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Engineering properties of concrete suitable for constructing physical barriers in radioactive waste disposal facilities
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SYSNO ASEP 0506552 Druh ASEP C - Konferenční příspěvek (mezinárodní konf.) Zařazení RIV D - Článek ve sborníku Název Engineering properties of concrete suitable for constructing physical barriers in radioactive waste disposal facilities Tvůrce(i) Vejmelková, E. (CZ)
Koťátková, J. (CZ)
Bezdička, Petr (UACH-T) SAI, RID, ORCID
Konvalinka, P. (CZ)
Černý, R. (CZ)Celkový počet autorů 5 Zdroj.dok. 17th International Multidisciplinary Scientific GeoConference Surveying Geology and Mining Ecology Management, SGEM 2017. - Sofia : STEF92 Technology, 2017 - ISSN 1314-2704 - ISBN 978-619-7408-13-3 Rozsah stran roč. 17, č. 62 (2017), s. 147-154 Poč.str. 8 s. Forma vydání Online - E Akce International Multidisciplinary Scientific GeoConference /17./ SGEM 2017 Datum konání 29.06.2017 - 05.07.2017 Místo konání Albena Země BG - Bulharsko Typ akce WRD Jazyk dok. eng - angličtina Země vyd. BG - Bulharsko Klíč. slova Cement composites ; Engineering properties ; Pore size distribution ; Radioactive waste disposal Vědní obor RIV CA - Anorganická chemie Obor OECD Inorganic and nuclear chemistry CEP GA17-11635S GA ČR - Grantová agentura ČR Institucionální podpora UACH-T - RVO:61388980 EID SCOPUS 85032394048 DOI 10.5593/sgem2017/62/S26.019 Anotace Several concrete mixtures suitable for constructing engineered barriers in radioactive waste disposal facilities are designed and tested. The mix design is based on the utilization of a natural sorbent acting, at the same time, as supplementary cementitious material replacing a part of Portland cement and fine filler capable of radionuclide absorption and fixing. A representative set of engineering properties of the hardened concrete mixes is determined, including the pore size distribution, bulk density, matrix density, open porosity, compressive strength, water absorption coefficient, and apparent moisture diffusivity. Experimental results show that an appropriate dosage of the natural sorbent in the analyzed concrete is within the range of 30-50% of the mass of Portland cement. This level of Portland cement replacement makes possible to utilize effectively the pozzolanic properties of the sorbent and still preserve its necessary amount in the non-hydrated state. The mechanical properties of concrete are then satisfactory for the supposed load, the water-penetration protection ability is sufficient, and the microcrystalline structure of non-hydrated sorbent can provide a sufficient interior pore surface area for fixing the anticipated radionuclide dose. Pracoviště Ústav anorganické chemie Kontakt Jana Kroneislová, krone@iic.cas.cz, Tel.: 311 236 931 Rok sběru 2020 Elektronická adresa https://www.sgem.org/index.php/elibrary?view=publication&task=show&id=4524
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