Relation between microstructure, technical properties and neutron radiation shielding efficiency of concrete

Załęgowski, Kamil; Piotrowski, Tomasz; Garbacz, Andrzej; Adamczewski, Grzegorz

doi:10.1016/j.conbuildmat.2019.117389

Cited by 52 publications

(23 citation statements)

References 32 publications

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“…Using the appropriate recombination techniques, the neutron radiation dose equivalent was determined, and based on the neutron radiation dose equivalent reduction curves, one HVL per concrete was calculated. The details of the experiments on shielding effectiveness and other technical characteristics of tested concretes have been presented elsewhere [24]. The investigation of the effectiveness of shielding against neutrons was measured using a Pu-Be source and a specially prepared stand that allowed placing 500 mm × 500 mm × 50 mm concrete slabs perpendicularly to the positioning mechanism of the radiation source (Figure 4).…”

Section: Methodsmentioning

confidence: 99%

“…Using the appropriate recombination techniques, the neutron radiation dose equivalent was determined, and based on the neutron radiation dose equivalent reduction curves, one HVL per concrete was calculated. The details of the experiments on shielding effectiveness and other technical characteristics of tested concretes have been presented elsewhere [24]. A compressive strength test was carried out on 10 cm × 10 cm × 10 cm cubic samples at an age of 28 days.…”

Section: Methodsmentioning

confidence: 99%

“…The images of the microstructure are commonly captured using light microscopes; however, it is also possible to use photo cameras or computer scanners [24]. The techniques listed above may be applied for evaluation of the microstructure at the micro-or macroscale, whereas the analysis of the microstructure at lower levels requires more sophisticated instruments, e.g., SEM or TEM [25].…”

Section: Image Analysismentioning

confidence: 99%

“…Hypothetical microstructure of cement composite containing aggregate grains, pores, and cracks: a) three-dimensional sample and b) two-dimensional cross-section of sample[24].…”

mentioning

confidence: 99%

“…Basic parameters describing geometrical features of two-dimensional elements of a microstructure, e.g., grains of aggregates or pores. Legend: d 2 , equivalent diameter; A, area; d min , minimal size; d max , maximal size; α min and α max , orientation ratios; p(c), Cauchy perimeter; F h and F y , Feret diameters[24].…”

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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: Methodsmentioning

confidence: 99%

“…Using the appropriate recombination techniques, the neutron radiation dose equivalent was determined, and based on the neutron radiation dose equivalent reduction curves, one HVL per concrete was calculated. The details of the experiments on shielding effectiveness and other technical characteristics of tested concretes have been presented elsewhere [24]. A compressive strength test was carried out on 10 cm × 10 cm × 10 cm cubic samples at an age of 28 days.…”

Section: Methodsmentioning

confidence: 99%

Section: Image Analysismentioning

confidence: 99%

“…Hypothetical microstructure of cement composite containing aggregate grains, pores, and cracks: a) three-dimensional sample and b) two-dimensional cross-section of sample[24].…”

mentioning

confidence: 99%

mentioning

confidence: 99%

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Influence of Polymer Modification on the Microstructure of Shielding Concrete

2020

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Progress in Ionizing Radiation Shielding Materials

Wu,

Wang

2024

Adv Eng Mater

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The continuous development of ionizing radiation in medical imaging and treatment, nuclear reactors, food irradiation, and other fields is accompanied by potential risks. It protects related equipment and personnel by adopting radiation shielding materials to reduce irradiation. Due to the advancement of science and technology, many high‐performance radiation protection materials have been reported. Ionizing radiation is a complex environment involving X‐ray imaging, radiation therapy, nuclear power operation, and space radiation. Irradiation energy, irradiation type, and the measurement of shielding material have essential effects on shielding efficiency. However, there has not been a general review of the preparations and properties of ionizing radiation shielding materials in the light of different matrixes in recent years. Herein, a comprehensive overview of recent advancements in radiation shielding materials, categorized into alloys, concretes, glasses and ceramics, and polymer composites, is presented. Furthermore, the synthesis methods employed for these materials and their respective radiation shielding properties are discussed. Finally, the current research gap and possible future scope of radiation shielding materials are proposed.

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A comprehensive review of radiation shielding concrete: Properties, design, evaluation, and applications

Barbhuiya,

Das,

Norman

et al. 2024

Structural Concrete

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This review paper provides a comprehensive analysis of radiation shielding concrete, covering its properties, design, evaluation, and applications. It begins with an introduction, stating the objective and scope. The paper explores radiation shielding basics, including ionizing radiation, shielding principles, and materials used for shielding. Concrete's properties relevant to shielding, radiation attenuation mechanisms, and factors affecting its efficiency are discussed. Different types of radiation shielding concrete are examined, along with their applications. The design and formulation of shielding concrete, including mix proportions, optimization techniques, and quality control, are presented. Evaluation methods and standards are discussed. Lastly, challenges, future directions, and emerging technologies are outlined. This review paper serves as a valuable resource for professionals involved in radiation shielding. The review on radiation shielding concrete highlighted its effectiveness in attenuating ionizing radiation, emphasizing material composition, density, and thickness as key design factors. Evaluation methods, such as gamma spectroscopy and Monte Carlo simulations, are discussed, demonstrating its versatile applications in nuclear facilities, healthcare, and space exploration.

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Relation between microstructure, technical properties and neutron radiation shielding efficiency of concrete

Cited by 52 publications

References 32 publications

Influence of Polymer Modification on the Microstructure of Shielding Concrete

Influence of Polymer Modification on the Microstructure of Shielding Concrete

Progress in Ionizing Radiation Shielding Materials

A comprehensive review of radiation shielding concrete: Properties, design, evaluation, and applications

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