Thermo-Hydro-Mechanical characterization of OPHELIE backfill mixture

Enrique Romero, Xiang Ling Li, Frédéric Bernier

    Research outputpeer-review


    Within the framework of the OPHELIE surface mock-up test,a Belgian reference repository concept for high level radioactive waste disposal—an exhaustive experimental program under oedometer conditions was carried out to characterize the thermo-hydro-mechanical(THM) response of the backfill material used. This material,pre-compacted in high-density blocks,was made up of 60% FoCa clay,35% sand and 5% graphite in a dry mass basis. Besides a brief description of the temperature and suction controlled equipment used,selected experimental results related to water retention properties,compressibility on loading at different total suctions and temperatures,as well as swelling capacity and collapsibility on soaking and heating,are also presented and interpreted.
    Original languageEnglish
    Pages (from-to)733-740
    JournalChinese Journal of Rock Mechanics and Engineering
    Issue number4
    StatePublished - 15 Apr 2006

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