Comparative modelling of laboratory experiments for the hydro-mechanical behaviour of a compacted bentonite–sandnmixture

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68145535%3A_____%2F16%3A00463747" target="_blank" >RIV/68145535:_____/16:00463747 - isvavai.cz</a>

Result on the web

<a href="http://link.springer.com/article/10.1007/s12665-016-6118-z" target="_blank" >http://link.springer.com/article/10.1007/s12665-016-6118-z</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s12665-016-6118-z" target="_blank" >10.1007/s12665-016-6118-z</a>

Result language

angličtina

Original language name

Comparative modelling of laboratory experiments for the hydro-mechanical behaviour of a compacted bentonite–sandnmixture

Original language description

A comparative modelling exercise involving several independent teams from the DECOVALEX-2015 project is presented in this paper. The exercise is based on various laboratory experiments that have been carried out in the framework of a French research programme called SEALEX and conducted by the IRSN. The programme focuses on the long-term performance of swelling clay-based sealing systems that provide an important contribution to the safety of underground nuclear waste disposal facilities. A number of materials are being considered in the sealing systems; the current work focuses on a 70/30 MX80 bentonite–sand mixture compacted at dry densities between 1.67 and 1.97 Mg/m3. The improved understanding of the full set of hydro-mechanical processes affecting the behaviour of an in situ sealing system requires both experiments ranging from small-scale laboratory tests to full-scale field emplacement studies and coupled hydro-mechanical models that are able to explain the observations in the experiments. The approach was to build models of increasing complexity starting for the simplest laboratory experiments and building towards the full-scale in situ experiments. Following this approach, two sets of small-scale laboratory experiments have been performed and modelled. The first set of experiments involves characterizing the hydro-mechanical behaviour of the bentonite–sand mixture by means of (1) water retention tests under both constant volume and free swell conditions, (2) infiltration test under constant volume condition, and (3) swelling and compression tests under suction control conditions. The second, more complex, experiment is a 1/10th scale mock-up of a larger-scale in situ experiment. Modelling of the full-scale experiment is described in a companion paper.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

DB - Geology and mineralogy

OECD FORD branch

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Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2016

Confidentiality

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

Name of the periodical

Environmental Earth Sciences

ISSN

1866-6280

e-ISSN

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Volume of the periodical

75

Issue of the periodical within the volume

20

Country of publishing house

DE - GERMANY

Number of pages

18

Pages from-to

1311-1327

UT code for WoS article

000385135100012

EID of the result in the Scopus database

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