Radiation hardening of constructional cement–magnetite–serpentinite composite under gamma irradiation at increased dose
| Autor: | R. N. Yastrebinskii, V. I. Pavlenko, Gennady G. Bondarenko |
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| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Cement Materials science Composite number General Engineering 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences law.invention chemistry.chemical_compound Portland cement chemistry law Absorbed dose Ferrite (iron) 0103 physical sciences Bound water General Materials Science Composite material 0210 nano-technology Radiation hardening Magnetite |
| Zdroj: | Inorganic Materials: Applied Research. 8:691-695 |
| ISSN: | 2075-115X 2075-1133 |
| DOI: | 10.1134/s207511331705029x |
| Popis: | It is shown that a constructional radiation-shielding composite material with high resistance to radiation-thermal loads can be obtained. The material was produced using a Portland cement mix, boron-containing chrysotile, magnetite filler, plasticizing additives, and metal fraction by the vibro-packing method. The content of chemically bound water was at least 1.5 wt %. Exposure to high doses of gamma radiation led to formation of monocalcium ferrite CaFe2O4 with high physical and X-ray density in the cement–magnetite–serpentinite composite. Its formation resulted in radiation hardening and increased the mechanical strength of the composite up to the dose of 10 MGy. When a protective composite was exposed to γ radiation with the absorbed dose of 20 MGy, the mechanical strength of the composite was reduced by only 4–5% compared to that of the unirradiated sample. |
| Databáze: | OpenAIRE |
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