Shielding concrete with neutron attenuating and absorbing components

Piotrowski, Tomasz

doi:10.1016/b978-0-12-819459-1.00007-6

Cited by 7 publications

(3 citation statements)

References 55 publications

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“…Heavy elements in concrete are required to slow down the fast neutron, and hydrogen ion is necessary to absorb a neutron. Gradual heating from the shielding influences the neutron attenuation properties of concrete [34].…”

Section: Radiation Shieldingmentioning

confidence: 99%

Application of the Heavy-Weight Concrete as a Fire-Resistance Nuclear Concrete

Ismail Ahmed Ali,

Lublóy

2024

Nuclear Power Plants - New Insights

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The application of ionising radiations became necessary and valuable for various reasons, i.e., electricity generation, medical treatment, agriculture, industry and scientific research. Nuclear power plants are one of the most complex radiation-shielding structures. Special design and building materials are required to enhance safety and reduce the risk of harmful radiation emissions. The construction of nuclear buildings must fulfil radiation attenuation, strength, fire resistance and durability which are cost-effective properties. Therefore, heavy-weight concrete (HWC) can fulfil these requirements due to its cost-effectiveness and good physical, mechanical and thermal properties. The research aims to introduce nuclear buildings, their application and their behaviour under elevated temperatures. Also, the research aims to review the heavy-weight concrete and heavy aggregate and their essential role in developing neutron-shielding and fire-resistant materials and prove this fact through investigations. However, the aim of this research was to investigate heavy-weight concrete’s physical, mechanical and thermal properties at different elevated temperatures. Whereas magnetite heavy-weight concrete is the main concern. Result showed the good thermal resistance capability of magnetite concrete up to 800°C, compared to the basalt and quartz concrete. Raising the water-cement ratio (w/c ratio) of the heavy-weight magnetite concrete reduced the risk of explosive spalling at 800°C. Whereas adding metakaolin and boron carbide improved the mechanical properties of magnetite concrete up to 500°C.

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Section: Radiation Shieldingmentioning

confidence: 99%

Application of the Heavy-Weight Concrete as a Fire-Resistance Nuclear Concrete

Ismail Ahmed Ali,

Lublóy

2024

Nuclear Power Plants - New Insights

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“…It was argued that aggregates containing a high atomic number such as ilmenite, hematite, barite, limonite, lime, magnetite, galena, lead, and steel slag are suitable as anti-radiation materials against gamma rays [ 25 ]. Other studies showed that concrete penetration by neutrons can be reduced by using elements that contain a low atomic number and high bound water and boron in their structure [ 26 , 27 ].…”

Section: Introductionmentioning

confidence: 99%

“…The diluted BS, which is lighter in color, gamma rays [25]. Other studies showed that concrete penetration by neutrons can be reduced by using elements that contain a low atomic number and high bound water and boron in their structure [26,27].…”

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confidence: 99%

Producing Heavyweight High-Performance Concrete by Using Black Sand as Newly Shielding Construction Material

et al. 2021

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Experimental work was carried out to study new fine aggregate shielding construction materials, namely black sand (BS). The BS effect on the mechanical, durability, and shielding characteristics of heavyweight high-performance concrete (HWHPC) was evaluated. This study aimed at improving various HWHPC properties, concertedly. Fifteen mixtures of HWHPC were made, with various variables, including replacing 10% and 15% of the cement with fly ash (FA) and replacing normal sand by BS at various contents (15%, 30%, 45%, 60%, 75%, and 100%). The test specimens were subjected to various exposure conditions, including elevated temperatures, which ranged from 250 °C to 750 °C, for a duration of 3 h; magnesium sulfate (MS) exposure; and gamma-ray exposure. The effects of elevated temperature and sulfate resistance on concrete mass loss were examined. The results revealed that BS is a promising shielding construction material. The BS content is the most important factor influencing concrete compressive strength. Mixes containing 15% BS demonstrated significantly better strength compared to the control mixes. Exposure to 250 °C led to a notable increase in compressive strength. BS showed a significant effect on HWHPC fire resistance properties, especially at 750 °C and a significant linear attenuation coefficient. Using 10% FA with 15% BS was the most effective mixing proportion for improving all HWHPC properties concertedly, especially at greater ages.

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