Ultrahigh performance concrete as radiation shielding with mixture of high density mineral
Radiation shielding linear attenuation coefficients μ (cm-1) is highly depends on the density of the material used. Previous studies have shown the mineral known as barite can be effectively used to increase the specific density of concrete structures. Barite in Malaysia is limited; therefore, a...
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| Main Author: | |
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| Format: | Thesis |
| Language: | English |
| Published: |
2019
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| Subjects: | |
| Online Access: | http://psasir.upm.edu.my/id/eprint/85498/1/FK%202020%2031%20ir.pdf |
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| Summary: | Radiation shielding linear attenuation coefficients μ (cm-1) is highly depends on the
density of the material used. Previous studies have shown the mineral known as barite
can be effectively used to increase the specific density of concrete structures. Barite in
Malaysia is limited; therefore, a locally available alternative source must be identified
to meet the requirements of high-density concrete for radiation shielding. With the aim
to explore the possibilities, to be further developed for the application in the hot cell,
radiation generating equipment and storing radioactive waste. This study selected steel
fiber-reinforced ultra-high-performance concrete (UHPC) samples with different inert
materials, namely, silica sand (2700kg/m3), amang (4000kg/m3), hematite (2967kg/m3),
barite (4400kg/m3) and lead glass (3038kg/m3), as the study object and tested them
experimentally for their mechanical properties and radiation absorption capabilities.
The UHPC samples showed compressive strength values exceeding 155 MPa at 28
days. Meanwhile, UHPC with lead glass underwent decreased of compression strength
in a long period, and UHPC with amang caused an issue related to radiological safety
despite that it was effective as a γ-ray shield, UHPC with hematite and barite is very
good in radiation absorption but cause an issue of practicality and country reserve.
Thus, the use of UHPC with silica sand is practical for constructing nuclear facilities
because of the abundance and cost-effectiveness of the involved materials. |
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