Bentonite buffer blocks manufactured by isostatic compression

Heidar Gharbieh, Edgar Bohner, Keijo Haapala, Liisa Salparanta

    Research output: Contribution to journalArticleScientificpeer-review

    Abstract

    Isostatic compression is a technically highly specialised technology for manufacturing solid components from powder. There are only few reported experiences for isostatic compression of bentonite clay, which forms the basis of the engineered barrier system in the geological disposal concept KBS-3V, currently under investigation in Sweden and Finland. An isostatically compressed middle-scale MX-80 bentonite ring block (approximately 2/3 of full-scale diameter) was examined with regard to its dimensions, shape and surface texture. The physical and mechanical characteristics of the middle-scale ring block were analysed. The measured results were compared to previously obtained data from other isostatically compacted disc and ring blocks of similar scale, as well as to a full-scale ring block also manufactured by isostatic compression. Irrespective of the different manufacturing conditions, a consistent homogeneity among the middle-scale blocks and between the middle and full-scale blocks was determined. Results show that isostatic compression is a feasible manufacturing method that meets the high technical standards demanded in nuclear waste management.
    Original languageEnglish
    JournalEnvironmental Geotechnics
    DOIs
    Publication statusE-pub ahead of print - 13 Apr 2018
    MoE publication typeNot Eligible

    Fingerprint

    Bentonite
    bentonite
    Buffers
    compression
    manufacturing
    Radioactive Waste
    Waste management
    Radioactive wastes
    Powders
    Clay
    Textures
    radioactive waste
    homogeneity
    waste management
    texture
    clay

    Keywords

    • cut-off walls & barriers; radioactive waste disposal; strength & testing of materials

    Cite this

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    title = "Bentonite buffer blocks manufactured by isostatic compression",
    abstract = "Isostatic compression is a technically highly specialised technology for manufacturing solid components from powder. There are only few reported experiences for isostatic compression of bentonite clay, which forms the basis of the engineered barrier system in the geological disposal concept KBS-3V, currently under investigation in Sweden and Finland. An isostatically compressed middle-scale MX-80 bentonite ring block (approximately 2/3 of full-scale diameter) was examined with regard to its dimensions, shape and surface texture. The physical and mechanical characteristics of the middle-scale ring block were analysed. The measured results were compared to previously obtained data from other isostatically compacted disc and ring blocks of similar scale, as well as to a full-scale ring block also manufactured by isostatic compression. Irrespective of the different manufacturing conditions, a consistent homogeneity among the middle-scale blocks and between the middle and full-scale blocks was determined. Results show that isostatic compression is a feasible manufacturing method that meets the high technical standards demanded in nuclear waste management.",
    keywords = "cut-off walls & barriers; radioactive waste disposal; strength & testing of materials",
    author = "Heidar Gharbieh and Edgar Bohner and Keijo Haapala and Liisa Salparanta",
    year = "2018",
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    doi = "10.1680/jenge.17.00080",
    language = "English",
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    Bentonite buffer blocks manufactured by isostatic compression. / Gharbieh, Heidar; Bohner, Edgar; Haapala, Keijo; Salparanta, Liisa.

    In: Environmental Geotechnics, 13.04.2018.

    Research output: Contribution to journalArticleScientificpeer-review

    TY - JOUR

    T1 - Bentonite buffer blocks manufactured by isostatic compression

    AU - Gharbieh, Heidar

    AU - Bohner, Edgar

    AU - Haapala, Keijo

    AU - Salparanta, Liisa

    PY - 2018/4/13

    Y1 - 2018/4/13

    N2 - Isostatic compression is a technically highly specialised technology for manufacturing solid components from powder. There are only few reported experiences for isostatic compression of bentonite clay, which forms the basis of the engineered barrier system in the geological disposal concept KBS-3V, currently under investigation in Sweden and Finland. An isostatically compressed middle-scale MX-80 bentonite ring block (approximately 2/3 of full-scale diameter) was examined with regard to its dimensions, shape and surface texture. The physical and mechanical characteristics of the middle-scale ring block were analysed. The measured results were compared to previously obtained data from other isostatically compacted disc and ring blocks of similar scale, as well as to a full-scale ring block also manufactured by isostatic compression. Irrespective of the different manufacturing conditions, a consistent homogeneity among the middle-scale blocks and between the middle and full-scale blocks was determined. Results show that isostatic compression is a feasible manufacturing method that meets the high technical standards demanded in nuclear waste management.

    AB - Isostatic compression is a technically highly specialised technology for manufacturing solid components from powder. There are only few reported experiences for isostatic compression of bentonite clay, which forms the basis of the engineered barrier system in the geological disposal concept KBS-3V, currently under investigation in Sweden and Finland. An isostatically compressed middle-scale MX-80 bentonite ring block (approximately 2/3 of full-scale diameter) was examined with regard to its dimensions, shape and surface texture. The physical and mechanical characteristics of the middle-scale ring block were analysed. The measured results were compared to previously obtained data from other isostatically compacted disc and ring blocks of similar scale, as well as to a full-scale ring block also manufactured by isostatic compression. Irrespective of the different manufacturing conditions, a consistent homogeneity among the middle-scale blocks and between the middle and full-scale blocks was determined. Results show that isostatic compression is a feasible manufacturing method that meets the high technical standards demanded in nuclear waste management.

    KW - cut-off walls & barriers; radioactive waste disposal; strength & testing of materials

    U2 - 10.1680/jenge.17.00080

    DO - 10.1680/jenge.17.00080

    M3 - Article

    JO - Environmental Geotechnics

    JF - Environmental Geotechnics

    SN - 2051-803X

    ER -