensors, field effect transistors, thermoelectric power generators and radiation dosimeters.

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

Cited by 3 publications

References 33 publications

Influence of Polymer Modification on the Microstructure of Shielding Concrete

Influence of Polymer Modification on the Microstructure of Shielding Concrete

Radiation Shielding Against Neutron Using Different Fillers: Review Study

Electron Beam Induced Tailoring of Electrical Characteristics of Organic Semiconductor Films

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