Nanomechanical properties of neutron-irradiated concrete
Concrete exposed to irradiation from nuclear reactor undergoes atomic-level degradation due to the influence of neutrons, secondary gamma rays, and associated gamma heating. The radiationinduced damage decreases the mechanical properties of the concrete and affects its performance as a construction...
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| Format: | Article |
| Language: | English |
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Czech Technical University in Prague
2024-12-01
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| Series: | Acta Polytechnica CTU Proceedings |
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| Online Access: | https://ojs.cvut.cz/ojs/index.php/APP/article/view/10349 |
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| author | Ondřej Libera Jiří Němeček Patricie Halodová Zbyněk Hlaváč Jiří Němeček |
| author_facet | Ondřej Libera Jiří Němeček Patricie Halodová Zbyněk Hlaváč Jiří Němeček |
| author_sort | Ondřej Libera |
| collection | DOAJ |
| description |
Concrete exposed to irradiation from nuclear reactor undergoes atomic-level degradation due to the influence of neutrons, secondary gamma rays, and associated gamma heating. The radiationinduced damage decreases the mechanical properties of the concrete and affects its performance as a construction material. The concrete samples analysed in this work were prepared from blended Portland cement CEM II 32.5R mixed with siliceous aggregates with a size of 0–2.5 mm. The material underwent irradiation in the LVR-15 research reactor in Research Centre Rež to the target neutron fluence of 1.6–1.8 · 1019 n cm−2 (E>0.1MeV) and received the gamma dose of ⁓ 500 MGy. The temperatures during irradiation were kept within a range of 50–60 °C. The mechanical properties of the individual phases in the cementitious matrix after neutron irradiation were assessed by the nanoindentation. To track the evolution of the nanomechanical properties of individual components under radiation, a comparison was made between the mechanical properties of neutron-irradiated material and pristine concrete.
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| format | Article |
| id | doaj-art-eb4a08d7aebe43fea57dac97bf9b2cf0 |
| institution | DOAJ |
| issn | 2336-5382 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Czech Technical University in Prague |
| record_format | Article |
| series | Acta Polytechnica CTU Proceedings |
| spelling | doaj-art-eb4a08d7aebe43fea57dac97bf9b2cf02025-08-20T03:19:56ZengCzech Technical University in PragueActa Polytechnica CTU Proceedings2336-53822024-12-015010.14311/APP.2024.50.0030Nanomechanical properties of neutron-irradiated concreteOndřej Libera0Jiří Němeček1https://orcid.org/0000-0002-5635-695XPatricie Halodová2Zbyněk Hlaváč3Jiří Němeček4https://orcid.org/0000-0002-3565-8182Research Centre Rež, Department of Material and Mechanical Properties, Hlavní 130, 250 68 Husinec-Rež, Czech RepublicCzech Technical University in Prague, Faculty of Civil Engineering, Department of Mechanics, Thákurova 7, 166 29 Prague 6, Czech RepublicResearch Centre Rež, Department of Material and Mechanical Properties, Hlavní 130, 250 68 Husinec-Rež, Czech RepublicResearch Centre Rež, Department of Material and Mechanical Properties, Hlavní 130, 250 68 Husinec-Rež, Czech RepublicCzech Technical University in Prague, Faculty of Civil Engineering, Department of Mechanics, Thákurova 7, 166 29 Prague 6, Czech Republic Concrete exposed to irradiation from nuclear reactor undergoes atomic-level degradation due to the influence of neutrons, secondary gamma rays, and associated gamma heating. The radiationinduced damage decreases the mechanical properties of the concrete and affects its performance as a construction material. The concrete samples analysed in this work were prepared from blended Portland cement CEM II 32.5R mixed with siliceous aggregates with a size of 0–2.5 mm. The material underwent irradiation in the LVR-15 research reactor in Research Centre Rež to the target neutron fluence of 1.6–1.8 · 1019 n cm−2 (E>0.1MeV) and received the gamma dose of ⁓ 500 MGy. The temperatures during irradiation were kept within a range of 50–60 °C. The mechanical properties of the individual phases in the cementitious matrix after neutron irradiation were assessed by the nanoindentation. To track the evolution of the nanomechanical properties of individual components under radiation, a comparison was made between the mechanical properties of neutron-irradiated material and pristine concrete. https://ojs.cvut.cz/ojs/index.php/APP/article/view/10349concretenanoindentationneutron irradiationmechanical properties |
| spellingShingle | Ondřej Libera Jiří Němeček Patricie Halodová Zbyněk Hlaváč Jiří Němeček Nanomechanical properties of neutron-irradiated concrete Acta Polytechnica CTU Proceedings concrete nanoindentation neutron irradiation mechanical properties |
| title | Nanomechanical properties of neutron-irradiated concrete |
| title_full | Nanomechanical properties of neutron-irradiated concrete |
| title_fullStr | Nanomechanical properties of neutron-irradiated concrete |
| title_full_unstemmed | Nanomechanical properties of neutron-irradiated concrete |
| title_short | Nanomechanical properties of neutron-irradiated concrete |
| title_sort | nanomechanical properties of neutron irradiated concrete |
| topic | concrete nanoindentation neutron irradiation mechanical properties |
| url | https://ojs.cvut.cz/ojs/index.php/APP/article/view/10349 |
| work_keys_str_mv | AT ondrejlibera nanomechanicalpropertiesofneutronirradiatedconcrete AT jirinemecek nanomechanicalpropertiesofneutronirradiatedconcrete AT patriciehalodova nanomechanicalpropertiesofneutronirradiatedconcrete AT zbynekhlavac nanomechanicalpropertiesofneutronirradiatedconcrete AT jirinemecek nanomechanicalpropertiesofneutronirradiatedconcrete |