Engineering properties of concrete suitable for constructing physical barriers in radioactive waste disposal facilities

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388980%3A_____%2F17%3A00506552" target="_blank" >RIV/61388980:_____/17:00506552 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68407700:21110/17:00312337

Výsledek na webu

<a href="https://www.sgem.org/index.php/elibrary?view=publication&task=show&id=4524" target="_blank" >https://www.sgem.org/index.php/elibrary?view=publication&task=show&id=4524</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.5593/sgem2017/62/S26.019" target="_blank" >10.5593/sgem2017/62/S26.019</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Engineering properties of concrete suitable for constructing physical barriers in radioactive waste disposal facilities

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

Engineering properties of concrete suitable for constructing physical barriers in radioactive waste disposal facilities

Popis výsledku anglicky

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.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

10402 - Inorganic and nuclear chemistry

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

17th International Multidisciplinary Scientific GeoConference Surveying Geology and Mining Ecology Management, SGEM 2017

ISBN

978-619-7408-13-3

ISSN

1314-2704

e-ISSN

—

Počet stran výsledku

8

Strana od-do

"Roč. 17"

Název nakladatele

STEF92 Technology

Místo vydání

Sofia

Místo konání akce

Albena

Datum konání akce

29. 6. 2017

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

—