An interlaboratory comparison of methods for measuring rock matrix porosity

Kari Rasilainen, Karl-Heinz Hellmuth, Liisa Kivekäs, Avner Melamed, Timo Ruskeeniemi, Marja Siitari-Kauppi, Jussi Timonen, Matti Valkiainen

    Research output: Book/ReportReport

    7 Citations (Scopus)

    Abstract

    An interlaboratory comparison study was conducted for the available Finnish methods of rock matrix porosity measurements. The aim was first to compare different experimental methods for future applications, and second to obtain quality assured data for the needs of matrix diffusion modelling. Three different versions of water immersion techniques, a tracer elution method, a helium gas through-diffusion method, and a C-14-PMMA method were tested. All methods selected for this study were established experimental tools in the respective laboratories, and they had already been individually tested. Rock samples for the study were obtained from a homogeneous granitic drill core section from the natural analogue site at Palmottu. The drill core section was cut into slabs that were expected to be practically identical. The subsamples were then circulated between the different laboratories using a round robin approach. The circulation was possible because all methods were non-destructive, except the C-14-PMMA method, which was always the last method to be applied. The possible effect of drying temperature on the measured porosity was also preliminarily tested. These measurements were done in the order of increasing drying temperature. If drying temperature had an effect on the measured porosity, it should therefore have been seen as a systematic change in the results. Based on the study, it can be concluded that all methods are comparable in their accuracy. The selection of methods for future applications can therefore be based on practical considerations. Drying temperature seemed to have very little effect on the measured porosity, but a more detailed study is needed for definite conclusions.
    Original languageEnglish
    Place of PublicationEspoo
    PublisherVTT Technical Research Centre of Finland
    Number of pages50
    ISBN (Print)951-38-4971-6
    Publication statusPublished - 1996
    MoE publication typeNot Eligible

    Publication series

    SeriesVTT Tiedotteita - Meddelanden - Research Notes
    Number1776
    ISSN1235-0605

    Fingerprint

    interlaboratory comparison
    porosity
    matrix
    rock
    method
    measuring
    temperature
    natural analog
    data quality
    helium
    slab

    Keywords

    • measurement
    • methods
    • comparison
    • experimentation
    • laboratories
    • rocks
    • granite
    • porosity
    • drying
    • temperature
    • quality
    • radioactive wastes

    Cite this

    Rasilainen, K., Hellmuth, K-H., Kivekäs, L., Melamed, A., Ruskeeniemi, T., Siitari-Kauppi, M., ... Valkiainen, M. (1996). An interlaboratory comparison of methods for measuring rock matrix porosity. Espoo: VTT Technical Research Centre of Finland. VTT Tiedotteita - Meddelanden - Research Notes, No. 1776
    Rasilainen, Kari ; Hellmuth, Karl-Heinz ; Kivekäs, Liisa ; Melamed, Avner ; Ruskeeniemi, Timo ; Siitari-Kauppi, Marja ; Timonen, Jussi ; Valkiainen, Matti. / An interlaboratory comparison of methods for measuring rock matrix porosity. Espoo : VTT Technical Research Centre of Finland, 1996. 50 p. (VTT Tiedotteita - Meddelanden - Research Notes; No. 1776).
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    abstract = "An interlaboratory comparison study was conducted for the available Finnish methods of rock matrix porosity measurements. The aim was first to compare different experimental methods for future applications, and second to obtain quality assured data for the needs of matrix diffusion modelling. Three different versions of water immersion techniques, a tracer elution method, a helium gas through-diffusion method, and a C-14-PMMA method were tested. All methods selected for this study were established experimental tools in the respective laboratories, and they had already been individually tested. Rock samples for the study were obtained from a homogeneous granitic drill core section from the natural analogue site at Palmottu. The drill core section was cut into slabs that were expected to be practically identical. The subsamples were then circulated between the different laboratories using a round robin approach. The circulation was possible because all methods were non-destructive, except the C-14-PMMA method, which was always the last method to be applied. The possible effect of drying temperature on the measured porosity was also preliminarily tested. These measurements were done in the order of increasing drying temperature. If drying temperature had an effect on the measured porosity, it should therefore have been seen as a systematic change in the results. Based on the study, it can be concluded that all methods are comparable in their accuracy. The selection of methods for future applications can therefore be based on practical considerations. Drying temperature seemed to have very little effect on the measured porosity, but a more detailed study is needed for definite conclusions.",
    keywords = "measurement, methods, comparison, experimentation, laboratories, rocks, granite, porosity, drying, temperature, quality, radioactive wastes",
    author = "Kari Rasilainen and Karl-Heinz Hellmuth and Liisa Kivek{\"a}s and Avner Melamed and Timo Ruskeeniemi and Marja Siitari-Kauppi and Jussi Timonen and Matti Valkiainen",
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    Rasilainen, K, Hellmuth, K-H, Kivekäs, L, Melamed, A, Ruskeeniemi, T, Siitari-Kauppi, M, Timonen, J & Valkiainen, M 1996, An interlaboratory comparison of methods for measuring rock matrix porosity. VTT Tiedotteita - Meddelanden - Research Notes, no. 1776, VTT Technical Research Centre of Finland, Espoo.

    An interlaboratory comparison of methods for measuring rock matrix porosity. / Rasilainen, Kari; Hellmuth, Karl-Heinz; Kivekäs, Liisa; Melamed, Avner; Ruskeeniemi, Timo; Siitari-Kauppi, Marja; Timonen, Jussi; Valkiainen, Matti.

    Espoo : VTT Technical Research Centre of Finland, 1996. 50 p. (VTT Tiedotteita - Meddelanden - Research Notes; No. 1776).

    Research output: Book/ReportReport

    TY - BOOK

    T1 - An interlaboratory comparison of methods for measuring rock matrix porosity

    AU - Rasilainen, Kari

    AU - Hellmuth, Karl-Heinz

    AU - Kivekäs, Liisa

    AU - Melamed, Avner

    AU - Ruskeeniemi, Timo

    AU - Siitari-Kauppi, Marja

    AU - Timonen, Jussi

    AU - Valkiainen, Matti

    PY - 1996

    Y1 - 1996

    N2 - An interlaboratory comparison study was conducted for the available Finnish methods of rock matrix porosity measurements. The aim was first to compare different experimental methods for future applications, and second to obtain quality assured data for the needs of matrix diffusion modelling. Three different versions of water immersion techniques, a tracer elution method, a helium gas through-diffusion method, and a C-14-PMMA method were tested. All methods selected for this study were established experimental tools in the respective laboratories, and they had already been individually tested. Rock samples for the study were obtained from a homogeneous granitic drill core section from the natural analogue site at Palmottu. The drill core section was cut into slabs that were expected to be practically identical. The subsamples were then circulated between the different laboratories using a round robin approach. The circulation was possible because all methods were non-destructive, except the C-14-PMMA method, which was always the last method to be applied. The possible effect of drying temperature on the measured porosity was also preliminarily tested. These measurements were done in the order of increasing drying temperature. If drying temperature had an effect on the measured porosity, it should therefore have been seen as a systematic change in the results. Based on the study, it can be concluded that all methods are comparable in their accuracy. The selection of methods for future applications can therefore be based on practical considerations. Drying temperature seemed to have very little effect on the measured porosity, but a more detailed study is needed for definite conclusions.

    AB - An interlaboratory comparison study was conducted for the available Finnish methods of rock matrix porosity measurements. The aim was first to compare different experimental methods for future applications, and second to obtain quality assured data for the needs of matrix diffusion modelling. Three different versions of water immersion techniques, a tracer elution method, a helium gas through-diffusion method, and a C-14-PMMA method were tested. All methods selected for this study were established experimental tools in the respective laboratories, and they had already been individually tested. Rock samples for the study were obtained from a homogeneous granitic drill core section from the natural analogue site at Palmottu. The drill core section was cut into slabs that were expected to be practically identical. The subsamples were then circulated between the different laboratories using a round robin approach. The circulation was possible because all methods were non-destructive, except the C-14-PMMA method, which was always the last method to be applied. The possible effect of drying temperature on the measured porosity was also preliminarily tested. These measurements were done in the order of increasing drying temperature. If drying temperature had an effect on the measured porosity, it should therefore have been seen as a systematic change in the results. Based on the study, it can be concluded that all methods are comparable in their accuracy. The selection of methods for future applications can therefore be based on practical considerations. Drying temperature seemed to have very little effect on the measured porosity, but a more detailed study is needed for definite conclusions.

    KW - measurement

    KW - methods

    KW - comparison

    KW - experimentation

    KW - laboratories

    KW - rocks

    KW - granite

    KW - porosity

    KW - drying

    KW - temperature

    KW - quality

    KW - radioactive wastes

    M3 - Report

    SN - 951-38-4971-6

    T3 - VTT Tiedotteita - Meddelanden - Research Notes

    BT - An interlaboratory comparison of methods for measuring rock matrix porosity

    PB - VTT Technical Research Centre of Finland

    CY - Espoo

    ER -

    Rasilainen K, Hellmuth K-H, Kivekäs L, Melamed A, Ruskeeniemi T, Siitari-Kauppi M et al. An interlaboratory comparison of methods for measuring rock matrix porosity. Espoo: VTT Technical Research Centre of Finland, 1996. 50 p. (VTT Tiedotteita - Meddelanden - Research Notes; No. 1776).