Thermal Water Retention Characteristics of Compacted Bentonite

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F18%3A10388360" target="_blank" >RIV/00216208:11310/18:10388360 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1007/978-981-13-0095-0" target="_blank" >https://doi.org/10.1007/978-981-13-0095-0</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/978-981-13-0095-0" target="_blank" >10.1007/978-981-13-0095-0</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Thermal Water Retention Characteristics of Compacted Bentonite

Popis výsledku v původním jazyce

Compacted bentonites are popularly being considered as buffer or backfill material in high level nuclear waste repositories around the world. These bentonites may undergo various conditions including hydration from around geo-environmental water and heating by the radiation of the used fuel during its period of operation. Water retention properties of as-compacted Czech bentonite B75 with three initial dry densities (1.27 g/cm3, 1.60 g/cm3 and 1.90 g/cm3) and bentonite powders were investigated within temperature 20-80 °C at unconfined conditions. Vapor equilibrium method was used to control constant relative humidity. The influence of temperature on water retention properties was analyzed and discussed. Results show that the temperature decreased water retention capacity for all cases. The water retention capacity is lower at high temperature especially at lower suction. The temperature has more significant effect on drying path than wetting path. Furthermore, the volume swelling decreased with the increased temperature upon saturation. The hysteretic behavior decreased with the increase of temperature for all studied materials.

Název v anglickém jazyce

Thermal Water Retention Characteristics of Compacted Bentonite

Popis výsledku anglicky

Compacted bentonites are popularly being considered as buffer or backfill material in high level nuclear waste repositories around the world. These bentonites may undergo various conditions including hydration from around geo-environmental water and heating by the radiation of the used fuel during its period of operation. Water retention properties of as-compacted Czech bentonite B75 with three initial dry densities (1.27 g/cm3, 1.60 g/cm3 and 1.90 g/cm3) and bentonite powders were investigated within temperature 20-80 °C at unconfined conditions. Vapor equilibrium method was used to control constant relative humidity. The influence of temperature on water retention properties was analyzed and discussed. Results show that the temperature decreased water retention capacity for all cases. The water retention capacity is lower at high temperature especially at lower suction. The temperature has more significant effect on drying path than wetting path. Furthermore, the volume swelling decreased with the increased temperature upon saturation. The hysteretic behavior decreased with the increase of temperature for all studied materials.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

10505 - Geology

Projekt

<a href="/cs/project/GA15-05935S" target="_blank" >GA15-05935S: Vývoj termo-hydro-mechanického modelu pro expanzívní zeminy a simulace úložiště radioaktivních odpadů</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název statě ve sborníku

Proceedings of GeoShanghai 2018 International Conference: Multi-physics Processes in Soil Mechanics and Advances in Geotechnical Testing

ISBN

978-981-13-0095-0

ISSN

—

e-ISSN

neuvedeno

Počet stran výsledku

8

Strana od-do

71-78

Název nakladatele

Springer

Místo vydání

Berlin

Místo konání akce

Shanghai

Datum konání akce

27. 5. 2018

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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